Was out in the garage checking that Colby tire valve stem - which is installed without removing the tire or breaking the tire bead.
They also sell an "emergency" tire valve stem which can be installed without tools on the roadside.
https://www.colbyvalve.com/I used the brass shorty, which installs with a 1/2" wrench.
I put this in last June . After re-installing my rear wheel I learned that my tire installer had torn the new valve stem when fitting my Pirelli Angels.*
Anyway - It is holding air just fine, and I won't be changing it until I put new tires on again. And because it is short and stiff - I find it easier to deal with than a longer or right angled valve.
This 14" Pirelli Angel has been on since June, 2021 - and has @1,700 miles on it**. The front 16" of course shows even less wear.
Stig
* I still get PO'd when I see the scratches that young tire installer at my local multi-brand dealer did to my rim. He tore the valve stem,
and marred the rim.
** this scoot shares road time 50/50 with my Kymco