Shimano Ultegra FC-R8100 12-Speed Hollowtech II Road Crankset

Shimano Ultegra FC-R8100 12-Speed Hollowtech II Road Crankset Specifications Model No. FC-R8100 Series ULTEGRA R8100 Series Color Series color Average weight 711g (52-36T) / 700g (50-34T) Threaded bottom bracket shell width 70mm Yes Chainring combination 52-36T / 50-34T Compatible bottom bracket type Outboard Yes Crank fixing screw included Yes Crank arm length 160mm Yes Crank arm length 165mm Yes Crank arm length 170mm Yes Crank arm length 172.5mm Yes Crank arm length 175mm Yes Spider / Gear arms 4 HOLLOWGLIDE Yes HOLLOWTECH II Yes HOLLOWTECH crank arm Yes Optional chain guard Without chain/bash guard Yes Recommended bottom bracket Press-fit SM-BB72-41B Recommended bottom bracket Threaded (normal) SM-BBR60 Threaded bottom bracket shell width 68mm Yes Q-factor (mm) 148 Chain line (mm) 44.5 Compatible chain CN-M8100 P.C.D. (mm) 110 Rear speeds 12