Rims: EVO JP73 27.5" ETRTO 584-73 Inner width: 73mm Disc Brake Only Drilled for Schrader valve 32 holesFront hub: Novatec D201SB 15x150mm (Axle not included) 6-Bolt Disc Mount Sealed cartridge bearings (x2)Rear hub: Novatec D202SB 12x197mm (Axle not included) 6-Bolt Disc Mount Sealed cartridge bearings (x5) Compatible with 8-11 speed MTB (12 speed HG with 1.85mm spacer, not included)Assembled in North America by experienced wheelbuilders with Sapim stainless steel spokes (Black) and 14mm Brass Polyax Nipples (Black)