5Dev eCranks Bosch R-SPEC
Best durable upgrade for e-bike riders tackling technical, rocky terrain.
Engineered to handle the rigors of aggressive trail riding, these crank arms prioritize clearance and durability. The low-profile geometry significantly reduces pedal strikes on technical terrain, allowing for cleaner lines and more efficient climbing on demanding e-bike setups.
$449.99
Who it's for
- Riders seeking premium craftsmanship and standout bike aesthetics
- Aggressive e-bikers demanding maximum power transfer efficiency
- Technical trail riders wanting to minimize pedal strikes
Who should skip it
- Budget-conscious cyclists prioritizing value over boutique manufacturing
- Weight-obsessed racers chasing the absolute lightest component setup
- Riders who prefer components that hide signs of wear
Performance breakdown
Ground Clearance
Optimized profile significantly minimizes pedal strikes on technical terrain.
Material Integrity
Aerospace-grade 7075-T651 aluminum offers exceptional strength-to-weight performance.
Installation Simplicity
Straightforward design ensures a quick, hassle-free swap for home mechanics.
Motor Compatibility
Precision-engineered specifically for seamless integration with Bosch and TQ systems.
Durability
Billet-machined construction withstands the high torque demands of e-bike riding.
Availability
High demand has currently left all sizes and colors sold out.
Key Specs
Crank Arm Length
155mm, 160mm
Material
7075-T651 Aerospace Aluminum Billet
Bottom Bracket Interface Type
IS Spline Drive
Q Factor
192mm
Weight
440g (160mm length)
Set Includes
Alloy steel crank bolt (8mm Hex, 40 Nm) and Billet aluminum self-extractor (16mm hex, 2Nm)
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