Pump up your tyre to the correct pressure, replace your valve cap with a tyre pressure monitor and be warned when tyre pressure drops.

You get four tyre pressure monitors.

When put in place you see mainly green showing all is OK.

If your tyre pressure drops by 2psi or more a red warning indicator is exposed like a warning flag.

This means that you can quickly check by glancing whether tyre pressure is OK, and unlike using a tyre pressure gauge no pressure is lost and it is easy.

tyre pressures from 20-42 psi are monitored taking in most normal vehicles from motor cycles through cars to small vans.