Cane Creek 26.6 to 25.4 Seat Post Shim

A Cane Creek seat post shim that takes a 26.6mm seat tube down to a 25.4mm post.

If your frame is 26.6mm and the post you want to run is 25.4mm, this fills the gap so the post clamps up properly. It is the shim on its own, not a seat post.