Shimano Ultegra FC-R8100 Left Crank Arm - 165mm Black MFPN=21161 Durable hard anodized finish Rise

Durable hard anodized finish Rise 10 Material Aluminum Back Sweep (deg) 7 Upsweep 5 Bar Clamp Diameter (mm) 31

Replaceable and rebuildable parts

Misc RCT Remote

Can be fit with speed reducers and/or the XL brake

} Multi-directional fins that improve handlebar control while also maximizing comfort on rough terrain

Shimano Ultegra FC-R8100 Left Crank Arm - 165mm Black MFPN=21161 Durable hard anodized finish RiseThe Shimano Ultegra FC R8100 left crank arm features HOLLOWGLIDE structure that cuts weight yet maintains strength for better power transfer and quicker more precise front shifting. Crafted with anodized aluminum for for high strength and light weight Color Black Length 165 Spindle Interface Type Hollowtech II Size 165Mm