I am using 255/55/18 tires, they are michelin~ I just look under my door and it says 32psi for front and 39 psi for rear. I am just wondering~ cuz I have been driving on 49psi for 20k miles already, which the dealer set me up on... and when I found out yesterday, I release the air immediately. I just want to know~ cuz some of you saying that 32 for all four tires but the label under the driver's door is saying 32 for front and 39 for rear. please advise~