X1 RD is the chainring designed for those who demand the maximum: lightweight, stiff, and capable of transferring every watt with absolute precision.
The R92 has been designed explicitly for Dura-Ace 9200 cranksets.
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: 297g
Speed: 12x
Material: Carbon and AL 7075 T6/CNC
PCD: 110
Holes: 4
Compatibility: X1 Shimano Dura-Ace R9200
Every Watt Matters
With X1 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.