Surly Ultra New Rear Hub - Threaded x 120mm Rim Brake Fixed/Free Black 32H MFPN=100539100-M/L - Constructed from high alloy

- Constructed from high alloy German chrome vanadium steel

The high-quality and unique AirCell-Rubber with its countless micro air bubbles provide very high damping offer a soft feel and reduce grip weight

Edge Control

For all standard 6 V / 3 W hub dynamos

Non-greasy skin lubricant that prevents chafing

Surly Ultra New Rear Hub - Threaded x 120mm Rim Brake Fixed/Free Black 32H MFPN=100539100-M/L - Constructed from high alloySurly Ultra New Rear Hubs Non Disc. Axle is quick release and bolt on compatible Stainless 6mm bolts are included; quick release skewer is NOT included 6061 T6 forged hub shell (same as the Surly New); 6901 bearings 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