Shimano XTR M9210 Hub The new XTR HB-M9210-B front hub offers improved reliability and performance. Stainless 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. The XTR FH-M9210-B rear hub offers improved reliability and performance through improved seal design and stainless-steel cartridge bearings with pre-load adjust, creating an easily serviceable and smooth-rolling rear hub. Lighter weight with improved engagement (max 3. 5 degrees), FH-M9210-B is available in 12x148 boost spacing and traditional 28h/32h drilled options. Features Quicker Engagement/less drag A 3. 5-degree engagement angle makes the FH-M9210-B fast off the line, while smart seal design and smooth bearings mean less drag when coasting. Conventional Drilling/Boost Spacing Available in conventional 148x12 boost spacing and traditional 28h and 32h drilling options. Cartridge Bearings X TR hubs are now available with easily serviceable stainless steel cartridge bearings. Rotation Cartridge bearings Optimized seal designs, and preload adjust keep the HB- M9210 consistently rolling smoothly. Drilling Options/Spacing Available in conventional 110x15 / 148x12 boost spacing and traditional 28h and 32h drilling options. | Shimano | Xtr M9210-B Cl Hub 28H 12X148