Surly Ultra New Rear Hub - Threaded x 120mm Rim Brake Fixed/Free Silver 32H Brake Lever 8mm outer diameter (fits 42mm

8mm outer diameter (fits 42mm BMX head tubes)

5 ISO Width (mm) 64 ISO Diameter 584 / 650b / 27

Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity and slippery Silicone seals to produce minimum resistance

The larger 14-tooth X-SYNC lower pulley easily facilitates 11- to 50- and 10- to 50-tooth cassette capacity and also adds to NX Eagle's overall smooth-pedaling feel

Forged and CNC machined 6061/T6 aluminum cups

Surly Ultra New Rear Hub - Threaded x 120mm Rim Brake Fixed/Free Silver 32H Brake Lever 8mm outer diameter (fits 42mmSurly Ultra New Rear Hub Threaded x 120mm Rim Brake Fixed Free Silver 32H. Surly 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