5Dev

Downhill Crank Spindle - 30mm x 145mm

The 5Dev Downhill Crank Spindle (30mm x 145mm) is a purpose-built 30mm spindle for riders who want a precise, serviceable way to set up 5Dev cranks for modern downhill drivetrains. CNC-machined from premium 7075 aluminum and finished with a hard-anodized surface, it delivers consistent bearing fit, long-wearing interfaces, and a clean foundation for dialing chainline and Q-factor when changing frames or build specs.

• 30mm spindle standard - Compatible with 30mm bottom brackets for common DH/enduro bearing formats and efficient power transfer
• 145mm downhill length - Designed to achieve a 56.5mm Downhill chainline for drivetrain alignment on DH-oriented frames
• 7075 aluminum, CNC-machined - High strength-to-weight material choice with tight machining tolerances for reliable crank and bearing interfaces
• Hard-anodized finish - Improves wear and corrosion resistance at high-contact surfaces for longer service life
• Setup flexibility - Makes it easy to swap spindles for frame moves, drivetrain changes, or targeted Q-factor/chainline adjustments
• 5Dev-only compatibility - Direct fit for 5Dev cranks; not intended for other crank systems