Spoke, Bearing, and Crank Cotter Gauge

This gauge is designed to measure spoke dimensions, bearing diameters, and crank cotter diameters. It provides a precise, mechanical way to verify the size of these components before you commit to a replacement.

While built to professional standards, its straightforward design makes it accessible for any dedicated home mechanic. If you frequently perform your own wheel builds or bottom bracket maintenance, it will significantly reduce the guesswork involved in sourcing parts.

The tool is built with professional-grade materials intended for heavy, daily use in a workshop environment. Unior backs this durability with a lifetime warranty, ensuring it remains a reliable part of your toolkit for years.

The gauge measures 357 mm in length. While it is a substantial tool, it should fit comfortably in most standard professional toolboxes or wall-mounted pegboards.

Yes, it is particularly useful for older bicycles where component standards are often non-standard or worn down. By measuring the actual diameter of a cotter or bearing, you can identify the correct replacement size even when the original markings are long gone.