By pairing a 10-45T or 10-51T cassette with 38T or 40T chainring, riders can choose closer gear steps or ultimate range depending on personal need. The FC-RX610-1 comes in 165, 170, 172.5, and 175 mm crank arm lengths, providing an additional level of customization.

Model No: FC-RX610-1

Series: GRX

Rear speeds: 12

Compatible chain: HG 12-speed

Chain line (mm): 49.7

P.C.D. (mm): 110