5Dev Cam Zink Signature Freeride Crank For Hardcore Riding Developed in collaboration with MTB legend Cam Zink, these cranks were made for the most unhinged freeride and downhill riders. Designed, engineered, and CNC-machined in San Diego, California, and tested and approved at the legendary Red Bull Rampage. Precision-machined from 7075 aluminum, these crank arms are built to take a beating. Features Developed in collaboration with MTB legend Cam Zink Designed for the most unhinged freeride and downhill rides Made from CNC-machined 7075 aluminum Available in 150mm, 155mm, and 165mm SPECIFICATIONSSpeeds9/10/11/12BB Compatibility-Chain Ring-Crank Arm Length150, 155, 165mm BB Spindle Interface-Chainring Material-Bolt Center Diameter (BCD)SRAM 8-Bolt Crank Arm Material7075 Aluminum Chainline Boost, Super Boost, DHBottom Bracket Included No Intended Use Freeride, Downhill Weight680g (165mm w/Boost Spindle) | 5Dev | Cam Zink Signature Freeride Crank | Raw | 165Mm | Aluminum