Features： 1、High Performance: High tensile steel plates are plated with nickel chrome, with multi layer electroplating and anti rust treatment, the cassette has higher strength, strong durability and high wear resistance. 2、Smoother Shifting: High accuracy gear ratio and deficient gear design, the freewheel cassette has smoother shifting, weight reduction with large holes, and strong compatibility. 3、Hollow And Lightweight: The hollow design can easily reduce the weight of the bike cassette, making the riding lighter and smoother, giving you better riding experience. 4、Noise Free And Smooth Operation: The flywheel rotates steadily and without noise, ensuring a close connection with the bicycle hub and smooth operation. 5、Product Application: Professional manufacturing, it can directly replace your old or broken freewheel cassette, with 10 speed 11‑25T gear ratio, it is compatible with 10 speed road bicycle. Specification： Item Type: Bike Cassette Material: Nickel Chrome Steel Product Color: As Pictures Shown Product Weight: Approx. 285g / 10.1oz Gear Ratio: 10 Speed 11-25T (11-12-13-14-15-17-19-21-23-25T) Application: Suitable for Road Bicycle Package List： 1 x Flywheel 2 x Tooth Piece 1 x Cassette Lockring