Industry Nine Hydra Classic mountain hubs are loaded with features every rider will appreciate such as revolutionary 0.52 engagement, generously low weights and an intuitive layout that can be serviced without any proprietary tools.From turning and milling bar stock 7075-T6 aluminum for shells, axles and encaps, wire EDM cutting A2 tool steel for pawls and driverings, to in-house anodization lab, every step of design, engineering, manufacturing and assembly is done to exacting standards in Asheville, NC690 P.O.E. Hydra Freehub body engages every .52 degrees yeilding telepathic controlClassic j-bend spoke interfaceSteel cartridge bearings are durableEasily serviced with no proprietary tools; Designed to keep you in the saddle and out of the service queueItem SpecificationsBearing TypeSealed CartridgeCenter to Flange, Left27Center to Flange, Right42ColorBlackDefined ColorBlackFlange Diameter, Left58Flange Diameter, Right45Front Axle15mm Thru x 110mmHub Drilling32Hub/Brake Compatibility6-Bolt DiscSpoke InterfaceJ-BendWeight165 Industry Nine Hydra Classic Front Hub Front Hub UPC: 810098980036