Feature:1. Hardening Technology: The flywheel adopts hardening technology, with greater wear resistance, durability, high temperature resistance, corrosion resistance, rust prevention, no deformation, high durability and good impact resistance.2. Strong Compatibility: The high accuracy of the bicycle freewheel tooth shape, strong compatibility makes riding more possible.3. Hollow: The hollow design of flywheel can easily reduce the weight, reduce the riding load, achieve a good balance between strength and weight, and is easy to install and use. It is an ideal choice to reduce the weight of bicycles.4. Easy to Install: This flywheel is easy to install, professional manufacturing, direct replacement of old or damaged flywheel, excellent accessories for mountain bikes and road bikes.5. 6 Speed: Bicycle freewheel sprocket is made of high strength steel, 6 speed, the number of teeth is 14 16 18 21 24 28T.Specification:Item Type: Bicycle FreewheelMaterial: High strength steelGross Weight: 443g/15.6ozSpeed: 6Number of 6 Speed Teeth: 14-16-18-21-24-28T.Package List:1 xBicycle Freewheel