34.9 seat post lock for 31.6 seat post

A quick-release bicycle seat post lock (also known as a quick-release bicycle seat post lock) is a type of seat post lock designed to easily adjust the height of a bicycle saddle without the need for tools. It uses a quick-release mechanism, usually a lever or lever, to clamp and release the seat post, allowing the user to adjust the saddle height quickly and conveniently.

Quick Release: This mechanism allows the user to quickly unlock and adjust the seat post height, with just a flick of the lever, without the need for tools such as a hex wrench.