This is the SRAM 406 Race MTB 6-Bolt Rear Wheel. This great value MTB wheel consists of a SRAM 6-Bolt Disc, 32 Hole, 9mm QR Hub laced to a strong Mach 1 MX V Rim. This rim features a machined braking surface to help you stop when it matters most. Finished with Plain Gauge Stainless Steel Spokes.