Bottom Bracket Gauge

While a standard caliper can measure these dimensions, this gauge is specifically shaped to fit into tight bottom bracket shells and around crank spindles without interference. Its dedicated design makes it much faster and less prone to user error when you are trying to identify specific bottom bracket standards.

Yes, it is designed to handle both. It features specific cutouts and edges that allow you to accurately measure the shell width, inner diameter, crank spindle length, and bearing inner diameter.

No, the markings are laser-etched directly into the anodized aluminum. This process ensures they remain highly visible and readable even after years of shop use and exposure to grease or cleaning solvents.

It is compatible with the vast majority of standard bicycle bottom brackets, crank spindles, and bearings. Because it uses a universal metric scale, it works across almost any system that relies on standard metric measurements.

Absolutely. The anodized aluminum is lightweight but rigid enough to withstand daily handling without bending or deforming, ensuring your measurements remain precise over the life of the tool.