The Shimano PD-6700[paid link] Ultegra pedals are designed for serious road cyclists who value smooth engagement, stability, and power transfer. However, even the best clipless systems can develop engagement or release problems over time due to wear, dirt ingress, or improper adjustment. This guide provides a detailed breakdown of how to identify, diagnose, and fix common issues specific to the Shimano PD-6700[paid link] pedal system.
Tools Required
- 8 mm hex wrench
- Small flathead screwdriver
- Torque wrench[paid link]
- Degreaser
- Clean lint-free cloth
- Shimano-approved grease
- Light lubricant spray
- Cleat wear indicator gauge (optional)
Understanding the Shimano PD-6700 Engagement System
The PD-6700 features a wide stainless-steel body plate with a spring-loaded binding mechanism that provides dual-sided engagement for SPD-SL cleats. Its adjustable tension system allows riders to customize release force. Over time, dust, grit, and moisture can affect the pedal’s internal spring tension and bearing function, leading to inconsistent clipping or unexpected release.
The pedal operates with three main components influencing engagement:
- Retention spring – Controls the release tension.
- Cleat interface plate – Provides the contact area with the cleat.
- Pedal spindle bearings – Ensure smooth rotation and consistent entry/exit feel.
Common Engagement Problems with the PD-6700
1. Difficulty Clipping In
Riders may struggle to engage the cleat fully when the retention spring tension is too high, or the mechanism is contaminated.
2. Unintentional Release During Sprints
This occurs when cleats are excessively worn or the spring tension is set too low, causing the pedal to release unexpectedly.
3. Creaking or Stiff Engagement
A stiff or noisy engagement often signals dirt in the spring mechanism or dry bearings.
4. Pedal Not Returning to Horizontal Position
The PD-6700’s weighted body normally auto-levels for easy entry. If it fails to do so, the internal bearings or pivot areas likely require lubrication or servicing.
Diagnosing Engagement and Release Issues
Begin by inspecting the cleat-to-pedal interface. Remove the shoe and visually check for uneven cleat wear. Worn edges can cause the cleat to sit incorrectly on the pedal, making engagement inconsistent.
Next, manually rotate the pedal body. It should swing freely and return to a horizontal position. If it feels stiff or sluggish, the internal bearings may be contaminated.
Finally, examine the spring mechanism. Look for corrosion, debris, or a lack of lubrication around the retention screw and spring housing. These signs often indicate the source of engagement failure.
Step-by-Step Troubleshooting and Fixes
Cleaning the Engagement Mechanism
- Remove the pedal from the crank using an 8 mm hex wrench.
- Spray degreaser around the binding mechanism to loosen grime and old grease.
- Wipe the area clean with a lint-free cloth.
- Apply a small amount of light lubricant to the spring pivot and retention screw area.
- Reinstall the pedal and check for smoother engagement.
Regular cleaning every 500–1000 km helps prevent the build-up that typically causes stiffness.
Adjusting Spring Tension
The Shimano PD-6700 features a tension adjustment screw at the rear of the binding. To fine-tune engagement:
- Increase tension: Turn the screw clockwise for a firmer release.
- Decrease tension: Turn it counterclockwise for an easier clip-in and release.
Always adjust both pedals evenly. Count the number of turns on each side to maintain symmetry. Test the feel after each quarter-turn adjustment.
For new cleats or riders preferring easier entry, start with lower tension. For sprinting or aggressive riding, higher tension provides more security.
Inspecting and Replacing Cleats
Shimano SPD-SL cleats have a built-in wear indicator. When the yellow or blue contact area becomes uneven or polished, replacement is due. Excessive cleat wear can lead to:
- Sudden disengagement during hard efforts.
- A loose or “floaty” pedal feel.
- Audible clicking or creaking noises while pedaling.
Replace cleats every 5000–7000 km for optimal performance.
Lubricating Bearings and Pivot Points
If engagement remains rough after cleaning and adjustment, service the pedal bearings:
- Remove the pedal body from the spindle.
- Clean the spindle threads and bearing area.
- Apply Shimano-approved grease to the bearings and pivot points.
- Reassemble, ensuring the pedal spins freely without play.
A torque wrench[paid link] can be used to reinstall the pedal at 35–40 Nm for proper tightness.
Fine-Tuning for Optimal Performance
After servicing, perform a dynamic test on the bike. Engage and disengage multiple times while stationary, then during a short ride. Observe for:
- Consistent engagement without slippage.
- Smooth, audible click-in sound.
- Stable cleat contact without lateral movement.
If engagement still feels inconsistent, recheck cleat bolt torque (set at 5–6 Nm) and ensure no debris is trapped under the cleat.
Preventing Future Engagement Issues
To maintain long-term reliability:
- Clean pedals regularly with mild detergent after wet rides.
- Avoid over-lubrication, as excess oil attracts dirt.
- Store the bike in a dry environment to prevent spring corrosion.
- Replace cleats before visible wear affects performance.
Regular inspection every few months will significantly extend pedal lifespan and preserve smooth operation.
Comparison with Similar Models
Compared to later Shimano SPD-SL models like the PD-6800 Ultegra or PD-R8000[paid link], the PD-6700 has a slightly narrower body and less refined bearing seals. However, it remains highly durable and easily serviceable. Newer models offer improved weight savings and sealing but use nearly identical engagement principles—making the PD-6700 fully capable of high-performance use when properly maintained.
Compatibility Notes
The PD-6700 is compatible exclusively with Shimano SPD-SL cleats, available in three float options (yellow 6°, blue 2°, and red 0°). It is not compatible with SPD mountain cleats or Look Keo-style systems. For best results, pair with Shimano Ultegra or Dura-Ace road shoes featuring a three-bolt sole pattern.
Conclusion
Engagement issues in Shimano PD-6700 pedals usually stem from dirt accumulation, incorrect spring tension, or worn cleats. Regular cleaning, correct tension adjustment, and timely cleat replacement are the keys to maintaining optimal pedal performance. When maintained correctly, the PD-6700 offers precise engagement, durable construction, and reliable performance suited for both training and racing applications.