Size: 25.4(1 inch) to 28.6(1-1/8 inch) seatpost shims. Length: 100mm.
Feature:Apply this bike post shim,(1): 25.4 ID Seat Post can be Switched as 28.6mm size.(2): You can also use this reducer as bike Fork shim
Material: bicycle Seatpost Shim is made of high quality 6061 aluminum alloy, CNC machining CD texture surface ,anti-rust and durable
Tips: Please check your bike frame seat tube outside diameter. Measure the inside diameter of your old clamp. Or measure the outside diameter of your seat tube (on your bike frame). Then make a right choice. - - -Because of hollow design，In the process of transportation are squeezed may be out of shape，Please kindly exchange one
Application: Bicycle Seatpost reducer matches well with most bicycles, such as MTB ,BMX ,mountain bike, road bike,and more, you can easily adjust the diameter of the bicycle seat post, eliminating the trouble of repurchasing the bike seatpost.