Shimano XT FH-M8110-B Rear Hub The new generation of XTThe new XT FH-M8110-BS Rear Hub features easy disc rotor installation using Shimano's Centerlock design, Shimano's new Microspline freehub design which is ready for the company's new 12-speed drivetrains, and 7 degrees of engagement providing faster acceleration which amplifies riding excitement. This hub features Boost rear spacing and the wide flange profileallows for the potential to build a wheel with zero dish. The XT FH-M8110-BS's cup and cone bearing system is durable and long-lasting providing you with a solid performing product for many years. Features Cup and cone bearing system7 degrees of engagement Microspline freehub equipped hub Centerlock disc mount Designed for Shimano 12-speed Wide flange profile allows the potential to build a wheel with zero dish Shimano Part Number:FH-M8110-BSSpecifications Hub spacing12x148mm (Boost)Spoke Count28HSpoke Orientation Straight-pull Disc Centerlock Freehub Microspline Flange Diameter51/68. 4mm Flange Distance55. 95mm Offset6. 78mm P. C. D. 45/61mm Weight307g | Shimano | Xt Fh-M8110-Bs Rear Hub 12X148Mm, 28 Hole, Straight Pull, Microspline