5Dev

Downhill Crank Spindle - 29mm x 145mm

The 5Dev Downhill Crank Spindle (29mm x 145mm) is a precision replacement/upgrade spindle built to tune chainline and fit for modern gravity drivetrains. CNC-machined from premium 7075 aluminum and hard-anodized, it’s designed to deliver a clean bearing interface and consistent power transfer for downhill and bike-park abuse.

• 29mm x 145mm downhill-specific sizing - engineered to hit a 56.5mm Downhill chainline for DH frames and drivetrains
• SRAM DUB and 5DEV BB compatibility - fits SRAM DUB 28.99 and 5DEV 29mm bottom brackets for straightforward service and swaps
• Hard-anodized wear surface - improves corrosion resistance and helps maintain a smooth, quiet interface where the spindle meets the bearings
• CNC-machined 7075 aluminum - high strength-to-weight construction aimed at stiffness and long-term durability under heavy pedaling loads
• Easy setup changes - practical option for moving a crankset between frames or dialing Q-factor and chainline when builds change
• Crank compatibility note - only compatible with 5DEV cranks