I have just bought a new Land Rover Discovery Sport and specified the smallest rims at 18-inch as I have read your advice about bigger rims being less comfortable. However, the ride still seems very hard in town. I looked at the type pressures and they are recommended between 35-41PSI. Is this recommendation for fuel efficiency and lower emissions and therefore the manufacturers want to look better, so recommend higher pressures? Can I safely drop them to 32PSI and soften the ride? I guess if I have a full load and want to go long motorway drives I should increase. Also, I always thought that the pressures quoted are at cold and that is how they should be measured, but you say that the recommended pressures are when hot, which is it?