TIRES CUPPING????
Mountain Pass
Joined: Aug 2007
Posts: 113
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From my experience the biggest cause of cupping on oversized tires is high pressure. Try reducing pressure and do a chalk test to get the optimum number. I run 35x12.5 tires on my truck and 35 psi is working great. Your weight will tell you what is the right pressure. You can also find a dusty or gravel road and look at the contact patch.
Fleet Mechanic
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA
Did they realign to factory specs? Did you get radius arm drop brackets? Did they install caster correction bushings?
All this can effect tire wear.
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New User
Joined: Jan 2019
Posts: 13
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Im going to get an alignment on it tomorrow and have them check that all tires are balanced. I hit a deep pothole a while back and the truck has been pulling a little to the right since then probably not something out of wack. Thanks for all the help and input ill report back once alignment is done!
Hotshot
Joined: Oct 2015
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From: Wyoming
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Cargo Master
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Logistics Pro
Joined: Jan 2013
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Cupping first stop is shocks.
May not work on your truck, but on a car, lean over on the L/R front fender and come down hard with all your weight, then release immediately and see if the fender continues to move up and down...weak shock if it does.
Also, look at the shocks to see if there is any leaking fluid on the outside. if so replace ASAP.
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Pigman54
1999 - 2003 7.3L Power Stroke Diesel
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Jul 29, 2014 01:23 PM