Description: Bike seatpost reducer is suit for bicycle, mountain bike, road bike etc. Bicycle seat tube adapter is made of aluminum alloy material, durable and wear-resistant. Bicycle seat tube reducer is CNC turning forming, has clear and neat turning lines. Road bike reducing sleeve is light and beautiful, and the processing precision is precise. Seatpost adapter shim can solve the problem that the size of your frame and the seat tube do not match. Specification: Color: black. Material: aluminum alloy. Size: 60mm. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Included: 1 x Bike seatpost reducer. Bicycle seat tube adapter can change the seat tube mouth and solve the problem that the size of your frame and the seat tube do not match Bike seatpost reducer is made of aluminum alloy material, light and beautiful, stable and durable for a long time Seatpost adapter shim trims neatly and has smooth, clear and neat turning lines, featuring CNC turning forming Bicycle seat tube reducer has high strength, which is light weight, not easy to rust, and not easy to paint Road bike reducing sleeve features superb processing technology, multi-size bicycle seatpost tube reducer is easy to adjust the diameter