SHIMANO SORA - Road Crankset 2x9-speedThe SHIMANO SORA 2x9 speed road crank uses a high-end 4-arm design and compact 50-34T chainrings and is available in 165, 170, and 175mm crank arm lengths.PRODUCT SPECIFICATIONSMODEL NO: FC-R3000SERIES: SORA R3000 SeriesColor: Series colorThreaded bottom bracket shell width (mm) 70: 2-PIECE CRANKSET: Chainring combination: 50-34TCompatible bottom bracket type Outboard: Crank fixing screw included: Crank arm length (mm) 165: Crank arm length (mm) 170: Crank arm length (mm) 175: Spider/Gear arms: 4Optional chain guard Without chain/bash guard: Recommended bottom bracket Press-fit: BB-RS500-PBRecommended bottom bracket Threaded (normal): BB-RS501Threaded bottom bracket shell width (mm) 68: Q-factor (mm): 150Chain line (mm): 43.5Compatible chain: HG 9-speedP.C.D. left / right (mm): 110P.C.D. (mm): 110Rear speeds: 9