>>>>Ok, a question for ya big rig drivers. My friend and coworker has a 99 F350 Crew Cab 4x4 Dually. He has about 12,000 miles on the truck and his front tires are cupping pretty bad. About a month after getting the truck he noticed a little wear on the front(not the cupping he has now) and took it back to the dealer for alignment. They said it was in specks (don't they always) but made a little adjustment anyway, the truck tracks very true now. With the amount of air pressure that you can put in these tires for verying load and work differences, my question is, what is the best pressure for the front and read tires to achieve maximum tire wear under normal driving circumstances? He is still hunting a good pressure for everyday driving. Any thoughts?

 

What kind of load does he carry?
What kind / size are his tires?
What does the sticker, located on the door frame - between the left-side doors say?

I have LT265/70s and run 50PSI when empty. The front tires run a little hotter than the rear - indicating they could take a few more PSI - but I'm happy with the ride and have not noticed any tire wear.

Unfortunately, I forgot what "cupping" indicates - balance maybe??? A tire shop should be able to tell you what causes "cupping". If you call a shop that sells whatever tires your running, they should also be able to tell you the "correct" pressure for various loads, too.

Good luck.

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1999 F-250 XLT Super Duty Crew Cab Long Bed
V-10, Automatic 4R100, 4.30 Limited Slip.
GVW = 6700# Towing Capacity = 13,300#
4 Wheel ABS disks + Reese 15K hitch
Dark Hunter Green. Ford Running Boards.
Grey Rhino-Liner. Captain's Chairs. CD+Tape
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