Shimano Ultegra FC-R8100 Left Crank Arm - 170mm Black MFPN=BKCJ-0195 }SRAM Red(pre-2012) /Force BB30/PF30 Left

}SRAM Red(pre-2012) /Force BB30/PF30 Left Crank Arm Bolt and Cap M18/ M30

Stock thru axles are not able to accommodate axle mounted hitch systems

440% range gives the coverage 1x gravel riders want

Durable 2-pc forged aluminum 4-piston caliper with titanium hardware for corrosion resistance and light weight

BCD Direct Mount Crank Arm Length 150mm Interface ISIS Position Set Primary Color Black

Shimano Ultegra FC-R8100 Left Crank Arm - 170mm Black MFPN=BKCJ-0195 }SRAM Red(pre-2012) /Force BB30/PF30 LeftShimano Ultegra FC R8100 Left Crank Arm 170mm Black. The 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 TECH SPECS Color Black Length 170 Spindle Interface Type Hollowtech II