GANOPPER Seatpost Shim 27.2 to 30.9 mm Cycling Mountain Bike Seat Post Shims Alloy Bicycle Seatpost Adapter for MTB BMX ,Road Bike

Additional Details from the Manufacturer

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More features

• Material: bike Seat adapter is made of high quality 6061 aluminum alloy, CNC machining CD texture surface ,anti-rust and durable
• Feature:Use this bike post Shim, 27.2 mm Seat Post shim can be converted to 30.9 mountain bike seat post, bike seatpost adapter shim can help you change the bicycle seat tube outer diameter to meet your needs
• Size: 30.9 to 27.2 seatpost shim. 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 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 reducing sleeve shim matches well with most bicycles, such as MTB ,BMX ,Fixed Gear bike,mountain bike, road bike, city bike and more, you can easily adjust the diameter of the bicycle seat post, eliminating the trouble of repurchasing the bike seatpost.