The build
What defines the project.
- Long internal probe for frame tubes
- Dial gauge for reading wall thickness
- Custom-built supports and stops
- Checks butted and straight tube sections
Project
A tool we built ourselves to measure the wall thickness of frame tubes.

The story
In frame building, knowing only a tube’s outside diameter is not enough. Butted tubes are thicker at the ends and thinner in the middle. The ButtChecker lets us trace these wall thicknesses and transitions along the tube. Building the tool ourselves also creates a different connection with the material: we understand not only the reading, but how it is produced, and experimenting is part of the fun for us.
Views & details




The build
The result
A tool that supports accurate measurement while deepening our understanding of tubes, material distribution and frame building.
Your idea