Just got new 32x11.5 mounted on stock rim on my 96 4x4. What tire pressure should I run to get max life out of tires. The guy that put them on put in 43lbs which sounds high to me. I've always ran around 35 lbs. These rims are stock 15x7.5. Thanks

 

what are you doing with your tires? everyday pavement driving? how much does the tire say to use?

 

daily driver use.

 

That sounds like an awful narrow wheel for that size tire, to me. Here is what I did when I ran 33x12.50-15's on ten inch wheels on my '88.

Start with the tires fully inflated to the rated max. Go to an empty paved parking lot and make a mark across the tread with tire chalk. roll the truck forward enough to see how flat the tread is on the ground. Adjust air pressure until the chalk is removed across the width of the tire.

You will probably end up at something like 28-30 pounds. I usually ran about two pounds more in the front, due to the weight of the engine. When you need to haul something, air the tires up so you don't get too much flex and heat build up.

I have done this on all of the trucks I have ran larger than stock tires on for the last thirty years and haven't had a problem yet.

I got the idea from a Hot Rod magazine article about running wide tires on musclecars about 1980.

Robert

 

I have 33x12.50x15 on my truck. 35 pounds. Summer, winter. Highway, city. All the same. Thats probably the safest bet. The only downside is that since they are so wide and the wheel is so narrow, it eats the center of the tire no matter what the pressure.

What im saying is, run at 35 and that narrower size tire will be fine on those wheels.

 

35psi is what you should be running on everyday use. If you are loading it up, then go to 40-45psi

 

I always ran 35lbs when I had the same size on my stock rims, seemed to wear well and provide good traction for whatever I was doing.

 

Thanks for the advice guys. I know the tires are a little pinched on those narrow rims. I figured they would wear out in center quicker due to this. I drove across a fine gravel parking lot and
only the center of tire was

getting dirty at 42 lbs. I've
dropped pressure down to
35 to get more tire on road. I
couldn't pass up the deal on
these tires. Practically brand new BFg all terrain for $50 a piece on Craigslist. Sweet

 

I've got the same size tires on my stock 7.5" rims too and I run 'em at 45 lbs. I have BFG A/Ts as well, which have pretty blocky tread at the corners, so if the inflation/rim size raises the edges a bit, that is OK because it will make the tire quieter. So far I have not seen a problem with wear in the center like you are concerned over - I've got about 20K miles on them. I had the same size tires on my Bronco (Michelins) on the same rims and they went 90K miles.