Schrader to Presta air valve adapter keychain

A keychain that connects to a Schrader (German) to Presta (French) air valve adapter (the adapter screws into the keychain). 

Allows carrying an adapter on a keychain for bicycle air filling "in the wild", in gas stations etc.  for bicycles with a narrow tire.

This object is designed to be printed with no supports.

You might want to use a brim to help adhesion.

I also used Prusa slicer's variable layer height feature to get higher resolution around the top part to make the curve smoother.

The actual adapter is not included but you can get them for cheap online, I got these from amazon (not affiliated).

layer height: 0.15

infill: 15%

no supports.