Material: bicycle Seatpost Shim is made of high quality 6061 aluminum alloy, CNC machining CD texture surface ,anti-rust and durable.
Feature:Use this bike post shim, 30.9 ID Seat Post shim can be converted to 31.6 bike seat post, bike seatpost shim can help you change the bicycle....
Size: 31.6 to 30.9 seatpost shims. Length: 100mm..
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....
Application: Bicycle Seatpost reducer matches well with most bicycles, such as MTB ,BMX ,mountain bike, road bike,and more, you can easily adjust the....