Front crankset Shimano GRX FC-RX810-2 172.5MM 2x11-speed 48x31T

SHIMANO's new FC-RX810-2 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. The 2x11-speed crank is available in a 48-31T chainring combination and 170, 172.5, and 175mm crank arm lengths.Gravel gear ratios preserve riding rhythm over rough surfaces with wider tires17T front rangeOptimum gearing for mixed terrains and riding stylesWider range front systemGear combination: 48-31TWeight: 710 gHOLLOWTECH II Technology Chain line (mm): 46.9Chainring combination: 48-31TCompatible Bottom bracket type: OutboardCompatible chain: HG-EV 11-speed, HG-X11Crank arm length: 172.5 mmCrank fixing bolt included Gear arms: 4HOLLOWTECH Technology dP.C.D. (mm): 110/80Rear speeds 11Recommended Bottom bracket: Pressfit SM-BB72Recommended Bottom bracket: Threaded (normal) SM-BBR60Threaded bottom bracket shell width: 68 mm, 70 mmQ-factor (mm): 151