TPMS accuracy

[Rogwp]

I think most people think of an air valve with a gauge and a Schraeder chuck of some sort as an “inflator.” An “automatic inflator” just stops at a preset pressure. The air source doesn’t need to be part of the assembly — though there are literally hundreds of “portable inflators” listed on Amazon.

The air source I have been using is part of the spare tire kit that comes with the car. It actually works quite well!