ZTTO 9 Speed Cassette 11‑42T Mountain Bike Freewheel Cassette Sprocket for Road Bicycle

Feature: 1. The flywheel rotates steadily without noise, ensuring a close connection with the bicycle hub and smooth operation. 2. Made of high‑quality metal material, it has good corrosion resistance and heat resistance. 3. There is no need to worry about long‑term use of friction and heating, which will affect its service life. 4. With a hollow design, the weight is reduced, and it will not add too much burden to your bicycle when using it. 5. It has high strength, strong durability and abrasion resistance, compatible with 9‑speed mountain bike for HG system. Specification: Item Type: Freewheel Cassette Material: Chrome Molybdenum Steel (nickel plated surface treatment) Product Color: As Pictures Shown Product Weight: Approx. 625g 22.0oz Gear Ratio: 11 42T (11 13 16 20 24 28 32 36 42T) Compatibility: For 9 speed mountain bike for HG system. Package List: 1 x Flywheel2 x Sprocket1 x Flywheel Cover Note: After the installation is complete, check whether the flywheel is locked and whether it is aligned.