9 Speed Cassette, Durable Lightweight Smooth Shifting Bicycle Gear Set, 9-Speed Compatible for Road Cycling Mountain Biking Commuters Enthusiasts

• 【UNIQUE DESIGN】: Adopting a hollow design, thus while reducing weight, it can also increase speed, more functional.
• 【QUICK TO INSTALL】: Easy to install, no adjustment is required, stable gears and accurate positioning are provided within the range.
• 【MAIN ADANCE】: The bicycle flywheel is resistant to high temperature, rust, non‑deformation, with higher strength, durability and extremely strong wear resistance.
• 【NICE CHOICE】: Great accessory for mountain bikes and road bikes, perfect and favorite of cyclists!
• 【GUARANTEE】: We strive to provide a better customer experience. In terms of any problem of this product, you can send emails as soon.

Feature: 【MAIN ADANCE】: The bicycle flywheel is resistant to high temperature, rust, non‑deformation, with higher strength, durability and extremely strong wear resistance. 【QUICK TO INSTALL】: Easy to install, no adjustment is required, stable gears and accurate positioning are provided within the range. 【UNIQUE DESIGN】: Adopting a hollow design, thus while reducing weight, it can also increase speed, more functional. 【NICE CHOICE】: Great accessory for mountain bikes and road bikes, perfect and favorite of cyclists! Specification: Item Type: Bike Freewheel Material: Chromium-molybdenum steel Color: As Pictures Shown Weight: Approx. 583g/20.6oz Specifications: 9 speed 11-50T Small teeth: 11 T Teeth: 11-13-16-20-24-30-36-42-50T Black Big Teeth: 50T Wide tooth ratio mountain flywheel, large tooth ratio flywheel, for single tooth disc. It's easier to climb a hill Package List: 1 x Bike Freewheel