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5Dev R-Spec 155mm crank arms for Bosch, TQ, and Avinox E-MTB motors
The 5Dev R-Spec Bosch E-bike Crank Arms run 155mm, which puts the pedal arc far enough off the ground to matter on the kind of technical lines where stock crank length becomes a liability. Billet machined from 7075-T651 aluminum on an IS Spline Drive interface, these are compatible with Bosch, TQ, and Avinox motors, and fit the 2025 Specialized Levo with its Gen 4 Brose system.
What Our Gearhead® Experts Are Saying:
"The IS Spline interface installs clean and the 155mm arm keeps pedal strikes out of the equation on technical rock sections where stock length cranks make you choose your line twice."
Details
- Short-travel E-MTB crank arm for technical trail riding
- 155mm length keeps the pedal arc clear on rock gardens
- 7075-T651 aluminum handles motor-assisted torque loads
- Fits Bosch, TQ, Avinox, and 2025 Specialized Levo motors
- IS Spline Drive interface for direct motor engagement
- Made in San Diego, California
- Item #FDV000N
- Arm Material
- 7075-T651 aluminum
- Arm Length
- 155mm
- Bolts
- Alloy steel crank bolt 8mm Hex
- Spindle
- Not included
- Q Factor
- 192mm
- Compatible Components
- Bosch/TQ/Avinox drivetrains, Specialized Gen 4 Levo
- Manufacturer Part Number
- EB-R155
- Includes
- Crank arms, hardware
- Activity
- Trail, Enduro