O-ring mount for byke

It's a spacer for handlebars with a diameter of about 20mm. If your handlebar is smaller, you can simply print more and stack them together. The second one increases the diameter but not the thickness.
For better performance, it's better to use TPU or TPE plastic, but I used a more rigid plastic and had no issues.
I know it needs improvement — in the future, there will be a better version.