ZTTO 8 Speed 42T Casette Bike Flywheel Freewheel Cycling Accessory for Mountain Road Bicycle

Feature: 1. Hollow design reduces weight without adding additional weight to the bike. 2. Made of high-strength steel, using hardening technology. It has greater resistance, durability and extreme wear resistance. 3. The strong oxidation resistance makes it difficult to oxidize and has a long shelf life. Due to the unique design of the unique mountain bike gear sprocket, you can control the shifting function well. 4. Fine workmanship, high strength, sturdyand durable. 5. Suitable for mountain bike, road bike, etc. Specification: Condition: 100percent Brand New Item Type: Bike Flywheel Material: steel Color: As picture shown Speed: 8 speed Gear ratio: 11-13-16-20-24-30-36-42T Weight: Approx. 550g . Package List: 1 x Bike Flywheel2 x Gear ring1 x Lock ring