The sticker on my truck door says inflate tires to 35 PSI, but tires are not the same size ... what do I do?

A good rule of thumb is to go 5 to 10 psi below the "Max PSI". That would put you back to around 35 psi. You should be ok at 40 psi, but watch how the tires wear. If you notice them wearing more in the middle of the tread, reduce the pressure.

There are a number of factors here. If those tires on the truck now are roughly the same outside diameter and not too much larger than the stock tire size, then i would recommend you stay at the manufacturer's recommended pressure. However, there are time to stray.

My truck is an 84 Suburban, I think the stock tire size was like 235/45/R16 (Don't know for sure off hand, but something not too far from that) If I had the same size or close to the same size tires, I would be running at the recommended tire pressure. However, since the tires I have are 35 X 12.5 (a slightly different scale of measurement), they are a bit larger and wider, and in this case, for the best tire wear, traction, road feel, and stability I run my tires at 44 psi. The max on my tires is 50 psi.

If you want a better answer, post a picture of the tires on the truck and what the tire size is. Or you can e-mail me a picture of the tires on the truck and what the tire size is and I'll do my best to help you.

The "Max 44 PSI" means if you don't want the tires to pop don't exceed 44 PSI. The Mfg says 35 PSI and if you do that, you'll be fine. I think 40 psi will give you a harsh ride and wear the middle of the tread out prematurely.

Maximum pressures are just that... maximum.

Unless there is a major difference in size between the originals and yours, then there is no problem staying around the recommended 35 PSI.

Stay 7-10 lbs below the max. 35 psi should give you the best ride...

Go with whatever is printed on the tires themselves. 40 PSI is safe if the max is 44 psi. It's better to keep your tires inflated close to the max because it is better for handling and it improve gas milage.

go no higher than what the tire manufacturer recommends.

Now this is unless you are willing to take a gamble you can go 10 pounds over what is recommended if you are overloaded.

I would not recommend overloading.

What does it say on the tires? Or call the tire store where you bought the tires.

go with 35 lbs.

get the size of the tires & look it up cripes