Race Face Aeffect R Crankarms
Best lightweight alloy upgrade for aggressive e-mountain bike riders.
These cranks finally bring a lightweight, performance-focused feel to the often heavy world of e-bikes. By trimming weight without sacrificing the durability needed for aggressive riding, they offer a rare balance of agility and strength. You get a confidence-inspiring, crash-backed upgrade that makes your electric rig feel significantly more nimble.
$104.99
at
Race Face
Who it's for
- Aggressive e-MTB riders needing components that handle high torque
- Technical trail riders wanting to minimize pedal strikes
- E-bike owners requiring reliable compatibility with major motor systems
Who should skip it
- Weight-conscious riders prioritizing a lighter bike build
- Style-focused cyclists preferring premium, high-end aesthetics
- Riders sensitive to wider stance widths for ergonomic comfort
Performance breakdown
Weight Efficiency
Remarkably light alloy construction sets a high bar for eMTB components.
Durability
Rugged build quality handles aggressive riding and heavy motor torque easily.
Clearance Optimization
Shorter crank options significantly reduce pedal strikes on technical terrain.
System Compatibility
Broad spline support integrates seamlessly with most major e-bike motor systems.
Warranty Coverage
Lifetime protection including crash damage offers unmatched peace of mind.
Ergonomic Feel
Refined shape promotes smooth, natural pedaling mechanics during long rides.
Key Specs
Motor Compatibility
ISIS (incl. Bosch Gen 2 and Gen 4), ETOR (incl. Fazua Ride 60), ISIS incl. Bosch SX
Includes
Pedal Washers
Crank Arm Material
7050 aluminum
Weight
485g (165mm arms only)
Crank Arm Lengths
165mm Arms Only (E-Bike Cranks)
eMTB Built
Built for compatibility constraints and increased loads/forces of full-power e-bikes.
Still have a question?
Ask Metto anything about the Race Face Aeffect R Crankarms before you decide.