2013 chevy 1 ton dually

machunt wrote:
I had new tires installed onmy dually, and they insisted on only putting 60lbs in the rear 4 tires and 78 in the front. i see on the placard it calls for 60 in the rear, they are 80psi tires. i always ran at 80 psi when towing. why 60psi

60PSI gives the tires the load carrying capacity to carry the factory rating of the truck. It's the pressure of the air in the tire that gives them their weight-carrying ability. 80PSI on a Load Range E tire gives you its maximum capacity. Maximum capacity on the tire is not needed to reach maximum capacity on the axle, so 60PSI.

For liability reasons, the installer will not exceed the door sticker. You can do whatever you want after you've driven off their lot, but they are not going to exceed manufacturer's specifications, even if you say it's okay.