About the Race Face Atlas Cinch Crank Arm Crank arms forged and then machined from tough 7050 Alloy bracing that improves stiffness while cutting out unnecessary material and featuring their Cinch interface system for new levels of versatility. These cranks excel across many disciplines including trail, enduro and full on DH or freeride! Imagine interchangeable spiders, limitless ring combinations, a 30mm alloy spindle, and full compatibility across all relevant frame standards; all delivered with RF proven strength. Key Features Forged 7050 aluminum alloy arms. Bracing matrix for added stiffness. Super alloy 20% stronger than 7050 alloy. Removable spider offers. Interchangeable spindle. Race Face Instruction Manual Groupsets Buying Guide Please be aware that this item is not available on Cycle to Work Schemes.