Boost rear hubs are designed as precision mountain tools. Featuring one-piece solid axles to provide a stiff hub that will help your suspension perform better and drive every watt of power into the dirt. To thwart mud, water, and contaminants as you power through rough trails, Boost hubs have heavy-duty bearing seals and a threaded driveshell seal ring.Canted flanges for stronger wheel buildsPatented RingDrive system with 72 simultaneously interfaced points of contact for unmatched hub engagementEasily serviceable with a T10 Torx and pick or pen knifeSpecifically designed for "BOOST" 148mm x 12mm axle standardEngineered, manufactured, and assembled in Portland, Oregon USA with King Lifetime WarrantyItem SpecificationsBearing TypeSealed CartridgeCassette Body TypeSRAM XDColorMatte JadeDefined ColorGreenHub Drilling28Hub/Brake Compatibility6-Bolt DiscRear Axle12mm Thru x 148mmSkewer IncludedNoSpoke InterfaceJ-Bend Chris King Boost Rear Hub Rear Hub UPC: 841529276053