Meet the 5DEV Cam Zink Signature Freeride Cranks - developed in collaboration with MTB legend Cam Zink 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 arms are built to take a beating. A purpose-driven cutout architecture adds material where it counts for brutal landings and removes it where it doesn&';t for snap on the run-in. The result: stomp-worthy stiffness on par with the burliest cranks without dead weight. PLEASE NOTE: Crank spindles are sold separately to accommodate specific individual size requirements (Cranks are only compatible with 5DEV spindles). Please note: Cranks spindles are NOT included with this product and must be purchased separately (Cranks are only compatible with 5DEV spindles) 7075 aluminum for elite stiffness-to-weight and impact resistance Designed with an optimized shape and length that features low-profile arms and smooth edges for ergonomics and fewer pedal strikes Reduced material around pedal boss for added ground clearance 8-bolt chainring interface and self-extracting hardware for easy service Get your spindles here! TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Number of Chainrings No Rings Included Chainring Interface Direct Mount SRAM 8-Bolt Color Black Crank Length (mm) 150 Crank Intended Use Mountain BB Included No Pedal Spindle 9/16" Defined Color Black