The Shimano FC-R8100-P [paid link] is a high-precision power meter integrated into the ULTEGRA R8100 series crankset, offering accurate power measurement for serious cyclists. Proper installation, adjustment, and maintenance are crucial to ensure optimal performance and longevity of this component.
Installation of the FC-R8100-P [paid link]
Preparation:
Before beginning the installation, ensure that your bicycle frame is compatible with the FC-R8100-P [paid link] crankset and that the bottom bracket shell is clean and properly faced. Gather all necessary tools and components, including the crankset, magnet, magnet cover, double-sided adhesive, charging cable, preload tool, and non-drive side cover.
Tools Required:
- 1.5 mm hexagon wrench
- 5 mm hexagon wrench
- 8 mm hexagon wrench
- 17 mm spanner
- Soft face mallet
- Magnet setting tool
- TL-FC16 [paid link]/TL-FC18 (crank arm installation tools)
- TL-FC24 & TL-FC32 [paid link] or TL-FC25 & TL-FC32 [paid link] (bottom bracket installation tools)
Step-by-Step Installation:
- Install the Bottom Bracket:
- Apply grease to the threads of the bottom bracket cups.
- Use the appropriate tools (e.g., TL-FC24 & TL-FC32 [paid link]) to securely install the bottom bracket into the frame. Ensure that the bottom bracket shell is parallel to prevent any shifting performance issues.
- Install the Magnet:
- Place the magnet into the magnet cover and attach the double-sided adhesive to the cover.
- Utilize the magnet setting tool by inserting it into the right side of the bottom bracket.
- Position the magnet cover on the frame such that the distance between the tool’s tip and the magnet is 5 mm or less. Once positioned correctly, adhere the magnet cover to the frame.
- Install the Crankset:
- Insert the right crank arm (drive side) into the bottom bracket. Ensure that the spindle cover remains on during this process to protect the electronics.
- Apply grease to the spindle and the splines at the end.
- Attach the left crank arm (non-drive side) onto the spindle.
- Use the preload tool to set the bearing preload by tightening the preload cap to a torque of 0.7 – 1.5 Nm. Ensure that the groove on the tool aligns with the groove on the crank arm to avoid pinching the electric wire.
- Connect the electric wire from the left crank arm to the spindle connector. Align the lever on the connector with the groove in the left crank arm and push it in securely.
- Insert the stopper plate and tighten the left crank arm bolts alternately to a torque of 12 – 14 Nm.
- Attach the non-drive side cover by aligning it correctly and pressing it onto the crank arm.
Adjustment of the FC-R8100 [paid link]-P
Zero Offset Calibration:
Performing a zero offset calibration ensures the accuracy of the power meter.
- Preparation:
- Place the bicycle on level [paid link] ground.
- Ensure no load is applied to the crank; do not place feet on the pedals during calibration.
- Calibration Process:
- Position the crank arms vertically, perpendicular to the ground.
- Press and hold the button on the control unit until the LED lights up blue, then release the button. The LED will begin blinking, indicating that the zero offset calibration is in progress.
- Once the calibration is complete, the LED will stop blinking.
Maintenance of the FC-R8100 [paid link]-P
Regular Maintenance:
- Cleaning:
- Keep the crankset clean by wiping it down with a damp cloth after rides, especially in wet or muddy conditions.
- Avoid using high-pressure water jets, as they can force water into bearings and electronic components.
- Lubrication:
- Periodically apply appropriate lubricant to the chainrings and chain to ensure smooth operation.
Firmware Updates:
Regularly updating the firmware ensures optimal performance and accuracy.
- Using E-TUBE PROJECT Cyclist:
- Download and install the E-TUBE PROJECT Cyclist app on your smartphone.
- Activate the power meter by pressing the button on the control unit or rotating the crank.
- Ensure Bluetooth® LE is enabled on your smartphone.
- Open the app and connect to the power meter by selecting its unit name.
- Follow the on-screen instructions to check for and install firmware updates.
Battery Maintenance:
- Charging:
- Connect the charging cable to the charging port on the crank arm.
- Plug the other end into a compatible USB adapter or computer.
- The LED will light up blue during charging and turn off once fully charged.
- Battery Level [paid link] Check:
- Press the button on the control unit; the LED will indicate the battery level [paid link]: