Race Face

Aeffect R E-MTB Crank Arms - 2024

What Our Gearhead® Experts Are Saying:

"I’ve run these on a Bosch Gen 4 Performance Line CX setup and they’ve been rock-solid under load. The stiffness is noticeable on steep climbs, and the shorter length options help a lot with pedal clearance in technical terrain. If you want a dependable alloy crank for hard E-Bike riding, this one just works."

When we’re muscling up punchy climbs and threading through rock gardens, the Race Face Aeffect R E-Bike Crank Arms keep our power smooth and controlled. Designed to handle the added torque of E-Bike riding, they bring a confident, planted feel that lets us focus on line choice instead of drivetrain stress. Clean, purposeful styling makes them feel right at home on modern trail and enduro E-Bikes.

Built from tough 7050 aluminum, these crank arms are optimized for Bosch Gen 4 Performance Line CX drive systems, delivering seamless motor integration and efficient power transfer. A wide Q-factor adds stability, while multiple crank length options help fine-tune fit and reduce pedal strikes on technical terrain. It’s a durable, no-nonsense solution for riders who push their E-Bikes hard.