The ultimate in reliable & durable freehubs, from the ultimate BMX groupset, the Shimano MX71 DXR Rear Freehub uses angular contact bearings designed to cradle the balls giving both radial & lateral support for superior strength & durability in real world riding conditions. They also offer precision bearing adjustment & easy maintenance. 36-notch pawl engagement on the Freehub body for fast acceleration due to instant power transfer.