[Sundancer268]

It is easy to figure out how much air to add to your tires when driven to a service station. You check the pressure when cold and find out how much air you need to add. You then drive to where you will get the air from and take a new set of pressure readings and then add the pressure to this new reading from your cold reading. If you require 120# aqnd read 95 when cold, you are 25# low. When you take the hot reading and it reads 115# you add the 25# pounds to the 115# and come up with 140#, this is what you will inflate your hot tires to. When they cool down over night they will come out to 120# the next day or close enough to 120# you should not worry about it.