R-SPEC eBike Crank Arms - Bosch/TQ/Avinox/Gen 4 Levo

Designed for aggressive e-MTB riding, the 5DEV R-SPEC eCranks deliver uncompromising strength, precision machining, and improved trail clearance across today’s leading e-bike motor platforms.

Machined in the USA from 7075-T651 aerospace-grade aluminium billet, these cranks are built specifically for Bosch, TQ, Avinox, and Gen 4 Specialized Levo motor systems, offering outstanding stiffness, durability, and long-term reliability. The R-SPEC low-profile design reduces bulk around the pedal interface to help minimise pedal strikes on technical climbs and rocky terrain — exactly where modern e-MTBs are pushed hardest.

Shorter crank lengths improve cadence efficiency and rider control, making these cranks an ideal upgrade for trail, enduro, and e-MTB riders looking to fine-tune their setup without compromise.

Whether you’re upgrading for performance, durability, or aesthetics, the 5DEV eCranks bring unmistakable CNC-machined style and proven strength to your e-MTB build.

Key Features

• R-SPEC crank design for maximum strength and ground clearance
• CNC-machined from 7075-T651 aluminium billet
• Short crank lengths to reduce pedal strikes and improve cadence
• Includes crank bolts and self-extracting hardware
• Made in the USA

Specifications

• Lengths: 155 mm / 160 mm
• Q-Factor: Approx. 192 mm
• Weight: Approx. 440–490 g (pair, length dependent)
• Material: 7075-T651 Aluminium
• Compatibility: Bosch, TQ, Avinox & Gen4 Specialized Levo eMTB systems
• Drive Interface: ISIS / IS Spline