Hearing the increasing popularity of e-bikes, Race Face has answered the call by modifying our rock solid Aeffect crank arm specifically for e-bike. With increased clearance, while optimizing Q-factor, and a redesigned spline interface to maximize strength. The new Aeffect E-bike Crank is the perfect upgrade for the more discerning e-bike rider.Key FeaturesCompatible with all Bosch™ e-bike motors.,Optimized Q-Factor.,Extended spline interface for clearance of additional e-bike motor enclosures.,6066 T6 aluminium construction.,. Specification:Colour: Black.,Built For: XC / Trail / AM / Enduro.,Spindle Size: Bosch Compatible.,Weight: 499g.,Size: 165, 170, 175mm..