The Bottom Bracket Gauge Tool was designed to provide all the necessary measurements to identify the proper bottom bracket for a specific bike configuration. A metric scale runs along the long edges for measuring bottom bracket shell width and crank spindle lengths. Durable red anodized aluminum with laser etching. Overall size is 7″ x 3″ x 0.125″.

The gauge can measure:
– bottom bracket width
– bottom bracket shell inner diameter
– crank spindle length
– crank spindle diameter
– bearing inner diameter

Specifications:

Measures crank spindle diameters:
22mm, 24mm, 29mm, 30mm

Measures bearing inner diameters:
22mm, 24mm, 29mm, 30mm

Measures bottom bracket shell inner diameters:
37mm, 41mm, 42mm, 46mm

Measures bottom bracket shell widths:
61mm, 68mm, 73mm, 79mm, 86.5mm, 90mm, 92mm, 95mm, 100mm, 120mm, and 132mm

Measures crank spindle lengths up to 180mm