$16.90
Seatpost Shims, 3.7mm Shim, 27.2mm Seatpost to 30.9mm
The 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, durable aluminum and has a lip on the top so it won’t slide down inside the frame during installation.
