The Shimano FD-5700 [paid link] front derailleur, part of the 105 groupset, is known for delivering precise shifting when installed and maintained correctly. However, like all mechanical components, it can suffer from common issues that affect performance. Understanding these problems and their solutions ensures smooth front shifting, longer component life, and consistent ride quality.
Improper Cable Tension
One of the most frequent issues with the FD-5700 [paid link] front derailleur is incorrect cable tension. Too little tension results in delayed or incomplete shifts to the large chainring, while too much tension can cause overshifting. Correct tension is essential for accurate shifting across the chainrings. To fix this, check the barrel adjuster on the downtube or inline adjuster, and make small turns until shifts are crisp and reliable. Riders should always verify final adjustments under pedaling load to ensure accuracy.
Misaligned Derailleur Cage
Another common problem is cage misalignment relative to the chainrings. If the derailleur is mounted too high, shifting becomes sluggish, and the chain may drop. If it is rotated at the wrong angle, the cage can rub the chain in several gears. For the FD-5700 [paid link], Shimano specifies that the outer cage plate should be parallel to the large chainring, with 1–3 mm clearance above the tallest teeth. Rechecking this alignment during installation prevents most shifting inconsistencies.
Chain Rub in Cross Gearing
Chain rub occurs frequently on the FD-5700, especially when cross-chaining. While some rub is expected in extreme gear combinations, excessive noise usually points to an incorrect limit screw setting or misadjusted trim position. The solution is to fine-tune the front derailleur’s inward and outward limit screws so the cage provides just enough clearance without allowing the chain to overshoot. Riders should also use the trim feature properly to minimize noise in certain gear ratios.
Sticky or Frayed Shift Cables
A sluggish or unresponsive FD-5700 derailleur often stems from cable friction or wear. Cables routed through old housing can stick, and frayed cable ends can catch at the derailleur pinch bolt. This results in inconsistent shifts or the inability to reach the large chainring. Replacing worn cables and housing restores crisp shifting and prevents future failures. Lubricating the cable during installation also improves long-term performance.
Incorrect Limit Screw Adjustment
Limit screw misadjustment is a major cause of chain drop on the FD-5700 front derailleur. If the low limit screw is too loose, the chain may fall off the small ring into the bottom bracket. If the high limit screw is not properly set, overshifting off the large ring is possible. Each limit screw must be precisely tuned: the low screw restricts inward movement, while the high screw restricts outward movement. Correct adjustment ensures the chain stays secure on both rings under load.
Excessive Dirt and Contamination
The FD-5700 relies on smooth pivot movement for accurate shifting. Dirt, old grease, and road grime can build up inside the pivots, causing sluggish response. Regular cleaning with a degreaser and light lubrication of the pivot points keeps the derailleur moving freely. Neglecting this maintenance often leads to poor shift quality and premature wear of the mechanism.
Chain and Chainring Wear
Sometimes shifting issues are incorrectly blamed on the FD-5700 itself, when the real culprit is worn drivetrain components. A stretched chain or worn chainring teeth make it difficult for the derailleur to guide the chain smoothly. If new adjustments do not solve poor shifting, inspecting the chain and chainrings is essential. Replacing these worn parts often restores shifting precision immediately.
Compatibility Problems
The FD-5700 is designed for 10-speed Shimano drivetrains and works best with matching shifters, chainrings, and chains. Using it with non-compatible components, such as 11-speed parts or different chainring profiles, can cause poor alignment and unreliable shifts. Riders should always confirm drivetrain compatibility when mixing parts to avoid unnecessary performance issues.
Loose Clamp Bolt or Mounting Issues
A less obvious but critical issue is a loose clamp bolt or improper mounting on the seat tube. If the derailleur body shifts under load, all other adjustments become ineffective. Checking torque on the clamp bolt and ensuring the derailleur is seated correctly prevents unwanted movement and maintains consistent shifting.
Conclusion
The Shimano FD-5700 front derailleur delivers excellent shifting when installed, adjusted, and maintained correctly. Most problems—such as poor cable tension, misaligned cages, limit screw errors, and contamination—can be solved with straightforward adjustments and regular upkeep. By understanding these common issues and applying precise fixes, riders can keep their FD-5700 operating smoothly for years of reliable performance.