The Shimano FD-6700 [paid link] front derailleur, part of the Ultegra 6700 series, is designed for precision shifting and durability. However, like any mechanical component, it requires consistent maintenance to perform at its best. Neglecting routine care can result in poor shifting, premature wear, and costly replacements. This guide provides a detailed maintenance plan to help you keep your FD-6700 [paid link] front derailleur running smoothly for years.
Understanding the FD-6700 Front Derailleur
The Shimano FD-6700 [paid link] front derailleur was engineered for 10-speed drivetrains, offering crisp shifting between chainrings. It uses a wide-link design for improved rigidity and features optimized geometry for efficient movement. While the unit is highly reliable, dirt, cable friction, and misalignment can compromise performance over time. Establishing a structured maintenance routine is essential for long-term reliability.
Tools Required
- 5mm hex wrench
- Phillips screwdriver
- Cable cutters
- Torque wrench [paid link]
- Chain cleaning tool
- Degreaser
- Chain lubricant
- Light grease
Routine Inspection and Cleaning
To maintain consistent shifting, the FD-6700 should be inspected and cleaned regularly. Dirt, road grime, and sweat can accumulate on the derailleur cage, increasing friction and reducing accuracy.
Wipe down the derailleur with a clean cloth after every few rides, especially in wet or dusty conditions. Use a mild degreaser for a more thorough cleaning, ensuring that no residue remains. Pay particular attention to the pivot points of the derailleur, as these are prone to seizing if not kept clean and lightly lubricated.
Lubrication of Pivot Points
The pivot points on the FD-6700 are crucial to smooth movement. Over time, they can dry out or collect debris, leading to stiff operation. Apply a small drop of light lubricant to each pivot, then cycle the derailleur by shifting through the gears to distribute the oil evenly. Avoid excessive lubrication, as excess oil will attract dirt and shorten service intervals.
Cable and Housing Maintenance
Cables and housing have a direct impact on the shifting quality of the FD-6700. Friction caused by worn or dirty cables can make the derailleur feel sluggish or unresponsive. Inspect the cable regularly for fraying, corrosion, or dirt buildup. If the cable shows signs of wear, replace it immediately with a high-quality stainless-steel version.
Lubricate the cable lightly before installation and ensure the housing is cut cleanly with no deformed ends. Proper cable tension should be checked after replacement to guarantee crisp shifting.
Chainring and Chain Compatibility Checks
A well-maintained derailleur cannot compensate for a worn chain or chainrings. The FD-6700 was designed to pair with Shimano Ultegra 6700 chainrings, optimized for precise ramp and pin engagement. Regularly inspect the teeth of your chainrings for wear, burrs, or damage. A worn chain should be replaced before it accelerates wear on the chainrings and derailleur cage.
Maintaining proper drivetrain compatibility will prevent chain rub and inconsistent shifts, extending the service life of your derailleur.
Adjustment Verification
Even when the derailleur is clean and lubricated, misadjustment can cause problems. Periodically check the high and low limit screws to ensure they are correctly set. The low limit screw should position the cage just outside the chain when in the small chainring, while the high limit screw prevents the chain from overshifting off the big chainring.
Cable tension should be fine-tuned with the barrel adjuster. A slight increase in tension will sharpen shifts to the big ring, while a small reduction smooths the return to the small ring. These small adjustments should be checked regularly to keep the system in balance.
Seasonal Deep Service
In addition to routine cleaning, a deeper seasonal service is recommended every six months or approximately every 3,000–4,000 km. During this service, remove the derailleur from the frame, clean it thoroughly, and inspect for wear on the cage plates. Check the mounting bolt and clamp band for proper torque and inspect the derailleur hanger or braze-on mount for alignment issues.
Re-grease the clamp bolt threads before reinstalling, and reapply fresh lubrication to all pivot points. A full reset of cable tension and limit screws should follow to restore factory-level [paid link] precision.
Troubleshooting Common Maintenance Issues
If shifting feels rough despite regular cleaning, cable friction is the most likely cause. Replace the inner cable and housing to restore smooth performance. If the derailleur cage rubs the chain in certain gears, verify alignment and limit screw settings. Persistent misalignment may indicate a bent derailleur mount, requiring professional attention.
Another common issue is noise under load, often caused by chainring wear or incorrect derailleur height. Ensure the derailleur cage sits 1–3 mm above the tallest chainring teeth for optimal performance.
Extending the Lifespan of the FD-6700
Consistent care and attention to detail will greatly extend the life of your FD-6700. Avoid cross-chaining whenever possible, as this puts unnecessary strain on the derailleur cage. Store the bike in a dry environment to prevent corrosion, and clean salt residue immediately after winter rides.
A proactive approach ensures that the derailleur continues to shift with the precision expected from Shimano’s Ultegra line, delaying the need for replacement parts and maintaining a reliable drivetrain.
Conclusion
The Shimano FD-6700 front derailleur is a precise and durable component when properly cared for. Regular inspection, cleaning, lubrication, and adjustment are essential for keeping it in top condition. By following this structured maintenance plan, you can enjoy flawless front shifting performance and significantly extend the service life of your derailleur.