Month: September 2025

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The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is known for its precision shifting and durability. However, its performance depends heavily on correct installation. Riders often debate whether to tackle the installation themselves or leave it to a professional mechanic. This guide examines both options in detail, offering clear insights into the process, the challenges, and the advantages of each approach.

Understanding the Shimano FD-6700 Front Derailleur

The FD-6700 [paid link] was designed specifically for 10-speed road drivetrains. Its wide link design enhances stiffness, reducing flex under load and improving front shifting accuracy. The derailleur is compatible with double chainring configurations and works best when paired with other Ultegra 6700 series components. Because of its specific geometry and cable routing, proper setup is critical to achieving smooth, reliable shifting.

Tools Required

  • 5 mm hex wrench
  • Torque wrench [paid link] (with Nm scale)
  • Cable cutters
  • Phillips screwdriver
  • Bike stand [paid link] (recommended for stability)
  • Chain checker (optional for drivetrain health)

DIY Installation of the FD-6700 Front Derailleur

For riders with mechanical aptitude and patience, installing the FD-6700 [paid link] at home is possible. The process requires attention to detail and a methodical approach.

First, the derailleur must be mounted at the correct height. The outer cage plate should sit 1–3 mm above the tallest chainring tooth. Misalignment here is one of the most common causes of poor shifting. Next, the derailleur body must be rotated so that the cage runs parallel to the chainrings. Even a small angle error can lead to chain rub or sluggish movement between rings.

Cable tension is the most delicate part of the setup. The FD-6700 uses a bottom-pull or dual-pull cable routing, depending on the frame. Correct tension ensures the derailleur moves quickly and without hesitation. Once the cable is secured, the limit screws must be adjusted carefully. The low limit screw prevents the chain from dropping off the small chainring, while the high limit screw keeps it from overshooting the large chainring.

DIY installation allows riders to learn more about their bikes and make quick adjustments in the future. However, it demands patience and accuracy. Small mistakes, such as over-tightened limit screws or misaligned cage positioning, can result in noisy shifting, chain drops, or premature wear on the drivetrain.

Professional Installation of the FD-6700

A professional mechanic brings experience and precision tools to the installation process. Most shops use calibrated torque wrenches to ensure bolts are tightened to Shimano’s specifications, preventing both slippage and frame damage. Mechanics also have the benefit of repetition; they have installed countless FD-6700 derailleurs and can recognize alignment issues instantly.

One key advantage of professional setup is drivetrain integration. A mechanic will not only mount the derailleur but also check the chainline, bottom bracket spacing, and cable routing. These checks ensure that the derailleur works optimally with the crankset, shifters, and chain. Furthermore, professionals can fine-tune shifting under load—something that is difficult to replicate in a home environment without a proper work stand and test ride.

The additional cost of professional service pays off in reliability. Riders who race, train heavily, or rely on consistent performance may find this option worthwhile.

Cost and Time Considerations

DIY installation is cost-effective since it eliminates labor fees. Most riders already own the basic tools, though investing in a torque wrench [paid link] may be necessary. The trade-off is time. A careful first-time setup may take over an hour, while a mechanic can typically complete the job in under 30 minutes.

Professional installation costs vary depending on location but generally fall between the price of a standard derailleur adjustment and a full drivetrain tune-up. The benefit is peace of mind and guaranteed performance, particularly for riders less confident in their mechanical skills.

Which Option Is Right for You?

Choosing between DIY and professional installation depends on the rider’s priorities. A mechanically inclined cyclist who enjoys working on their bike and has the patience to follow specifications closely may find DIY installation rewarding. However, those who value precision, reliability, and time efficiency will likely prefer professional setup.

Ultimately, the Shimano FD-6700 is a precise component that performs at its best when installed with care. Whether that care comes from your own hands or those of a skilled mechanic determines the best installation choice for you.

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The Shimano FD-6700 [paid link] Ultegra front derailleur is a precise component designed to deliver smooth and accurate shifts. However, to maintain its performance over time, it requires consistent cleaning and lubrication. Dirt, road grime, and moisture can quickly compromise shifting accuracy if not addressed properly. This guide explains the best lubrication and cleaning routine specifically for the FD-6700 [paid link], ensuring reliability and longevity.

Understanding the Shimano FD-6700 Front Derailleur

The FD-6700 [paid link] is a braze-on style front derailleur designed for 10-speed drivetrains. Its lightweight aluminum construction and wide link design provide stiffness for better shifting. Unlike older models, the FD-6700 demands precise set-up and ongoing maintenance to keep shifts crisp. Because its pivots and linkage points are exposed, they are vulnerable to contamination, making proper cleaning and lubrication essential.

Tools Required

  • Mild bike-specific degreaser
  • Clean microfiber cloths
  • Soft-bristle brush or old toothbrush
  • Light synthetic lubricant (drip bottle, not spray)
  • Isopropyl alcohol (optional for final wipe-down)

Step 1: Preparing the FD-6700 for Cleaning

Before cleaning, shift the derailleur to the small chainring position to reduce cable tension. This position exposes more of the derailleur cage and linkage, making it easier to access the key areas. If the bike is heavily contaminated with dirt, rinse gently with water first to prevent scratching during cleaning.

Step 2: Removing Dirt and Grime

The derailleur’s pivots and inner cage plates are prone to dirt buildup from chain lubricant. Apply a small amount of bike-specific degreaser to the cage plates and pivot areas. Use a soft brush to work the degreaser into crevices without forcing contaminants deeper inside. Wipe thoroughly with a microfiber cloth until the surfaces are free of residue. Avoid soaking the derailleur, as this can wash out factory-applied grease in the pivots.

Step 3: Drying the Derailleur

Once cleaned, allow the derailleur to dry fully before applying lubrication. Use a dry microfiber cloth to remove moisture from the linkage and cage. For faster drying, you may use isopropyl alcohol on a cloth, which evaporates quickly and leaves the surface clean.

Step 4: Lubricating the FD-6700 Pivots

The FD-6700 has several key pivot points that must move freely for accurate shifting. Apply one drop of light synthetic lubricant directly onto each pivot. Work the derailleur back and forth by hand to distribute the lubricant evenly. Wipe away any excess to prevent attracting new dirt. Do not apply grease or heavy oils, as these will stiffen the pivots and collect grime.

Step 5: Lubricating the Cage Contact Areas

The inner and outer cage plates can develop noise where the chain makes contact. To minimize friction, apply a thin film of lubricant to the inside of the derailleur cage. This should be done sparingly, as too much lubricant here can transfer onto the chain and cause contamination. After applying, wipe down the surfaces so only a trace remains.

Step 6: Avoiding Common Mistakes

Many riders make the mistake of over-lubricating their FD-6700, leading to sticky pivots and poor shifting. Another common error is using aerosol sprays, which can spread lubricant uncontrollably and contaminate braking surfaces. Always apply lubricant with precision and wipe away the excess immediately.

Recommended Cleaning Frequency

For most riders, cleaning and lubricating the FD-6700 every two to three weeks is sufficient. However, if you frequently ride in wet or dusty conditions, maintenance should be performed weekly. After a rainy ride, clean and lubricate the derailleur as soon as possible to prevent rust from forming on the pivots.

Long-Term Performance Benefits

Following this routine ensures the Shimano FD-6700 continues to shift with accuracy. Clean pivots reduce cable drag, while proper lubrication keeps the linkage operating smoothly. In the long term, this routine extends the lifespan of the derailleur, delays wear, and minimizes the need for replacement parts.

Conclusion

The Shimano FD-6700 front derailleur is a high-performance component that requires careful maintenance to deliver consistent results. A regular routine of cleaning dirt buildup, drying thoroughly, and applying light lubrication to pivots and cage surfaces ensures optimal performance. By avoiding over-lubrication and focusing on precision, riders can keep their FD-6700 shifting as smoothly as the day it was installed.

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The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is designed for precise shifting under road cycling conditions. However, like all drivetrain components, it is prone to wear if not maintained correctly. Premature wear reduces performance, causes inconsistent shifting, and may lead to costly replacements. This guide explains how to prevent early deterioration of the FD-6700 [paid link] and ensure long-term reliability.

Understanding the FD-6700 Front Derailleur

The FD-6700 [paid link] front derailleur is a braze-on or clamp-type component designed for 10-speed road drivetrains. It works best with Shimano Ultegra 6700 cranksets and STI shifters. Its design includes a wide link construction for rigidity and a lightweight alloy cage for quick and precise chain movement. Preventing wear requires attention to the contact points, the cage, and the linkage pivots.

Causes of Premature Wear

Several factors accelerate wear on the FD-6700 front derailleur. Improper setup, neglect, and environmental conditions are the most common contributors. Understanding these factors helps in creating a maintenance strategy:

  • Misaligned derailleur height or angle increases cage rubbing.
  • Over-tight cable tension places excess strain on pivots.
  • Lack of lubrication causes corrosion and friction in moving parts.
  • Dirt, road salt, and debris accelerate material degradation.
  • Cross-chaining leads to chain rub on the cage.

By controlling these issues, the derailleur can function smoothly for years.

Proper Installation to Prevent Wear

Correct installation is the first step toward extending the life of the FD-6700. The derailleur must be mounted so that the outer cage plate sits 1–3 mm above the large chainring and remains parallel to it. If the cage is angled incorrectly, the chain will scrape excessively against the plates. Limit screw adjustments should be precise to prevent unnecessary side-loading during shifts. Improper cable routing or over-tension can also cause premature pivot wear.

Routine Cleaning and Lubrication

The FD-6700 front derailleur requires consistent cleaning to avoid dirt buildup. Road grime collects on the cage plates and around the pivot points, causing shifting drag and corrosion. Regular maintenance should include:

  • Wiping the derailleur after wet or muddy rides.
  • Cleaning the cage plates with a degreaser to prevent chain residue buildup.
  • Applying a light lubricant to pivot points while avoiding overspray on the cage surfaces.
  • Ensuring that excess oil does not attract more grit, which accelerates wear.

Proper lubrication not only reduces friction but also prevents rust from forming inside the pivots.

Cable and Housing Maintenance

Cable tension plays a significant role in the longevity of the FD-6700. Old, frayed, or corroded cables increase shifting resistance and wear down the derailleur’s mechanism. To extend the life of the component:

  • Replace cables and housing regularly, especially after wet seasons.
  • Check for kinks or dirt inside the housing that can strain the derailleur pivots.
  • Apply a thin layer of grease to new cables to reduce friction.

Smooth cable movement reduces stress on the derailleur and prevents unnecessary pivot fatigue.

Avoiding Cross-Chaining

Cross-chaining, such as riding in the big chainring and largest cassette cog, forces the chain at an extreme angle. This places heavy lateral stress on the derailleur cage. Consistent use of extreme gear combinations accelerates cage plate wear. To minimize damage:

  • Stay within reasonable chain angles for smooth pedaling.
  • Shift to the small chainring when climbing with large cogs.
  • Use the big chainring primarily with middle-to-small cogs.

By practicing efficient gear use, riders reduce unnecessary friction and prolong derailleur life.

Seasonal and Environmental Protection

The FD-6700 is vulnerable to moisture, grit, and corrosive road salt. Riders who frequently cycle in winter or near the coast should take additional precautions:

  • Rinse the derailleur with fresh water after salty or sandy rides.
  • Apply corrosion-resistant spray to the pivots.
  • Store the bike indoors to prevent long-term exposure to humidity.

Protecting the component from harsh environments significantly reduces the risk of rust and seizing.

Monitoring Wear Indicators

The FD-6700 gives clear signs when wear is setting in. These include sluggish shifts, increased chain rub despite correct adjustments, or visible cage deformation. Pivot looseness is another sign of fatigue, as worn bushings reduce shifting precision. Identifying and addressing these issues early can prevent total failure and extend usable life.

Extending Lifespan Through Proper Use

The FD-6700 front derailleur can last for many thousands of kilometers if used correctly. Riders should avoid forcing shifts under heavy load, as this strains the mechanism. Instead, easing off the pedals slightly during front shifts reduces wear on both the chain and the derailleur cage. When combined with routine adjustments, this technique ensures consistent performance and prevents premature damage.

Conclusion

The Shimano FD-6700 front derailleur is a precise, high-performance component that rewards careful maintenance. Premature wear is usually caused by misalignment, poor lubrication, or environmental damage, all of which can be prevented through regular inspection and correct setup. By installing it accurately, maintaining clean pivots and cables, avoiding cross-chaining, and protecting it from harsh conditions, cyclists can extend the lifespan of their FD-6700 and enjoy smooth shifting for years.

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The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is a precision component designed for smooth, accurate shifting. However, it is also a derailleur that requires careful set-up and maintenance. Small errors during installation or adjustment can lead to poor performance, premature wear, or even component failure. This guide covers the most common mistakes riders and mechanics make with the FD-6700 [paid link] front derailleur and explains how to avoid them.

Incorrect Mounting Height

One of the most frequent mistakes with the FD-6700 [paid link] is mounting the derailleur cage too high above the big chainring. Shimano specifies a clearance of 1–3 mm. If the derailleur sits too high, shifting becomes sluggish and inconsistent. If it sits too low, the outer cage can rub against the chainring teeth, causing noise and unnecessary wear. Always measure carefully during installation and ensure the cage sits parallel to the chainring.

Ignoring Cable Tension Requirements

The FD-6700 is designed to work with Shimano’s specific cable pull ratio for 10-speed systems. Setting the cable tension incorrectly leads to delayed shifts or overshifts into the chain. Many riders mistakenly over-tighten the cable, which stresses the derailleur spring and can cause long-term damage. Correct tension should allow crisp movement without excessive force at the lever. Fine adjustments should always be made with the barrel adjuster, not by over-pulling the cable at the anchor bolt.

Improper Limit Screw Adjustment

Limit screws control the derailleur’s range of movement, preventing the chain from overshooting onto the crank arm or dropping into the bottom bracket. With the FD-6700, setting the low limit too tight often causes chain rub in the small chainring. Conversely, setting the high limit too loose risks the chain overshooting on the big ring. Riders who skip this fine-tuning step may experience frequent chain drops, which can damage both the derailleur and chainrings.

Mismatched Chainline and Crankset

The FD-6700 was engineered to pair with Shimano Ultegra 6700 cranksets, optimized for a 43.5 mm chainline. Using incompatible cranksets or bottom bracket spacers changes the chainline, forcing the derailleur to operate outside of its intended range. This results in chain rub, sluggish front shifts, and premature wear on the derailleur cage. Ensuring component compatibility is critical to avoid long-term shifting problems.

Neglecting Frame Support Requirements

The FD-6700 braze-on version relies on a rigid mounting surface. On some carbon frames, Shimano requires a support plate or reinforcement to prevent flex. Ignoring this requirement can cause the derailleur to bend under load, leading to poor shifts and possible frame damage. Riders should always check frame specifications before mounting to avoid structural issues.

Overlooking Chain Compatibility

The FD-6700 is designed exclusively for 10-speed drivetrains. Installing it with an 11-speed chain, which is narrower, causes inconsistent shifting and excess cage rubbing. Conversely, using a 9-speed chain, which is wider, leads to clearance problems. Always match the derailleur with the correct chain for optimal performance.

Improper Cable Routing

Many riders overlook the importance of cable routing under the bottom bracket. The FD-6700 relies on smooth, friction-free cable movement. If the cable housing is cut too short or routed at a harsh angle, increased friction leads to heavy shifting and cable wear. Regular inspection of the cable guide and housing is essential to keep shifting smooth.

Skipping Regular Maintenance

Even when set up correctly, the FD-6700 requires ongoing maintenance. Dirt buildup in the pivot points leads to stiffness and reduced spring return. Failure to clean and lubricate the derailleur at regular intervals shortens its lifespan. Applying light lubrication to the pivots and checking cable condition ensures long-lasting, precise shifting.

Forcing Shifts Under Load

The FD-6700 performs best when shifts are made with reduced pedaling force. Forcing a shift under heavy load can bend the cage or stress the mounting bolt. This mistake often occurs during climbs when riders attempt to move into the small ring too late. Training yourself to shift early and ease pedal pressure during shifts protects both the derailleur and drivetrain.

Using Incompatible Shifters

The FD-6700 front derailleur is tuned to work with Shimano 10-speed STI shifters from the same generation. Mixing it with later-generation 11-speed shifters results in mismatched cable pull, which prevents accurate shifting. Riders who attempt cross-compatibility often end up with unsolvable shifting issues. Always match the derailleur with the correct shifter series.

Conclusion

The Shimano FD-6700 front derailleur is a high-performance component when installed and maintained correctly. However, it is also unforgiving of setup errors. Mounting height, cable tension, limit screw adjustment, and component compatibility must be handled with precision. By avoiding these common mistakes, riders can keep their FD-6700 shifting smoothly and extend its service life significantly.

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The Shimano FD-6700 [paid link] front derailleur belongs to the Ultegra 6700 series, a 10-speed road groupset that was widely used for its reliable shifting and solid build quality. Riders who continue to run this derailleur often wonder if upgrading is possible, whether to a newer Shimano series or to improve performance within the existing 10-speed platform. This guide explores compatibility considerations, upgrade paths, and best practices for getting the most out of the FD-6700 [paid link].

Understanding the FD-6700 Front Derailleur

The FD-6700 [paid link] is a braze-on or clamp-style front derailleur designed for Shimano’s 10-speed road drivetrains. It features wide-link construction for rigidity, optimized for 10-speed chainrings with a 16-tooth maximum capacity difference. This model was engineered to pair with Shimano Ultegra ST-6700 [paid link] shifters and 10-speed double cranksets. Its shifting profile is tailored to narrower 10-speed chains and the chainring spacing typical of the 6700 groupset.

Compatibility with Drivetrain Generations

When considering an upgrade or replacement, compatibility across drivetrain generations is critical. The FD-6700 is specifically designed for Shimano 10-speed systems. It works best when paired with matching 10-speed Ultegra, 105 (5700 series), or Dura-Ace (7900 series) components. Using it with 9-speed or 11-speed setups introduces problems:

  • 9-speed systems: The chain and chainring spacing differ, leading to poor shifting and chain rub.
  • 11-speed systems: The derailleur cage shape and actuation ratio differ, which often prevents precise shifting.

For optimal performance, riders should stick to 10-speed groupsets. Attempting to mix across generations usually results in reduced accuracy and increased drivetrain noise.

Upgrading Within the 10-Speed Platform

If you want to improve performance without moving to a new speed standard, several options are available:

  • Dura-Ace FD-7900 [paid link]: Offers slightly crisper shifts with lighter materials, but the compatibility is seamless with 10-speed Shimano drivetrains.
  • 105 FD-5700 [paid link]: A more affordable option that provides similar performance to Ultegra, though with slightly heavier construction.
  • FD-6700-A Revision: Shimano later released a revised FD-6700-A version with minor improvements in shifting response, making it a subtle but worthwhile upgrade.

These options keep the drivetrain consistent while enhancing durability or shifting quality.

Considering an 11-Speed Upgrade

Cyclists looking for a bigger performance boost may consider moving to 11-speed drivetrains, such as Ultegra 6800, 8000, or newer series. However, the FD-6700 cannot be directly upgraded into these systems due to cage geometry and actuation ratio differences. A full front-end upgrade is required, including:

  • 11-speed STI shifters
  • Compatible crankset with 11-speed chainrings
  • 11-speed chain
  • 11-speed front derailleur (e.g., FD-6800 [paid link] or FD-R8000 [paid link])

This transition provides smoother shifting and improved chainline, but it requires replacing multiple components, making it a more costly upgrade path.

Best Practices for Maximizing FD-6700 Performance

Before replacing the FD-6700, ensure it is set up correctly and well maintained. Many riders replace parts prematurely when adjustments or maintenance would restore full function.

  • Proper Setup: Verify that the derailleur height and alignment match Shimano’s specifications. The outer cage should sit parallel to the chainrings with 1–2mm clearance above the teeth.
  • Cable Tension: Correct cable tension is essential for crisp shifts. Frayed or corroded cables should be replaced immediately.
  • Limit Screw Adjustment: Fine-tune the high and low limit screws to prevent overshifting or chain rub.
  • Regular Cleaning: Dirt buildup reduces performance. Cleaning the cage and lubricating the pivot points restores smooth operation.
  • Use of Genuine Chains and Chainrings: Mixing brands or models outside Shimano’s design often leads to reduced efficiency.

With proper care, the FD-6700 continues to perform reliably for many riders.

When Replacement Becomes Necessary

The FD-6700 is built to last, but like all mechanical parts, it will eventually wear out. Signs that indicate a need for replacement include excessive play in the pivots, cage deformation, or failure to hold alignment despite correct setup. If these occur, upgrading within the 10-speed platform or moving to an 11-speed system becomes the logical step.

Conclusion

Upgrading the FD-6700 front derailleur depends on your long-term goals. If you plan to stay with a 10-speed drivetrain, moving to a Dura-Ace FD-7900 [paid link] or the revised FD-6700-A offers improved performance without requiring major changes. If you aim for modern features and smoother shifting, a full upgrade to an 11-speed system is necessary. For most riders, however, careful setup, maintenance, and correct compatibility checks ensure the FD-6700 remains a dependable component for years.

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The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is well-regarded for its precise shifting and durability. However, many riders experience a derailleur that “feels off.” This typically shows up as sluggish shifts, chain rub, or inconsistent performance under load. Fortunately, most of these issues stem from setup errors or minor wear that can be corrected quickly. This guide explains why the FD-6700 [paid link] may feel misaligned and how to restore crisp, reliable shifting.

Understanding the FD-6700 Front Derailleur

The Shimano FD-6700 [paid link] is a braze-on or clamp-style front derailleur designed for 10-speed drivetrains. It uses a wide-link construction for improved rigidity and features a lightweight aluminum build. When properly adjusted, it delivers fast, accurate front shifts with minimal effort. Yet because of its precise tolerances, even small deviations in cable tension, alignment, or limit screw settings can compromise performance.

Common Reasons the FD-6700 Feels Off

Several factors can cause the FD-6700 front derailleur to feel poorly tuned:

  • Incorrect alignment: If the cage is not parallel to the chainrings or sits at the wrong height, shifting efficiency drops.
  • Cable stretch: Over time, derailleur cables lose tension, leading to sluggish or incomplete shifts.
  • Improper limit screw adjustment: Misadjusted screws either restrict cage movement or allow over-shifting, causing chain drops.
  • Worn components: A stretched chain, worn chainrings, or damaged derailleur cage can all mimic poor adjustment.
  • Frame flex or clamp slippage: On clamp-style versions, a loose clamp bolt can cause the derailleur to move slightly, upsetting alignment.

How to Instantly Improve FD-6700 Performance

Correct the Cage Alignment

The derailleur cage should sit 1–3 mm above the tallest chainring tooth. It must also be perfectly parallel to the chainrings. Even a small misalignment creates unnecessary friction and delayed shifts. Loosen the mounting bolt, adjust the cage position, and retighten firmly to the frame’s torque specification.

Reset Cable Tension

Cables naturally stretch after use, especially if the derailleur was recently installed. To restore proper tension, shift into the small chainring, release any slack, and use the barrel adjuster to fine-tune. A slight increase in tension often eliminates hesitation when shifting to the big ring.

Fine-Tune Limit Screws

The FD-6700 uses high and low limit screws to define the derailleur’s movement range. If the high limit is set too tight, the chain will struggle to move onto the large chainring. If the low limit is too loose, the chain may drop inside the small chainring. Adjust in small increments, testing shifts after each adjustment.

Inspect the Drivetrain

A derailleur cannot compensate for worn drivetrain parts. Check for chain stretch with a wear indicator and examine the chainrings for shark-tooth wear patterns. Replace components as necessary, since no amount of adjustment will correct a worn system.

Optimizing the FD-6700 for Better Performance

Once basic adjustments are complete, further refinements can maximize performance. Applying light lubrication to the pivot points reduces friction and improves responsiveness. Keeping the derailleur cage free of grime ensures clean, quiet operation. Riders seeking even smoother shifting may pair the FD-6700 with Shimano’s polymer-coated cables, which reduce drag within the housing.

Additionally, riders should check crankset compatibility. The FD-6700 was engineered for Shimano’s 10-speed road cranksets, and mixing it with non-matching chainrings may cause subpar shifting. Ensuring proper component pairing prevents misalignment and unnecessary frustration.

When to Consider Replacement

Even with perfect adjustment, a derailleur may eventually wear beyond repair. Signs include excessive play in the pivots, a bent cage, or a clamp that no longer holds securely. If shifting issues persist after thorough adjustment and inspection, replacement with a new FD-6700 or a compatible modern upgrade may be the best solution.

Conclusion

The Shimano FD-6700 front derailleur is a precise component that rewards careful setup. When it feels off, the root causes usually lie in alignment, cable tension, or limit screw settings rather than major mechanical failure. By methodically correcting these areas, riders can restore the crisp, accurate front shifting the Ultegra 6700 series is known for. Regular inspection, proper lubrication, and drivetrain compatibility checks ensure long-lasting performance and keep the FD-6700 running like new.

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The Shimano FD-6700 [paid link] Ultegra front derailleur is designed to deliver smooth, accurate shifting when installed and maintained correctly. However, over time, the shift cable can stretch, fray, or corrode, leading to sluggish or inconsistent front shifting. Replacing the cable on your FD-6700 [paid link] is a straightforward but precise task that ensures reliable performance. This guide covers everything you need to know about removing the old cable, installing a new one, and fine-tuning your set-up for optimal function.

Tools Required

  • 5 mm hex wrench
  • Cable cutters
  • Small flat-head screwdriver
  • New shift cable and housing (Shimano-compatible)
  • Cable end cap
  • Light grease or cable lubricant

Preparing the FD-6700 for Cable Replacement

Before removing the existing cable, shift the front derailleur into the small chainring position. This releases tension on the cable and makes removal easier. Inspect the derailleur body for dirt or corrosion, and clean the area around the pinch bolt. A clean working surface reduces friction and prevents contaminants from entering the new cable path.

Removing the Old Cable

To release the old cable, start by loosening the cable anchor bolt with a 5 mm hex wrench. Once loosened, pull the cable free from the derailleur’s pinch point. Next, remove the cable from the shifter by accessing the cable port—this is done by shifting the lever fully and guiding the old cable out through the shifter mechanism. Discard the worn cable and check the housing for any cracks, kinks, or corrosion. If damaged, replace the housing at the same time for maximum performance.

Installing the New Cable

Insert the new shift cable into the shifter, feeding it through the internal routing until it emerges cleanly on the opposite side. Apply a thin layer of light grease or cable-specific lubricant to the new cable before threading it through the housing. This step reduces friction and improves shifting longevity.

Feed the cable through the derailleur’s cable guide and position it under the anchor bolt. Pull the cable taut but do not overtighten. Secure it firmly by tightening the anchor bolt with a 5 mm hex wrench. Trim excess cable with cable cutters, leaving about 3–4 cm beyond the anchor point, and crimp a cable end cap to prevent fraying.

Adjusting Tension and Alignment

Once the new cable is installed, check derailleur alignment and adjust cable tension. Begin by fine-tuning with the barrel adjuster at the shifter. The FD-6700 [paid link] relies heavily on precise cable tension for accurate shifting between chainrings. Test the shifting by cycling through both chainrings, making sure the chain moves smoothly without hesitation or rubbing.

If shifting feels sluggish, increase tension slightly by turning the barrel adjuster counterclockwise. If the chain overshifts or rubs on the cage, reduce tension with a clockwise adjustment. Recheck both high and low limit screws to ensure the derailleur stops the chain correctly without overshooting.

Troubleshooting Cable Replacement Issues

If shifting remains inconsistent after cable replacement, recheck cable routing. The FD-6700 requires proper alignment with the frame’s cable guide for smooth function. A common mistake is failing to seat the cable head correctly inside the shifter, leading to slack or binding. Additionally, frayed cable ends inside the housing can increase resistance, so always install fresh cable housing when replacing a heavily worn cable.

Optimizing Performance After Replacement

Replacing the shift cable is not only about restoring basic function but also about maintaining peak performance. For the FD-6700, the best results come from using Shimano stainless steel cables with lined housing for reduced friction. Regular lubrication at the cable entry and exit points will extend the lifespan of both the cable and derailleur. Riders who frequently ride in wet or gritty conditions should schedule cable checks every few months to prevent premature wear.

Conclusion

Replacing the cable on your Shimano FD-6700 front derailleur is a critical step in maintaining precise shifting performance. By carefully removing the old cable, installing a fresh one with proper lubrication, and fine-tuning tension, you can restore your drivetrain’s efficiency and extend the life of your derailleur. Regular inspection and timely replacement ensure that your FD-6700 continues to deliver the crisp, reliable front shifting it was designed for.

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The Shimano Ultegra FD-6700 [paid link] front derailleur is a precise component designed to deliver crisp shifting performance. However, even the most advanced derailleur will perform poorly if its limit screws are not adjusted correctly. Proper limit screw adjustment prevents chain rub, eliminates overshifting, and ensures smooth transitions between chainrings. This guide explains how to fine-tune the FD-6700 [paid link]’s limit screws for optimal performance.

Understanding Limit Screws on the FD-6700 [paid link]

The FD-6700 features two limit screws, marked with an “L” and “H.” These screws control the derailleur’s lateral movement range. The low limit screw (L) sets the inner cage boundary to prevent the chain from dropping into the bottom bracket when shifting to the small chainring. The high limit screw (H) defines the outward boundary, preventing the chain from overshooting the big ring. If either screw is misadjusted, shifting accuracy will suffer and drivetrain wear may increase.

Tools Required

  • 2mm or 2.5mm hex key [paid link] (for limit screws)
  • 5mm hex key [paid link] (for cable pinch bolt if needed)
  • Bike stand [paid link] (recommended for stable adjustment)

Setting the Low Limit Screw

Begin by shifting the chain to the small chainring at the front and the largest cog at the rear. In this position, the derailleur cage should align closely with the chain but must not press against it. Turn the L screw clockwise to move the cage outward or counterclockwise to allow it to move inward. The correct setting leaves approximately 0.5–1mm clearance between the inner cage plate and the chain. This ensures smooth running without chain rub or risk of derailment.

Adjusting the High Limit Screw

Next, move the chain to the big chainring at the front and the smallest cog at the rear. Here, the derailleur’s outer cage plate should sit close to the chain, again with a 0.5–1mm gap. Adjust the H screw clockwise to restrict outward movement or counterclockwise to permit more travel. If the screw is too tight, the derailleur won’t shift onto the big ring. If it’s too loose, the chain may overshoot and fall off. Proper alignment guarantees quick, secure shifts.

Fine-Tuning for Smooth Shifting

Once both limits are set, test the shifting across the full range of chainrings and cogs. Pay special attention to diagonal gear combinations, such as the small chainring paired with smaller cogs, where chain rub is more likely. The FD-6700 includes a trim function via the STI levers, which can be used to eliminate minor rub. However, correct limit screw adjustment should reduce reliance on trimming. If rubbing persists despite correct limits, check cable tension, derailleur height, and alignment.

Common Mistakes to Avoid

Many riders mistakenly over-tighten the limit screws, restricting derailleur movement so much that shifts become sluggish. Conversely, leaving the screws too loose allows overshifting, which can damage the chain or chainrings. Another common error is adjusting the screws before ensuring the derailleur’s cage height and alignment are correct. The FD-6700 requires the cage to be parallel to the chainrings and positioned just 1–3mm above the tallest teeth for best results.

Troubleshooting Persistent Issues

If, after careful adjustment, the derailleur still hesitates or rubs, the problem may not be with the limit screws. Common culprits include insufficient cable tension, worn chainrings, or a bent derailleur hanger. In such cases, re-check installation parameters before re-adjusting limits. A correctly installed FD-6700 with properly set limit screws should deliver sharp, reliable shifts across the full drivetrain.

Conclusion

Proper limit screw adjustment is essential to unlocking the full performance of the Shimano Ultegra FD-6700 front derailleur. By carefully setting both the low and high screws, riders can ensure precise shifting, protect their drivetrain, and avoid frustrating chain drops or overshifts. Taking the time to dial in these adjustments will keep the FD-6700 operating at its intended high standard for many miles.

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The Shimano Ultegra FD-6700 [paid link] front derailleur is a precise and durable component, designed to deliver smooth shifting across double chainrings. However, like any mechanical part, it requires proper installation, adjustment, and maintenance to function correctly. Riders often encounter recurring issues that can compromise performance. This guide examines the most common problems with the FD-6700 [paid link] front derailleur and provides clear solutions to restore reliable shifting.

Poor Shifting Between Chainrings

One of the most frequent issues with the FD-6700 [paid link] is sluggish or incomplete shifting between the small and large chainrings. This usually stems from cable tension that is either too loose or too tight. Insufficient tension prevents the derailleur from moving far enough to engage the big ring, while excessive tension can cause overshifting. Correcting this involves fine-tuning cable tension with the barrel adjuster until the derailleur consistently moves the chain across both rings with minimal hesitation.

Chain Rub on the Front Derailleur Cage

Another common problem is chain rub on the inner or outer cage plates. This occurs when the derailleur is not properly aligned with the chainrings or when the trim adjustment has not been set correctly. Riders often hear a persistent noise in certain gear combinations. To fix this, the derailleur cage must be positioned parallel to the chainrings and set at the proper height above the largest chainring. Fine adjustments to the limit screws will help eliminate rubbing across the full gear range.

Incorrect Limit Screw Adjustment

Improper limit screw adjustment is a source of multiple issues. If the high limit screw is set too tight, the chain may fail to shift onto the large chainring. If it is too loose, overshifting and chain drop to the outside can occur. Similarly, a poorly set low limit screw can cause chain drop onto the bottom bracket shell or prevent the chain from engaging the small chainring. The solution is to carefully reset both limit screws, ensuring the derailleur stops precisely at the edge of each chainring without forcing the chain beyond.

Cable Friction and Stiff Operation

Over time, shift cables can corrode, fray, or develop friction inside the housing, leading to heavy lever feel and delayed derailleur response. On the FD-6700, this manifests as sluggish front shifts or the derailleur failing to return to its resting position. Replacing the cable and housing with high-quality, lubricated parts restores crisp shifting and reduces lever resistance. Regular inspection and replacement are essential for long-term reliability.

Derailleur Cage Deformation

In some cases, the derailleur cage can become bent or twisted due to a crash, impact, or excessive force during shifting. A misaligned cage disrupts the chainline and prevents precise gear changes. If the deformation is minor, careful realignment may restore functionality, but in most cases, replacing the derailleur is the best option to guarantee accuracy.

Noise and Vibration Under Load

The FD-6700 can sometimes generate noise under high pedaling torque, even when shifting is otherwise functional. This is often caused by insufficient tightening of the derailleur clamp bolt or a mismatch between the derailleur and chainring profiles. Ensuring that the clamp is secure and that the derailleur is compatible with the crankset configuration reduces vibration and eliminates most noise-related issues.

Compatibility-Related Problems

Although the FD-6700 was designed for use with Shimano Ultegra 10-speed drivetrains, some riders attempt to pair it with mismatched components. Using it with modern 11-speed systems, or with non-Shimano cranksets, can lead to poor shifting due to differences in chainline and chainring spacing. Ensuring compatibility with the correct chainrings, shifters, and chain is crucial for maintaining consistent performance.

Cable Anchor Bolt Slippage

If the cable anchor bolt is not torqued correctly, the cable may slip under load, causing a sudden loss of shifting precision. This results in the derailleur failing to reach the intended gear. Retightening the anchor bolt to the manufacturer’s torque specification resolves the issue and prevents recurrence.

Premature Wear of the Derailleur Mechanism

After extended use, the pivot points of the FD-6700 can wear, leading to play in the derailleur body and imprecise shifting. Lack of lubrication accelerates this process. Applying a light lubricant to the pivots and regularly cleaning the derailleur helps maintain smooth operation. In severe cases of wear, replacement is necessary to restore shifting accuracy.

Chain Drop During Shifts

Chain drop, whether to the inside or outside, is a frustrating problem. This usually results from a combination of poor limit screw adjustment, cable tension errors, and worn chainrings. Correctly setting the derailleur limits, keeping chainrings in good condition, and ensuring the derailleur height is optimal will minimize the risk of dropping the chain.

Conclusion

The Shimano Ultegra FD-6700 front derailleur is a reliable and precise component when properly set up and maintained. Most shifting problems arise from incorrect installation, poor adjustment, or worn parts. By addressing issues such as cable tension, limit screw settings, cage alignment, and compatibility, riders can restore smooth shifting and extend the service life of the derailleur. Regular inspection, cleaning, and lubrication ensure the FD-6700 continues to deliver the performance expected from Shimano’s Ultegra series.

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The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is known for precise and reliable front shifting. However, riders often experience noisy shifting if the derailleur is not installed or maintained correctly. This guide explains the exact causes of noise on the FD-6700 [paid link] front derailleur and how to restore smooth, quiet performance.

Understanding Noisy Shifting on the FD-6700

Noise from the FD-6700 [paid link] usually indicates friction between the chain and derailleur cage. Unlike rear derailleur issues, front derailleur noise is almost always linked to positioning errors, cable tension, or limit screw misalignment. Left unresolved, noisy shifting can accelerate drivetrain wear and reduce efficiency.

Tools Required

  • 5 mm Allen key
  • Phillips screwdriver
  • Cable cutters
  • Torque wrench [paid link]
  • Workstand (recommended)

Checking Front Derailleur Alignment

Correct derailleur positioning is the foundation of silent shifting. The FD-6700 requires precise alignment with the chainrings.

The outer cage plate must sit parallel to the chainring. Even a slight angle will cause rubbing and noise during shifting. Position the derailleur so that the bottom edge of the cage sits 1–3 mm above the tallest chainring tooth. If set higher or lower, noise will occur at certain gear combinations.

Setting Proper Cable Tension

Cable tension plays a central role in FD-6700 performance. If tension is too low, the derailleur will hesitate when moving the chain onto the big ring. Too much tension can push the cage excessively, causing chain rub.

Begin by releasing all cable tension. Then, pull the cable firmly by hand before securing it under the anchor bolt. Fine-tune tension with the barrel adjuster at the shifter, ensuring the derailleur moves crisply without overshooting.

Adjusting Limit Screws to Eliminate Noise

The FD-6700 features two limit screws that control cage travel.

  • Low limit screw (L): Adjusts the derailleur’s inward travel. If set too tight, the chain may rub in the small ring. If too loose, the chain may drop toward the bottom bracket.
  • High limit screw (H): Adjusts the derailleur’s outward travel. Incorrect adjustment here often causes chain rub in the large ring or even chain drop beyond the big ring.

Turn each screw in small increments while pedaling the bike on a stand. Noise should disappear once the cage is positioned correctly relative to the chain.

Using the FD-6700’s Trim Function

The Shimano FD-6700 front derailleur is designed with a trim feature to reduce noise. When riding in the large chainring with smaller cogs, or in the small chainring with larger cogs, the chain angle increases. This cross-chaining effect causes rubbing, even with correct adjustment.

By slightly pressing the left shifter, the derailleur moves to a secondary trim position. This micro-adjustment pulls the cage away from the chain, eliminating rubbing noises in extreme gear combinations. Understanding and using the trim function is essential for quiet operation.

Inspecting for Cable and Housing Wear

Over time, cables and housing deteriorate. A frayed cable or corroded liner increases friction, leading to delayed shifts and noisy cage movement. For the FD-6700, smooth cable action is critical, as it relies on precise tension to move accurately.

Replace worn cables and housing, ensuring proper lubrication before installation. This step often resolves persistent noise that adjustments alone cannot fix.

Chain and Chainring Wear Considerations

Noise may not always come from the derailleur itself. A worn chain or chainrings can mimic derailleur rub, especially under load. On the FD-6700, worn teeth can cause the chain to ride irregularly, producing vibration and noise.

Inspect the chain for elongation using a wear tool. Check chainrings for hooked or shark-tooth-shaped teeth. Replace worn components before making additional derailleur adjustments.

Compatibility and Set-Up Errors

The FD-6700 was designed for 10-speed drivetrains with specific chainring sizes. Installing it with mismatched cranksets or chains outside of Shimano’s compatibility chart can create alignment issues and constant rubbing.

Always pair the FD-6700 with compatible Shimano Ultegra, 105, or Dura-Ace 10-speed components. Incorrect combinations may shift but often generate excess noise.

Final Testing on the Road

Once adjustments are made, test shifting under real riding conditions. Noise that disappears on a workstand may reappear under pedaling force. Run through all gear combinations, using the trim feature where necessary, and confirm that shifting remains smooth and silent.

Conclusion

The Shimano FD-6700 front derailleur delivers reliable front shifting when installed and adjusted correctly. Noisy shifting is usually the result of cage misalignment, improper cable tension, or neglected limit screw adjustment. By following the steps above, riders can diagnose and eliminate noise while extending the life of their drivetrain. Proper use of the trim function and regular maintenance ensures the FD-6700 continues to perform quietly and efficiently for many miles.