Miche X2 RD R81 Ultegra Chainring 50T Power Meter

X2 RD is the chainring designed for those who demand the maximum: lightweight, stiff, and capable of transferring every watt with absolute precision.

The R81 is designed for Ultegra 8100 cranksets with three dedicated configurations: 50, 52, and 54 teeth, while maintaining the same design philosophy.

Both are compatible with Miche R12 inner chainrings as well as original Shimano ones, giving riders different setups.

The essence of this chainring lies in its meticulous engineering and the incredible attention to detail we have always put into our products: a CNC-machined AL 7075-T6 aluminum plate merges with a structural 3K carbon layer, creating a unique synergy that delivers extreme stiffness, lightness, and top-level responsiveness in power transmission.

Specifications

• Weight: 126g
• Speed: 12cx
• Material: Carbon and AL 7075 T6/CNC
• PCD: 110
• Holes: 4
• Compatibility: Shimano Ultegra R8100

Every Watt Matters

• With X2 RD, it’s not just about pushing harder: it’s about maximising every single watt you produce, transforming energy into speed, and feeling the difference with every pedal stroke.
• Every watt saved is not just efficiency: it’s time, it’s performance, it’s results.