2.5D Handlebar Adapter Rings

Ever wanted to mount a lamp or other item to your bikes handlebar, and found
the diameter did not fit?

Here are two types of adapter rings, I made for a friend's bike.
Printed in flexible black TPU with 40% infill these rings work great. The rings
are cut open on one side, so that you can snap them over the handlebar without unmounting everything else.

The drawings are simple SVG files made in inkscape, and extruded into 3D using
my paths2openscad extension. (https://github.com/fablabn