I understand tyre pressure should be checked when the car and tyres are cold - fair enough but this week - on Monday the temperature first thing was around 13 degrees, today 4 degrees and tomorrow predicted to be minus 2 so when cold is a big range. I have a newish car with individual tyre pressure displayed. Today when cold, all are 1 psi too low. Yesterday all were correct when car was cold. Am getting confused so any advice would be welcome as if I inflate them tomorrow before driving it will be subzero and as I understand it, the colder the temp, the lower the pressure as the pressure goes up as tyres become warmer.
thanks so much.