I bought a tyre pressure monitor that screws onto the valve, called Tyre Dog' and it is supposed to show pressure as well as temperature and can obviously be transferred to any wheel. Works with radio signal to a receiver in the car. Used to lose tires when they are having a slow leak and first sign is vibration on dirt road and one lost tire. Problem is that it sometimes give ridiculous readings like pressure of 500kpa and temp of 80 celsius while everything is fine. Anybody else has experience with this type of monitor? Agent selling it has disapeared