The Bottom Bracket Gauge Tool was designed to provide all the necessary measurements to identify the proper bottom bracket for a specific bike configuration. The gauge can measure:

• bottom bracket width
• bottom bracket shell inner diameter
• crank spindle length
• crank spindle diameter
• bearing inner diameter

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 7" x 3" x 0.125".