The benchmark in Freeride and DH rated cranks, now lighter and stiffer Forged 7050 aluminum crank with web bracing to cut out unnecessary material Optimized crank clearance on 27.5 DH, 27+ and 29+ bikes Industry standard 30mm spline interface, CNC machined from 7050 alloy Futureproof proprietary Cinch system offers interchangeable spiders, limitless ring combinations, swappable width 30mm alloy spindles, and full compatibility across all relevant frame standards *BB sold separately, use RF291* for English 68/73mm, BB92 or PF30 BBs (BB cup spanner sold separately, use RF-2997) For use with Direct Mount ring or spider, attach using a Park BBT22 tool (use PK-5823, sold separately). Boost compatible spider also available, RF-3296 Made in Canada 792g with BB (175mm with 36t ring)