Wheel Master 20" Alloy BMX Rear WheelThis Wheel Master 20" Alloy BMX Rear Wheel comes equipped with a flip-flop hub for standard and micro freewheels. It has a sturdy double wall and a 3/8" axle, plus, it’s freewheel compatible. This sleek, black alloy wheel makes for an ideal replacement or upgrade with longevity.072774724628