Presta adaptor handlebar mount

thingiverse

This nifty little thing is an essential mount that securely clips onto a standard 22mm diameter bicycle handlebar and keeps a presta-to-schrader valve adapter at your fingertips. You'll never be caught off guard without your trusty adapter again! Simply screw the schrader end of the adapter into the top hole of the mount, which may require a bit of elbow grease with pliers and a brass adapter to thread the first few times. PETG works like a charm with this setup.