The Shimano PD-5800[paid link] pedals, part of the 105 series, are designed for smooth performance and reliable power transfer. Over time, however, the internal bearings can wear, leading to increased friction, noise, or play in the pedal body. Proper servicing or replacement of the bearings ensures continued efficiency and extends the life of your pedals. This guide provides a detailed, step-by-step explanation of how to replace or service the bearings in your Shimano PD-5800 pedals correctly.
Tools Required
- 17mm pedal wrench[paid link]
- 10mm hex key
- Shimano TL-PD40 cone tool (or suitable alternative)
- Small flathead screwdriver or pick
- Grease (Shimano or other high-quality waterproof bearing grease)
- Replacement bearing kit (Shimano part number Y42A98030 or equivalent)
- Torque wrench[paid link]
Understanding the Shimano PD-5800 Bearing System
The PD-5800 pedals feature a cartridge-type spindle bearing system, which combines cup-and-cone elements with precision cartridge bearings. The design offers smooth rotation and easy serviceability. Unlike sealed cartridge systems, the PD-5800 allows bearing preload adjustments and full disassembly for maintenance.
The internal structure includes:
- A spindle assembly housing the bearings and cone nuts
- A pedal body containing the bearing races
- A lock nut and dust cap securing the spindle
This modular system enables easy servicing without replacing the entire pedal body, making it both cost-effective and durable.
Removing the Pedal from the Crankset
Start by removing the pedals from the crank arms. Remember, the right pedal has a standard (clockwise) thread, and the left pedal has a reverse (counterclockwise) thread. Use a 17mm pedal wrench[paid link] or a 10mm hex key inserted at the back of the spindle. Loosen and remove both pedals carefully to avoid damaging the threads.
Once removed, clean the spindle area with a soft rag to prevent debris from entering the pedal mechanism during servicing.
Disassembling the Pedal Body
Place the pedal body on a clean work surface. Insert the TL-PD40 cone tool into the dust cap, which is located at the end of the pedal opposite the crank threads. Turn the tool counterclockwise to unscrew the cap. Inside, you’ll find the bearing preload nut and cone system.
Remove the lock nut and washer using a small wrench or socket, taking care not to lose the small parts. Carefully slide the spindle assembly out of the pedal body while keeping it level to avoid spilling any loose ball bearings.
Inspecting the Bearings and Races
With the spindle assembly removed, inspect the bearings and races inside the pedal body. If the bearings appear discolored, pitted, or rough, they should be replaced. The same applies if you detect wear or scoring on the bearing races.
If the pedal body races are damaged, the entire pedal may need replacement. However, if only the bearings are worn, a bearing kit can restore smooth operation effectively.
Clean all components thoroughly with degreaser and a soft brush. Allow them to dry completely before reassembly.
Replacing the Bearings
Apply a thin layer of fresh Shimano-approved waterproof grease to the bearing races inside the pedal body. Insert the new ball bearings carefully—there should be equal spacing and no overlapping.
Next, grease the spindle bearing surfaces and reinsert the spindle assembly into the pedal body. Ensure the spindle slides smoothly and seats properly. Avoid overfilling with grease, as excess may cause resistance or attract dirt.
Adjusting the Bearing Preload
Once the spindle is seated, reattach the cone nut and washer. Adjust the preload by turning the cone nut slightly until resistance is felt. The correct preload allows the spindle to rotate freely without side play.
After achieving the desired adjustment, reinstall the lock nut to secure the setting. Use the TL-PD40 tool to reinstall the dust cap, tightening it securely but not excessively. Shimano recommends a torque value of 3–5 Nm for this step.
Reinstalling the Pedals
Reapply a small amount of grease to the pedal threads before reinstalling them into the crank arms. This prevents corrosion and ensures easy removal later.
- Right pedal: tighten clockwise
- Left pedal: tighten counterclockwise
Use a torque wrench[paid link] to tighten each pedal to approximately 35–40 Nm.
Checking for Smooth Rotation
After reinstallation, spin each pedal by hand. They should rotate freely, with no grinding or lateral play. If any resistance or looseness is detected, remove the pedal and fine-tune the preload again until the rotation feels consistent and smooth.
Perform a short test ride to verify that both pedals engage and release correctly and that there are no noises or roughness during pedaling.
Maintenance Tips for Long-Term Performance
Regular maintenance is the key to keeping your Shimano PD-5800 pedals performing at their best. Shimano recommends servicing the bearings every 5,000–10,000 km depending on riding conditions.
To maximize lifespan:
- Wipe down your pedals after every ride to prevent debris buildup.
- Avoid pressure washing near the spindle area.
- Regrease bearings annually or after riding in heavy rain.
- Check for side play during routine bike maintenance.
By following these steps, you’ll prevent premature wear and ensure smooth pedal rotation for years of reliable performance.
Troubleshooting Common Bearing Issues
If your pedals develop noise, stiffness, or looseness after servicing, recheck the following:
- Excessive preload: Back off the cone nut slightly and retighten the lock nut.
- Loose lock nut: Ensure it’s firmly secured without altering the preload setting.
- Worn bearing races: Replacement may be necessary if roughness persists.
- Contaminated grease: Always use fresh, clean grease during assembly.
A properly serviced PD-5800 pedal should run silently and spin freely with no side play.
Conclusion
Servicing or replacing the bearings in your Shimano PD-5800 pedals is a straightforward process that restores efficiency and prolongs component life. With regular inspection and maintenance, these pedals can deliver smooth, consistent performance over thousands of kilometers. Whether you’re an experienced mechanic or a hands-on cyclist, proper bearing care ensures every ride feels as crisp and responsive as the first.