Chris King BMX Hubs Race-Ready. Precision Components. Racers who demand zero compromise out of the gate deserve a hub built to last. The BMX 6-Bolt Rear features the legendary 72-point Ring Drive(TM) for the quickest engagement but is also compatible with the 36T Ring Drive(TM) for lower drag and higher speed. A one-piece hardened stainless steel axle keeps the rear end stiff through every corner and sprint. The in-house angular contact bearings are fully serviceable and get faster with time. The 36-hole front runs the same large-diameter bearings as the MTB line, with wide, symmetric flange placement optimized for 20" rim geometry. Both hubs are engineered, machined and assembled in Portland, all covered by the King Lifetime Warranty. Features Ring Drive(TM) engagement system 72 points of simultaneous engagement stock for instant power transfer; swappable to 36T for reduced drag and higher top speed6-bolt rotor interface rear hub accepts standard 6-bolt disc rotors for BMX disc brake setups15x110mm thru-axle and M10 bolt-on compatibility rear hub fits current BMX thru-axle and traditional bolt-on standards20x100mm axle standard front hub built for 20mm BMX thru-axle forks36H spoke drilling both front and rear hubs drilled for 36-hole rims; flange diameter and angles optimized for 20" wheel builds In-house angular contact bearings user-serviceable without special tools; ceramic upgrade available for lower rolling resistance One-piece hardened stainless steel axle (rear) maximizes torsional stiffness across the rear end Made in Portland, Oregon, USA King Lifetime Warranty; engineered, machined, and assembled under one roof Specifications Position Front + Rear Set Front Axle Standard20x100mm Thru-Axle Rear Axle Standard15x110mm Thru-Axle / M10 Bolt-On Freehub Standard BMX 15x110mm thru axle and M10 bolt-on standards Spoke Count36HEngagement72 points of simultaneous engagement (Ring Drive(TM)); 36T ring set optional Bearing Type Angular Contact (in-house; ceramic upgrade available)Shell Material Aluminum Intended Use BMX Racing | Chris King | Bmx Hubs | Black | Front, 36 Hole, 100X20Mm