e*thirteen e*spec Race Carbon Crank Arm Set
Best lightweight upgrade for performance oriented electric mountain bike riders.
Engineered for high-performance electric mountain biking, these carbon crank arms offer a lightweight yet incredibly durable upgrade. The integrated self-extracting system simplifies maintenance, while the reinforced construction ensures they can handle the rigors of aggressive trail riding.
$389.95
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Who it's for
- Performance-focused riders seeking the lightest possible e-bike setup
- Cyclists who prefer a narrow stance for better ergonomic comfort
- Aggressive trail riders tackling rocky and technical terrain
Who should skip it
- Owners of e-bikes with less common or proprietary motor systems
- Aesthetic-focused riders who want their gear to look brand new
- Budget-conscious builders looking for a more economical replacement
Performance breakdown
Impact Resistance
World Cup DH-rated carbon layup handles aggressive rock strikes with ease.
Weight Efficiency
Significant weight savings over stock alloy cranks without compromising structural integrity.
Pedaling Ergonomics
The reduced Q-factor creates a more natural, efficient stance for riders.
Maintenance Ease
Integrated self-extracting bolt makes crank removal quick and frustration-free.
System Compatibility
Specifically engineered for Bosch CX Gen4 motors, ensuring a perfect fit.
Rigidity
High-strength carbon construction delivers excellent power transfer under heavy motor torque.
Key Specs
Material
Carbon
Weight
328 grams
Crank Arm Length
165 mm
Spindle Interface
ISIS
Pedal Thread
9/16 inch
Compatibility
Bosch CX Gen4 motors
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