Front crankset Shimano GRX FC-RX810-1 172.5MM 1x11-speed 42T

SHIMANO's new FC-RX810-1 crank balances weight and efficiency for mixed-terrain riding. Gearing options cater for the specific demands of gravel riding and to maintain tighter gear steps for maintaining pedaling rhythm. It is offered in 40T and 42T chainring options and 170, 172.5, and 175mm crank arm lengths.Tighter gear steps maintain rhythm on familiar routesOptimum gearing for mixed terrains and riding stylesMODEL NO FC-RX810-1SERIES SHIMANO GRX 11-speedColor Series colorWeight: 656HOLLOWTECH II Technology Chain line (mm): 49.7Chainring combination: 4TCompatible Bottom bracket type: OutboardCompatible chain: HG-EV 11-speed, HG-X11Crank arm length: 172.5 mmCrank fixing bolt included Gear arms: 4HOLLOWTECH Technology P.C.D. (mm): 110Rear speeds 11Recommended Bottom bracket: Pressfit SM-BB72Recommended Bottom bracket: Threaded (normal) SM-BBR60Threaded bottom bracket shell width: 68 mm, 70 mmQ-factor (mm): 151