1、The bicycle flywheel is made of high strength steel, high tensile steel plated with nickel and chromium, and adopts hardening technology, which has greater wear resistance, durability, high temperature resistance, corrosion resistance, rust resistance, no deformation, and impact resistance Good performance. 2、Toothless design, and strong compatibility. Independent small tooth wheel, the small teeth of the bicycle cassette flywheel are often used during use, and the independent small tooth design is convenient for future replacement and maintenance. 3、Provides fast and accurate indexing conversion function through special tooth contour and slope. Lost tooth design, irregularly shaped and irregular cut angle tooth contour, better compatible with various brands of gear divert chains, and shifts and shifts flexibly and smoothly. 4、The unique mountain bike chain design can well control the speed change function. The hollow design can easily reduce weight, reduce the burden of riding, and achieve a good balance between strength and weight. It is an ideal choice for reducing the weight of the bicycle. 5、Professionally manufactured, easy to install and use, it can directly replace old or damaged flywheels, excellent accessories for mountain bikes and road bikes, easy to install, without any adjustments to the transmission system, making riding more possible. Item Type: 10 Speed Bicycle Flywheel Material: High Strength Steel Speed: 10 Speed Number of Gear Teeth: 11-13-15-17-21-24-28-32-36-42T 1 x Bicycle Flywheel 2 x Gear Circle 1 x Lock Loop