We earn commissions from purchases you make using links in our articles. Learn more. Every single car has valve stem caps, but let’s be honest—they’re all really boring. In fact, most cars come with ...

Every single car has valve stem caps, but let’s be honest—they’re all really boring. In fact, most cars come with the same black plastic caps that are designed to do a single job: protect your valve ...

When [upir] saw that you could buy tire valve stem caps that read pressure electronically, he decided to roll his own Tire Pressure Monitoring System (TPMS) like the one found on modern cars. An ESP32 ...