When I picked up my car last weekend I was surprised that the TPMS was saying the tires were at 43psi. I thought the dealer had simply overfilled them, but then I looked in the door jam and was shocked to see 39psi for the fronts and 42psi for the rears. That seems really high for these. I'm also wondering why the front and rears are different even tho they're the exact same tires. Anyone have any insight?