5DEV Super Boost Crank Spindle - 30mm x 139mm

5DEV Crank Spindles - precision made for perfect fit and power. CNC-machined premium 7075 aluminum and hard-anodized these spindles deliver rock-solid stiffness low weight and exact tolerances for smooth bearing interfaces and silent running. Multiple lengths let you dial Q-factor and chainline to your frame drivetrain and riding style.

ONLY compatible with 5DEV cranks

Precision-machined for optimal stiffness-to-weight and durability

Hard-anodized surfaces for wear and corrosion resistance

Easy swaps for setup changes or frame moves