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. Specifications Average weight 710 g HOLLOWTECH II Technology _ Threaded BB shell width_70mm _ Chain line (mm) 46.9 Chain ring combination 48-31T Compatible BB type_Outboard _ Compatible BB type Outboard Compatible chain HG-EV 11-speed, HG-X11 Crank Arm Length 170 mm, 172.5 mm, 175 mm Crank fixing bolt included _ Crank arm length (mm)_170.0 _ Crank arm length (mm)_172.5 _ Crank arm length (mm)_175.0 _ Gear arms 4 HOLLOWTECH Technology _ Optional chain guard_Without chain / bash guard _ Optional Chain Guard Without chain guard P.C.D. (mm) 110/80 Rear speeds 11 Recommended BB_Pressfit SM-BB72 Recommended BB_Threaded (normal) SM-BBR60 Threaded BB shell width_68mm _ Threaded BB Shell Width 68 mm, 70 mm Q-factor (mm) 151
