We'll just agree to disagree.

 

Hossy you are missing the whole point of why Utah Jake started this tread. He wanted to know what tire pressure he should be running his tires at not what tire pressure he should be running when the truck has a load in it. And just because you have a load in your truck does not mean that you should be running the maximum air pressure of the tire.

Outside of wheeling the proper tire pressure you should be running is that which will give "even" pressure across the whole contact patch of the tire. This is how it was explained to me by a Michelin tire tech that was here from Europe working an SCCA Pro Rally event in PA. They use an infrared pyrometer to measure the temperature of the tire across the contact patch at various points from shoulder to shoulder (sound familiar). What he is looking for is a consistent temperature reading which indicates proper inflation. If the temperature readings are higher at the crown of the tire, it is overinflated. If the temperatures are higher at the shoulders, the tire is under-inflated. Either condition is dangerous as you are fatiguing the tire by entering too much heat in a concentrated part of the tire. The infrared pyrometer is the most accurate way to determine proper inflation and they use it for all their tire testing. Car, light truck, OTR, heavy equipment, military, racing car and racing truck tires. I made the comment about the chalk method and he said that is still an effective way of determining tire pressure just not as high tech.

 

How many miles do you get out of your swampers ronin007? Looking to go more aggressive when my 305's wear out! Thanks.

 

hmmmmmmm.....just make sure they are between 45-55 front/////65-80 rear depending on load..........no load in rear go as low as 45psi for the e rated 10 ply for the f350

dan / ft

 

Don't know yet. They are still new at about 5,000 miles and haven't wheeled with them yet (other than some snow wheeling). I have Baja Claws on another truck that only lasted around 20k and are pretty chopped up. I had used Equal to balance them and I think that stuff contributed to them wearing unevenly.

 

They overinflated my tires 1 time by 40 PSI. That was the last time I had someone else service my truck.

 

For what its worth, daily driving I'm running 60 psi front/rear with canopy. I've tried down to 55, but that felt too soft; as did dropping the rear independent of the front. So far, 60/60 seems the best, and I'll monitor tire wear and adjust accordingly.