Shimano Deore XT HB-M8120-B Front Hub Reliability and Performance The Shimano Deore XT HB-M8210-B Front Hub offers improved reliability and performance. Steel cartridge bearings with pre-load adjustment and new seal designs mean less rolling resistance. This front hub is offered in a boost (110x15) configuration and both 28H and 32H conventional options. Features Cartridge bearings that are serviceable Smart seal design and smooth bearings mean less drag when coasting Available in both 28H and 32H drilling options SPECIFICATIONSHub Size15x110mm Spoke Interface J-Bend Hub Drilling28H, 32HBrake Type Centerlock | Shimano | Deore Xt Hb-M8210-B Front Hub 15X110Mm, 28 Hole, Centerlock