The Problem Solvers Seatpost Shim is what you need when your seatpost is a little too small-diameter to fit tightly into your frame. It's made of light and durable aluminum and has a lip on the top so it won't slide down inside the frame during installation.
|2.0mm shim, 27.2 seatpost to 29.2 frame||708752009899||ST0220||654-0366|
|3.2mm shim, 27.2 seatpost to 30.4 frame||708752011526||ST0232||654-0372|
|3.7mm shim, 27.2 seatpost to 30.9 frame||708752012851||ST0237||654-0374|
|4.4mm shim, 27.2 seatpost to 31.6 frame||708752012875||ST0244||654-0376|