Feature: 1. The bike freewheel is made mainly of durable metals which have high strength, sturdy and durable to use. 2.speed flywheel 161922T design, very practical. The speed can be adjusted according to different circumstances. 3. Simple installation, provide good usage experience. Only needfew simple steps you can finish the installation. 4. Professional manufacturing, stable performance and high reliability. 5. Suitable for mountain bike, road bike, etc. Specification: Condition: 100Percent brand new Item type:Bike Flywheel Material: metal Color: As picture shown Weight: Approx. 230g Specification:speed Application: mountain bikeroad bike Package List:x Bike Flywheel