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Unread 09-18-2009, 07:22 AM   #1
Group_er
Registered User
1986 CJ7 
 
Join Date: Sep 2008
Location: Victoria BC
Posts: 235
Tire Wear Question?

Hey guys, I did the chalk, tire wear test yesterday befor work, and found my fronts to be a bit to high. I lowerd them down from 26 to 25, But my rears: when heading in a strait line, are wearing more on the inside, than the outside. How do I correct this problum? More or less psi?
Thanks everyone!
Alan

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Unread 09-18-2009, 08:49 AM   #2
Happy Joe
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1985 CJ7 
 
Join Date: Jun 2007
Location: Colorado
Posts: 2,365
Inside vs. outside uneven wear on the front tires often indicates a front toe in or camber problem. (Googgle "home wheel alignment" for links that detail how to check the front camber, caster and toe-in).

Are you certain that the uneven pattern/wear is not a result of improper front toe in on tires that have been rotated from the front to the rear?

On the rear (especially with an AMC 20) it is a possible indicator of a bent axle housing. To check; level one tube of the axle housing and check the other tube if it is not also level then it is likely bent. You can also use an angle finder or level on the axle tubes and outside of the wheels to verify that both are at 90 degrees (vertical) to the axle center line.

In answer to your question; it is unlikely that tire pressure changes will affect this much, if at all.

Enjoy!
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Unread 09-18-2009, 09:02 AM   #3
Group_er
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1986 CJ7 
 
Join Date: Sep 2008
Location: Victoria BC
Posts: 235
Thanks for the reply. Im running a completly rebuilt 9-inch, out of a 70's lincoln mark V. It has 1/4 inch thick tubes! I will be shocked if that is bent!! and bent the same on both sides!
As far as the caster/camber that you were talking about, DO you mean the front tire camber/caster will adjust the rear tire wear, on a strait line?
This was the rear tires I was talking about!
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