Machined to the tightest tolerances. All Onyx hubs come standard with ceramic hybrid bearings for extremely low rolling resistance so there is no need to upgrade.Torque Cap compatibleCeramic hybrid bearings7075 Aluminum Hub ShellAdjustable preloadTitanium boltsExtremely low rolling resistance5 year limited warrantyMade in the USAItem SpecificationsBearing TypeSealed CartridgeCenter to Flange, Left34.25Center to Flange, Right21ColorBlackDefined ColorBlackFlange Diameter, Left57Flange Diameter, Right57Front Axle15mm Thru x 110mmHub Drilling32Hub/Brake Compatibility6-Bolt DiscSpoke InterfaceJ-BendWeight209.2 ONYX Racing Products MTB Front Hub Front Hub