Shanrya 9-Speed Bike Freewheel - Durable Wear-Resistant Bicycle Cassette, Anti-Rust & Deformation Proof for Road & Mountain Bikes - Perfect for Cycling Commuting, Trail Riding & Fitness Training

Product Description

Feature:1. Made of high strength steel, nitrided to strengthen the surface, and produced by cold forging equipment. It is rust proof, non deformation, wear resistant and durable2. The bottom of the flywheel is provided with an interface thread, and the flywheel and the flower drum are locked through the thread3. High accuracy thread ensures close connection with bicycle wheel and stable operation4. Hollow out low noise to ensure stable rotation of the chain and low noise; Provide fast riding speed and reduce the burden of long term riding5. Excellent accessory for mountain bikes and road bikes. It's a favorite of cyclists. Easy to installSpecification:Item Type: Bike FreewheelMaterial: SteelNumber of Flywheel Teeth: 13-14-15-17-19-21-24-28-32TApplicable: 9/2x9/27 SpeedBottom Internal Thread Diameter: Approx. 34mm / 1.3in Package List:1 x Bike FreewheelNote:Notice before purchase: if your chain ride time is too long, it is recommended not to replace the new flywheel at will; If the flywheel is replaced with a new one, there will be tooth skipping and chain skipping, which will affect the normal riding.resolvent:Method 1: replace the old flywheel with the old chain;Method 2: in the case of tooth skipping and chain skipping, ride forcibly for a period of time. The running in time varies according to the wear of the chain.Please allow 0 to 2 cm error due to manual measurement. Thanks for your understanding.