Six gears of the TZ21 freewheel ensure a smooth transition when shifting up or down the block.
Top Features of the Shimano MF-TZ21 7-Speed Multiple Freewheel:
A reliable 7-speed screw-on freewheel
Engineered for smooth chain movement up or down the block
For 6-speed gear systems
Can be easily installed onto compatible screw-on type hub
Suitable for mountain bikes and a wide range of other cycles