ROADNADO Bike Seatpost Shim, 100mm Length Aluminum Alloy Bicycle Reducing Sleeve Seat Post Tube Adapter, Diameter Switch 27.2 28.6 30.4 30.9 31.6 31.8 33.9 34.9mm

Length: The seatpost shim length is 100mm to ensure your seatpost is securely inserted. The seatpost shim are available in sizes 25.4mm to 27.2mm, so you can choose the right seatpost for your bike.
High-strength Aluminum Alloy Material: the seatpost shim is made of T7 heat treatment aluminum alloy, CNC process, light weight and high strength; anodic oxidation process, not easy to rust, integrated molding without cracks.
How to Choose the Size: Check the diameter of the seat tube of your bike, if you can't find the original seat tube diameter you can measure the inner diameter of the frame seat tube hole, and then make the right choice.
Use: This product is suitable for the seat post caliber becomes larger, the frame seat tube caliber turns smaller, suitable for most bikes.
Easy to Install: Open the tube clamp, put the conversion sleeve into the frame seat tube hole and push it to the end, insert the seat post into the conversion sleeve, adjust the height, lock the tube clamp, that is, the installation is complete.

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