Surly Ultra New Front Hubs, Non-Disc. Features: 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 Specifications: Position: Front Brake Type: Rim Brake Axle Type: Bolt-On Hub Spacing: 9 x 100mm Drive Type (Rear Hub): - Spoke Count: 32H Spoke Type: J-Bend Left Side Flange Diameter: 54mm Right Side Flange Diameter: 54mm Left Side Center to Flange: 32.2mm Right Side Center to Flange: 32.2mm Bearing Type: Sealed Cartridge Color: Silver Weight: 230g