Bike 9 Speed Cassette Corrosion Resistant Mountain Bike Freewheel Cassette Sprocket Suitable for Mountain Bike Road Bike Durable Long Time Use 11‑42T

[Practical Accessory]: The 11-42T mountain bike freewheel can be used as an accessory to replace the worn or damaged original freewheel of your bicycle, so you can make your bicycle move more smoothly. [Guarantee]: If you are not satisfied with the item you received, you can always send us an email. We will reply you immediately and help you solve the problem. [Stable Performance]: Bike 9 SpeedCassette has gone through a detailed manufacturing process, has very stable performance, and can be closely connected with the bicycle hub for smooth and noise-free riding. 【Wearable】: The flywheel of this mountain bike has good wear resistance, so you don't have to worry about friction or heating that will affect its service life. It can accompany you for a long time. [Compatibility]: The gear ratio of the bicycle flywheel is 11-42T (11-13-16-20-24-28-32-36-42T), compatible with HG system 9-speed mountain bikes. . function: 1.【Wearable】: The flywheel of this mountain bike has good wear resistance, so you don't have to worry about friction or heating that will affect its service life. It can last you a long time. 2.【Stable Performance】: Bike 9 SpeedCassette has undergone a detailed manufacturing process, has very stable performance, can be closely connected with the bicycle hub, and has smooth and noise-free riding. 3.【Compatibility】: The gear ratio of the bicycle flywheel is 11-42T (11-13-16-20-24-28-32-36-42T), compatible with 9-speed mountain bikes. HG system. 4.【Practical Accessory】: The 11-42T mountain bike freewheel can be used as an accessory to replace the worn or damaged original freewheel of your bicycle, so your bicycle can move more smoothly. 5.【Guarantee】: If you are not satisfied with the item you received, you can always send us an email. We will reply you immediately and help you solve the problem. specification: Item type: freewheel cassette Material: Chrome molybdenum steel (nickel plated) Product color: as the picture shows 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: 1x flywheel 2x sprocket 1x flywheel cover Note: After installation is complete, check if the flywheel is locked and if the flywheel is aligned.