Tire air pressure question
 

I am running 35x12.50R-18LT, TrXus STS Radial Tire by Super Swamper on my truck.
Does anybody here run them also,and what it the best air pressure to use?
thanks much

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Try the chalk method, scrub a chalk line across your tread and see how it wears off. If you see any chalk on the outer edges, your tire pressure is too high.

Vehicle weight and wheel width are really all that tire psi is effected by. It's been my experience that the closer the wheel width is to the tire width, the more psi that you can run. That number on the sidewall is attached the phrase 'MAX PSI'. I can't tell you how many tires wore down in the middle before I figured this out!

Thanks,I will try this.

i would not run your tires at the max amount on your tire. assuming your max is at 65 psi i would run them at 55psi to allow the air to expand when the tire heats up going down the road. no less than 45 psi.

max air pressure is 45 psi.I an running them at 40,I was thinking the same.Going down 10 pounds.The ride was hard at the max.The big trouble when you run these tires the factory brakes don't work that good.

Look,
the less tire pressure the more force is eliminated in the rubber, of course you gain comfort.
The higher the pressure the less fuel you do consume.

Call the tire manufacturer, they can give you a tire prssure recommendation depending on your truck. They want a happy, satisfied customer. As clean and nice as your truck does look, get a second set of on-road tires. You will gain a hugh increase on mpg.
The offroad style with MT's is expensive in your pocket. The swampers will last longer and will be available when you need them.

I have three sets of tires. On-road for daily commutes. Winter tires and MT's. I'm choosing the right ones for the right ground. Otherwise the MT's would wear faster than I can write this post.

good advice.I bought the truck like this. The guy put 10,000$ into to it he couldn't get back.I will look for a second set.

Im gonna agree with you and say 30-35 psi would be a good idea. I cant imagine them riding too good at that high of pressure.

I tried them at 50 psi and it was like riding stones. 35 ir probably a real good pressure.
thanks much

:rocking:do the chalk method takes alittle while but works great! On my 02 f250 when I first lifted it with a rubicon 6.5" lift and ran 37x13.50r17 toyo mt`s I did the chalk method in a flat empty aprking lot and when from a starting air pressure down to 38psi in the front and 40 psi in the rear. I got over 56,000 miles out of those toyo m/t`s. I just bought a new to me 08 2500 mega cab with 37" toyo mt`s drove out to omaha ne, to buy and the dealer had the tire pressure at 60 psi front and 65 psi rear and it rides relly bad! I need to lower it down alot! Your mpg will go down but those expensive tires will last alot longer. I have 12.5" of lift on my 02 f250 with mickey thompsons claws on it and I only run 35 psi in those tires got over 30,000 miles on them and they are at about 40-45 % tread left. Good luck!!