New answers tagged presta
It is a commonly used quick and dirty fix when you don't have a purpose-built grommet to install in a rim cut for a Schrader valve. It may also not be a terrible idea if, for whatever reason, your Presta-hole rim has a burr or sharp edge and you want to avoid any possibility of problems with that.
No, there is no reason for that type of installation unless the whole in the rim is sized for a Schrader valve, rather than a presta valve. It is, as you found, unlikely to cause an issue though.
Have a close look. On a presta valve there is a wide threaded part that the lock ring attaches to. And a narrower part with the valve lock nut above it that the cap threads onto. If the narrow part has two flat sides to get a tool onto, then it's removable.
Top 50 recent answers are included