ARC MTB Hub NBK 4 Sealed Bearing Hub 28 / 32 / 36 Holes Mountain Bike Hub Disc brake Aluminum alloy Bicycle Hub 8 9 10 11 Speed. Its front and rear tube shaft four in one structure, elbow wheel hub. Equipped with NBK Bearing, equipped with black freehub, compatible with For SHIMANO HG 8-12 speed and SRAM NX 12S ，SX 12S.
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