I spent a lot of time on the interstate, and rarely do I ever need to move loads with my truck. I'm thinking I can run my tires at a higher pressure than the 35PSI l by Michelin. I have these tires: http://www.michelinman.com/tires/lig...specifications

Michelin LTX M/S in a 245/75 R16. I run them at 40, but I'm thinking I may be able to run them higher then that unloaded.

Any thoughts?

 

Whatever the tires are marked is what you should run them at and be safe.

 

If you put to much air in them you over inflate them and they loose their shape and there for don't work properly. basically... over inflating tires doesn't get you better gas mileage. properly inflated will

 

The tire pressure written on the tire is only the max tire pressure you can safely run with the tire at full load. It is not the recommended tire pressure. What's written on the door tag is the recommended pressure for your vehicle. If you over inflate, you will see slightly better fuel economy because less of the tire is making contact with the road, so rolling resistance is less. However, the penalty for this is that you will lessen the life of your tire due to uneven wear (center will wear out faster then the edges). So you may save money on gas by increasing your mpgs, but you'll have to buy tires sooner. You will also increase the risk of premature tire failure because you'll be causing excess heat to build up due to the excessive inflation.

 

Not wanting to start anything,but everything you said is right. Except, what it states on the door or door jamb is the recommended psi for the OEM tires and that's with a full vehicle capacity load also. Not for whatever tire you put on it.

 

I am 55psi front and 50psi in the rear, but I am using Load Range E tires. (free tires from my father in laws F-250). the max psi is 80psi.
When anything lower than that, the truck is all over the road.
So, I am sure as heck not going by the tag on the door.

clearly, I am not running oem tires.

 

Gotcha. I think I'll just keep running them at 40 then. I've had good luck there.

Thanks guys.

 

Right, thanks for clarifying that.