7 Speed hyper-glide freewheel from Shimano, ideal replacement for mountain and hybrid bikes. A reliable 7-speed screw-on freewheel. Hyper-glide gear sprockets ensure accurate and smooth shifting every time - up or down the gears. Compact and convenient unit for 7-speed gear systems. Multi-freewheel design means the whole unit is simply screwed onto a compatible hub. Suitable for a wide range of bikes. For use with mountain and hybrid bikes.