Chris King Boost Rear Hub – 12 x 148mm 6-Bolt Micro Spline Black 28H. Boost rear hubs are designed as precision mountain tools. Featuring one-piece solid axles to provide a stiff hub that will help your suspension perform better and drive every watt of power into the dirt. To thwart mud water and contaminants as you power through rough trails Boost hubs have heavy-duty bearing seals and a threaded driveshell seal ring.

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