Rotor Round Ring Bcd110X4 39T (53&54) 12-11S Inner gel Two-piece design reduces weight

Two-piece design reduces weight

3mm (rear)

Optimized for aerodynamic bottle retention

enhancing the functionality of the Cateye magnetic security system

Compact inline form — suitable for bar end or inline placement

Rotor Round Ring Bcd110X4 39T (53&54) 12-11S Inner gel Two-piece design reduces weightFeatures bolt circle diameter: 110x4 mounting: inside shape: round sizes: 34 36 39 42 44 teeth combination options: 46 36T 50 34T 52 36T 53 39T 54 42T 55 42T 56 44T 58 44T material: aluminum compatible with all Rotor cranks with BCD110x4 Shimano Dura Ace FC R9200 Shimano Ultegra FC R8100 Shimano Powermeter for 11 12 speed