Shimano FC-RX610 GRX Chainset 1x12 Speed

Array of options delivers optimal gravel gearing for variety of needs. The shimano fc-rx610-1 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding. 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.Features:- Optimal gearing for mixed-terrain riding- 10-45T and 10-51T cassette options serve array of riding stylesSpecifications:- Average weight: 791 (38T) 812 (40T)- Rear speeds: 12- Compatible chain: HG 12-speed- Chain line (mm): 49.7- P.C.D. (mm): 110- Spider/gear arms: 4- Chainring combination: 38T, 40T- Q-factor (mm): 151- Crank arm length (mm) 165: Yes- Crank arm length (mm) 170: Yes- Crank arm length (mm) 172.5: Yes- Crank arm length (mm) 175: Yes- Optional chain guard Without cha