The Miche X2 RD Chainring is part of Miche’s RD (Race Division) program, developed for riders who demand absolute efficiency from every watt they produce. Designed with competition in mind, the X2 RD ensures that power is transmitted with maximum precision, stiffness, and responsiveness.
At its core, the X2 RD features a CNC-machined AL 7075-T6 aluminium plate bonded to a structural 3K carbon layer, creating a unique composite solution that combines extreme rigidity with reduced weight. This construction delivers immediate power transfer, stable shifting performance, and a direct, race-ready ride feel.
The X2 RD range is divided into R92 (Dura-Ace specific) and R81 (Ultegra specific) versions. While sharing the same design philosophy, each version is optimized for its respective crankset to ensure perfect compatibility and performance. The chainring is also fully compatible with cranksets equipped with or without a power meter.
FEATURES
RD Race Division Engineering
Developed using Miche’s competition-proven design philosophy and manufacturing standards
Carbon + 7075 Aluminium Composite
Structural 3K carbon layer combined with CNC-machined AL 7075-T6 aluminium for maximum stiffness and low weight
Optimized for Shimano 12-Speed Systems
Full compatibility with Shimano Dura-Ace R9200 and Ultegra R8100 drivetrains
Power Meter Ready Design
Compatible with cranksets equipped with or without a power meter
Flexible Setup Options
Compatible with Miche R12 Inner Chainrings as well as original Shimano inner chainrings
PRODUCT POSITIONING
A high-performance race chainring designed for competitive road cycling and elite-level builds, prioritizing stiffness, efficiency, and precise power transmission.
RECOMMENDED RIDERS
Competitive road racers and performance-focused cyclists
Riders using Shimano Dura-Ace R9200 or Ultegra R8100 cranksets
Cyclists seeking maximum drivetrain stiffness and power transfer efficiency
Advanced users training and racing with power meter systems
SPECIFICATIONS
X2 RD R92 – Dura-Ace Version
Product Code: CGX2LB9
Speed: 12-speed
Material: 3K Carbon Fiber + AL 7075-T6 Aluminium (CNC machined)
BCD: 110 mm / 4-bolt
Weight:
50T (Power Meter Ready): approx. 126 g
50T (Standard): approx. 127 g
Available Sizes: 50 / 52 / 54 / 55 / 56T
Crank Compatibility: Shimano Dura-Ace FC-R9200
X2 RD R81 – Ultegra Version
Product Code: CGX2LB8
Speed: 12-speed
Material: 3K Carbon Fiber + AL 7075-T6 Aluminium (CNC machined)
BCD: 110 mm / 4-bolt
Weight:
50T (Power Meter Ready): approx. 126 g
50T (Standard): approx. 127 g
Available Sizes: 50 / 52 / 54T
Crank Compatibility: Shimano Ultegra FC-R8100
RD RACE DIVISION
RD (Race Division) represents Miche’s commitment to competition-level performance. Combining decades of engineering expertise with modern manufacturing technology, RD components deliver the same technical solutions validated and used by professional athletes—making elite performance accessible to dedicated cyclists worldwide.
