Bottom Bracket Gauge

This tool is designed to measure bottom bracket shell widths, shell inner diameters, bearing inner diameters, and crank spindle diameters. It also features a dedicated scale to measure crank spindle lengths up to 180mm.

It covers the most common industry standards, including shell widths from 61mm to 132mm and inner diameters ranging from 37mm to 46mm. While it handles the vast majority of modern setups, it is best used to verify compatibility for standard threaded and press-fit systems.

Yes, it is machined from red anodized aluminum, which is both lightweight and rugged. The measurements are laser-etched directly into the metal, so they won't rub off or fade with frequent handling.

While digital calipers are precise, this gauge is specifically shaped to fit into tight bottom bracket interfaces. It eliminates the guesswork of trying to angle calipers into awkward spaces, giving you a quick, reliable confirmation of your bike's specifications.

Absolutely. The gauge includes specific cutouts for common spindle diameters, including 22mm, 24mm, 29mm, and 30mm, making it easy to identify which crankset or bearing kit you need.