Features of the SRAM 900 Rear Hub 28H 6-Bolt Disc Sealed cartridge bearings Angled flanges provide optimum spoke geometry Axle end caps for alternate frame Specs Are included (except for Boost hubs) and can be swapped without tools Skewer Included, No Rear Axle, 12mm Thru x 148mm Weight, 285 Center to Flange, Right, 23.5 Flange Diameter, Left, 58 Flange Diameter, Right, 60 Center to Flange, Left, 37.25 Hub/Brake Compatibility, 6-Bolt Disc Bearing Type, Sealed Cartridge Defined Color, Black Cassette Body Type, SRAM XD 11/12 Speed Color, Black Hub Drilling, 28 Spoke Interface, J-Bend