Road Bike Headset Upper Spacer

thingiverse

This is an integrated upper spacer for a road bike headset. It sits between the top bearing and the stem and provides a nice smooth transition between the head tube and the stem. This one is 20mm tall. It fits road bikes with a 45mm head tube diameter. I've included two files. The first is the spacer itself. The second is a shim. The shim goes between the spacer and the upper bearing to provide clearance between the top tube and spacer. The shim is 10mm tall, which is way too much. You'll want to scale your z-axis down to get a spacer the right height for your application. On my 2013 Specialized, the spacer is 1mm thick.