Surly Ultra New Disc Rear 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
• Spoke Interface: J-Bend
• Skewer Included: No
• Defined Color: Black
• Rear Axle: 10×1 Threaded x 135mm
• Color: Black
• Flange Diameter, Right: 58
• Flange Diameter, Left: 58
• Weight: 376
• Hub Drilling: 32
• Bearing Type: Sealed Cartridge
• Hub/Brake Compatibility: 6-Bolt Disc
• Cassette Body Type: Threaded Standard 1.37″ x 24tpi
• Center to Flange, Right: 38.5
• Center to Flange, Left: 34