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
| Color | Black |
| Flange Diameter, Left | 58 |
| Skewer Included | No |
| Rear Axle | 10x1 Threaded x 135mm |
| Flange Diameter, Right | 58 |
| Cassette Body Type | Threaded Standard 1.37" x 24tpi, Threaded Track |
| Center to Flange, Left | 34 |
| Bearing Type | Sealed Cartridge |
| Weight | 376, 378 |
| Center to Flange, Right | 38.5 |
| Spoke Interface | J-Bend |
| Defined Color | Black |
| Hub Drilling | 32 |
| Hub/Brake Compatibility | 6-Bolt Disc |
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