tire wear

[Big Hank]

I have 33 inch bfg m/t's on my 3/4 ton dodge ram with a cummins and 4wd. The tires are wearing very oddly. Usually i can diagnose tire problems, but these are really odd. All the tread lugs are wearing from front to back, the front of each lug has worn down about 3/16 of an inch more then the rear of the lug. This has occured in 6,000 miles. This pattern is constant the width of the tire.
Truck does not pull to either side, and steering has no tracking problem. Oh, tire pressure is at 42. Never had off road tires on a truck so large, so any opinions are great.

Thanks in advance for any diagnosis or suggestions.

Gene MJ

 

[Ramsey]

no idea, but lower that tire pressure

 

[Pat]

yea, i agree with lower the pressure and plan to do that when i get back out to the barn. i have run 42 since i got the truck, just because that was what was in the tires when i got it. The tires looked very equally worn at that point. plus I know the factory tires would have had 80 psi in them. So 42 didn't seem to unreasonable. I'll try lowering them to 34 and see how they drive. The shape on the lugs just has me worried, the rate that they have worn in the last 6k miles really scares me.

but anywys, i'll try lower and see what happens.

Gene MJ

Whoops, at Pats house, posted under his name, should have been Gene MJ

 

[Matthew Currie]

I'm wondering if it could be imbalance, or perhaps a front end problem like bad ball joints. I've noticed on my Chevy truck, that the tires tend to wear similarly, and I suspect that, this being a Chevy, and with an astouding 42 thousand miles on it, the first suspect is undoubtedly ball joints, since the General has apparently never figured out how to design a ball joint that actually works. The presence of grease fittings has doubled the life, so I suppose we should be glad they figured out that much! Of course the double of 12 thousand miles isn't really pushing the envelope of durability, is it?