Surly -
Surly Ultra New Disc Front Hubs. 6061-T6 forged hub shell (same as the Surly New); 6901 bearings Axle is quick release and bolt-on compatible Stainless 6mm bolts are included; quick release skewer is NOT included 4130 CroMoly axle and stainless cones; agressive knurling on cones and bolt caps for reduced slippage New axle/cone system uses uses a specific shouldered axle that allows the hubs to be completely adjustment free and simple to service Hub Drilling: 32 Hub/Brake Compatibility: 6-Bolt Disc Color: Silver Center to Flange, Left: 22.8 Center to Flange, Right: 32.2 Flange Diameter, Right: 58 Defined Color: Silver Front Axle: QR x 100mm Flange Diameter, Left: 58 Weight: 280