"Heavy loads or towing puts an extra strain on your tyres. So if your vehicle is fully loaded with passengers and luggage, the general rule is to add 28kpa (4PSI or 4lbs).
At high speed, (defined as driving at 120km/h for over one hour), your tyres will wear out twice as fast as when you drive at 70-80 km/h. If your tyres are under-inflated by twenty per cent tyre life can be reduced by thirty per cent. The rule here is to add 28Kpa (4PSI) from your Minimum Compliance Plate Pressure. Don't inflate your tyres above 40 psi or 280 kPa. When the tyres get hot from driving, the pressure will increase even more."
Tehat 40 psi = ~2.8 BAR egy teljesen jo ertek, bar ez tenyleg fugg a gumid meretetol, ezert en 2.8 al jarok a nyari gumival ami 235/35, a telivel pedig 2.6 on jarok 225/45 el. (1.8 tonna ontomeg)