Tire pressure

MD alighnnent says the wheels are rated for 130 psi due to wheel failure.
Tires can exceed that pressure.

 

Crack, bend, or break.

 

What is the lowest tread depth measured In any major tread groove? 2/32 is not that much difference and measured from where to where?

What you show is typical wear on any chassis I have seen on the road for hwy application. There is nothing wrong, so dont go looking for a problem. Have the toe checked and fit a new set of tires. Steer tires are never going to wear even across like a drive or trailer tire due to scrubbing from caster to help the truck turn. The tires are wearing that way cuz they are doing their job. Alot of people will swap steers to a trailer axle to run the last life out of them cuz you can run them down to 2/32. They are always a dead giveaway cuz the edges are still worn.

 

120 psi in your steers?? I know guys around here that haul 120k on a daily basis and they don't even run that high of a pressure. Running that high of a pressure without the weight is going to give you a poor contact patch with the road and poor handling, it's dangerous.

I'm rarely over 30k and always around 11k on the steers and run 90psi. 75psi in the drives and 90psi in the spread axles.

 

Get a pressure/load chart from your tire manufacturer. They have put a lot of R&D into these charts and we will give you best idea of what pressure to run.

 

The only problem with that theory is that here in Ont they consider any tire with less than 80% of max load flat and oos. Not saying l disagree with you but mto goes off the number on the tire which is max pressure. I got to see some poor kid get raked over the coals in an empty cube van with a low tire on the rear. Had 55lbs in it. The math said 65lbs and they made him get a tire guy out there to blow it up and check for leaks. Craziness.

 

Setback axle? How aggressive do you drive around corners? The way a lot of guys drive I'm surprised their tires last a year

 

Gee, good thing I don't go there. I had my trailer tires at 80 lbs for several years.