Czech company Coda Development will be displaying its patented SIT (self-inflating tyre) system at the SAE World Congress in Detroit in April, and is looking for partners to help bring this to market in the near future.
The system is simple but very clever, and involves fitting a tube chamber to the tyre wall. When the car is moving, the tube acts as what is known as a peristaltic pump and pushes air into the tyre. When the tyre reaches its desired pressure, a valve prevents any more air being pumped in.
This means that the tyre pressure - which we should all check regularly, though most of us don't - no longer has to be checked at all. If air is lost, the SIT system provides more, so the tyre is always at its correct pressure, which in turn means increased tyre life and better fuel economy.