This is a customizable parametric adapter for a bike rim mainly for adapting a Schrader type hole to a Presta valve.

The adapter that came with my rim destroyed several tubes in the last months, which led me to design my own printable version. Since every rim is slightly different I decided to create a parametric model in OpenSCAD.

You can choose between a rectangular base or a flange that holds the adapter in place.

I uploaded one stl file with the version that I printed and that you can see on the photos. It uses the rectangular base (18x10 mm), 6.15 mm inner diameter, 8.7 mm outer diameter and 10 mm adapter length.

If you print this model, I'd love to see your makes and hear back how it worked for you.