Cog Material: Nickel-plated, Carrier Material: High Tensile Steel.which makes a good balance between strength and weight.
About the shifting performance, we designed our tooth profile dedicatedly and use a narrow-wide tooth design to avoid the chain drop when back-pedaling.
Professional manufacturing, directly replace your old or broken freewheel.Wonderful accessory for mountain bike and Road cycling.Easy installation, no need to make any adjustments to the transmission
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