In particular, as the weight of the vehicle, speeds and accelerations that the tyre is subjected to increase, the working pressure must be increased. In any case, tyres should not be used at pressures below 1.6 bar.
Using excessively low pressures would bring about the breaking of the tyre due to excess force on the sidewall or unseating from the rim. “Hot” working pressures are usually in the range of 2.2 – 2.5 bar.
Initial inflation pressures vary in order to obtain these values, depending on whether the tyres are preheated or used “cold”. Indeed, preheated tyres can be inflated to slightly lower values than cold tyres.
The difference will depend on the type of heater, the time it remains and the environmental conditions.