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Discussion Starter · #1 ·
Any body ever saw a set of knobbers or any aggressive tires on a truck,,where the wear pattern was really odd/// the lugs on the outer edge of the front tires......... Every other lug is worn down bald but the lugs in between are showing no wear??? I see this alot on independent front suspension trucks like toyota , nissans. I can't comprehend what causes this..

Anybody know>??

 
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Discussion Starter · #2 ·
What you are seeing is tire cupping. It seems to show itself more with aggressive bar tread(ie mud)tires. I have found that insuficient dampening to be a leading cause. It may be a bad shock, or not enough shock (this is one of the reasons Ford ran quad shocks on the coil front ends). Other things to look at are bad bushings, ball joints, toe in, toe in on turns (ifs vehicles), excessive front axle load (ie big bumper/winch/spare parts on a light duty front end), improper air pressure, and too soft a tread compound for the given axle load (I had this problem with my F150, the tire I wanted to run did not like the fact that my steering axle scaled in at just shy of 4000lbs).

These are just a few of the things to look for, but a good place to start.

Dan
"Sometimes one pays most for the things one gets for nothing. "
-- AlbertEinstein
 
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Discussion Starter · #3 ·
Should I expect this wear on my CJ 5? It has a 304 going in it. Which would make it heavy on the front end.

 
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Discussion Starter · #4 ·
I had a set of Patriot Mudders on my CJ-7 about 4 years ago that was starting to do the same thing. We never did figure out what did it, the supension was in fine shape and so were the shocks, toe was right, we ended up figuring it was a tire defect, they warranteed the tires and gave me a set of BFGs.

Brad
ORC Land Use Section Editor
http://www.off-road.com/land
Vice-Pres. Rock Garden 4 Wheelers, Farmington, NM
http://rockgarden.rockcrawler.com
 
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