Shimano FC-R8100-P power meter cover - Y0PW9801T

The Y0PW9801T Shimano cover is a genuine spare part designed for the Shimano Ultegra FC-R8100-P road crankset with power metre. Identified by Shimano as the system’s “Top cover”, it replaces the original cover on the crank arm fitted with the electronic unit.

This cover plays an important role in protecting and sealing the power meter’s control and charging area. It features openings that allow access to the pairing button and battery status indicator, whilst keeping the LED indicator visible.

Part number Y0PW9801T is specifically designed for the Ultegra FC-R8100-P crankset. It is therefore a replacement part intended to neatly restore a crankset whose cover is damaged, lost or worn.

Key features of the Y0PW9801T Shimano

• Genuine Shimano spare part.
• Shimano part number: Y0PW9801T.
• Compatible with the Ultegra FC-R8100-P crankset.
• Shimano part name: Top cover.
• Cover for the crankset’s electronic unit with power meter.
• Provides protection for the control and charging system area.
• Features openings for access to the button and LED indicator.
• Made of plastic.
• EAN: 4550170820480.
• Sold individually.

What is the Y0PW9801T cover used for?

The Y0PW9801T is not a component of the drivetrain: it is a protective cover for the electronic unit integrated into the Shimano FC-R8100-P crankset.

The Ultegra FC-R8100-P crankset incorporates a power meter and electronics that require access for recharging and control. The cover protects this area whilst allowing normal use of the system. Shimano officially lists the Y0PW9801T as part no. 20 in the exploded view of the FC-R8100-P.

In the distributor data sheets, the cover is also described as isolating the connector for the EW-EC300 charging cable whilst maintaining access to the pairing button and the status LED.

When should the power sensor cover be replaced?

Replacing the Y0PW9801T may be considered if the original cover is:

• cracked or broken;
• warped;
• lost;
• not properly secured to the crank;
• heavily marked or damaged;
• unable to provide adequate protection for the electronic components.

A damaged cover must not be ignored, as it helps to protect the electronics built into the pedal unit.