SHIMANO GRX 610 crankset

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 styles Specifications: - 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 chain/bash guard: Yes - 2-Piece Crankset: Yes - Hollowtech crank arm: Yes - Compatible bottom bracket type Outboard: Yes - Recommended bottom bracket Threaded (normal): BB-RS501 - Recommended bottom bracket Press-Fit: BB-RS500-PB - Threaded bottom bracket shell width (mm) 68: Yes - Threaded bottom bracket shell width (mm) 70: Yes - Crank fixing screw included: Yes