This crank is designed according to a fully-modular system. Comes with a 1x11-speed optimized Megatooth Direct Mount chainring. With forged 6061 aluminium arms and a 24 mm MegaExo chromoly steel spindle.
E-Bike rider also like tune the weight of their bikes. Therefor FSA has created the FSA Carbon crankarms for BOSCH E-Bike drive units. Made from aluminium that wrapped with carbon. For ISIS BB axle profiles.