1. Know your tyre pressure. Find your vehicles tyre pressure, and check your tyre pressure every two weeks. 2. Check temperatures. Every 10 degrees drop can lower tyre pressure by 1-2 PSI (0.07 - 0.14 Bar). Significant altitude changes affect pressure readings - check where you drive. 3. Check tyres regularly. Studded winter tyres also need regular maintenance. Check your tyre pressure even if you have a tyre pressure monitoring system.