I asked this question before, but I'm not comfortable with my tire pressure. I bumped it up to about 44 psi because everyone here said that for a LT rated tire 40 is the min you should run and some guys were running up to 60. Well this eve I checked out all my tires and it seems as though my fronts are wearing in the center a little more. I am going to bump them back down to about 35 or so and try that for a bit, hopefully even them out anyways. My tires are LT275/70/18 BF Goodrich.

 

It depends on the tire. If you have the BFG All Terrain T/A which has a max of 80, your minimum should be 45. I would run those at around 50. That should handle any thing your truck is rated to.

An LT LR C, LR D, or LR E have different max pressures and should be run at different pressures. There are even different max pressure within LR D and LR E and those would be different. If your tires are any different than what I mentioned above, post the max pressure and LR.

 

Your tires are stamped with the info that you are looking for. If you are still not sure go back where you bought them and ask what pressure is recommended.

 

Any LT tire ought to be OK running anywhere from 40 to 45 psi.

 

Load Rated E, I suspect my digital air pressure gauge may be off, my tires should be wearing fine at 44. I will check my pressure again at a service station today.

 

NHTSA disagrees with you. If the vehicle has TPMS and a LR E max 80psi tire, the system will give a warning at 46psi. Also at 40 psi, that would be at max 50% of load carrying ability which would not even come close to the GAWR.

http://www.nhtsa.gov/cars/rules/ruli...ule.html?name=

 

So what would you run for these tires Kingfish, you seem to have done your research

 

As stated above, I would run them at about 50 and if you find that to be too much, don't go below 45. 50 should handle anything within the weight limit of the truck. If towing a heavy load, you could go a bit higher, but mainly for sidewall support. No reason whatsoever to go the max at any time.

 

can the TPMS be recalibrated for the E load rated tires so it wont give you a warning at less than 46 psi? can they be calibrated for say a d rated tire? so when you are not hauling anything and would be running a lower psi/
for the times that you are not hauling anything.
This is my first vehicle with the TPMS.
It just sucks that they dont make a D load tire for a 18 wheel.

 

I'm running 50 psi in my tires and haven't had a tire pressure warning yet.

 

Unfortunately no. It may, not sure on 07-08, go on when a certain percentage of pressure is lost like in the 09 up.