Aeffect R E-MTB Crank Arms - 2024

What Our Gearhead® Experts Are Saying:

"I recommend these for riders who want a tough, affordable alloy crank for Bosch-powered E-Bikes. They’re stiff, reliable, and hold up well to repeated impacts. For trail and enduro use, they’re a solid replacement or upgrade."

The Race Face Aeffect R E-Bike Crank Arms are engineered for the unique demands of modern E-Bike riding, where increased torque and sustained power output place added stress on drivetrain components. Purpose-built for Bosch Gen 4 Performance Line CX drive systems, they deliver consistent power transfer and dependable performance on steep climbs and technical descents.

Constructed from robust 7050 aluminum, the Aeffect R E-Bike crank arms balance stiffness, durability, and weight for aggressive trail use. The wide 194mm Q-factor enhances stability under heavy motor-assisted loads, while standard 9/16 pedal threads maintain compatibility with a broad range of trail and gravity pedals. Multiple crank length options allow riders to optimize fit and reduce pedal strikes in rocky terrain.

Recommended for trail, all-mountain, and enduro E-Bike builds, the Aeffect R E-Bike Crank Arms are a practical, hard-wearing choice for riders who demand confident power delivery and long-term reliability from one of the most critical contact points on their E-Bike.