New TV tires today

[fallsrider]

I put new tires on our '05 Suburban today. Had the P tires removed, and Cooper Discoverer H/T LT tires installed. Now that my max. psi has gone from 44 to 80, what psi should I run in my tires for normal everyday driving? This is my daily driver.

The tire shop put 35 psi in them, but I'm wondering if that is enough. Maybe it is.

Then when towing our TT, what should I raise the psi to? I'm estimating our TT weighs in the 5,000 to 5,500 lb. range. Haven't had a chance to weigh it yet.

Thanks.

[Old-Biscuit]

When you changed out those 'P' tires with MAX of 44# did you check what the rims MAX pressure is?

Upgrading to a higher rated tire doesn't do any good if rims are not rated for increase

[troll3193]

My truck is a bit bigger ~7500 lbs ready to roll.

It has e-rated tires and has door post guidance for unloaded and loaded.

unloaded is 40 rear, 50 front
loaded 75 rear, 60 front

I have a little more weight on front being a diesel but might give you some pressures to try.

I do change them when I tow as it really helps to stiffen the back. I got lazy one summer and left them at 75 and prematurely wore out the center of the tread...

Bryan

PS you might google for the "chalk method" of determining best pressure