That sounds really weired. Call you local align ment shop. Its a free call and in two seaconds they will give you a anwser.

 

Whoa holdup. Before you go assuming your tires wear unevenly take a very close look at those GSA's. If you look closely at a new one, you will notice that the tread depth on the outside edge is only about half as deep as the rest of the tire, which when worn give it the appearance of having been worn on the outside edge. I'll even bet it's the same thing on all 4 corners, right? I'd just save the money for now and replace them with a better tire( Im doing this presently). Just mho.

 

My tires are wearing unevenly. The outside edges are wearing faster than anything else. They are the Goodyear GSA P225/75R15 that come stock.

After doing some reading, alignment is the first thing to check. Outside edge tire wear is usually attributed to misaligned camber - the vertical tilt of the wheel. However, the Factory Service Manual says that camber is permanently fixed on the Jeep TJ, and cannot be set.

Is it my aggressive driving style?

could be an underinflated tire if the edges are balding faster then the middle

 

could be an underinflated tire if the edges are balding faster then the middle

Thanks, but it is only the outside edges. The inside edges are fine.

 

That's not a camber issue, that's a toe-in issue. Set your own toe-in to 1/8" per the instructions at http://www.cowtownjeeps.com/ where you'll then click on "Tech Info", then click on "Aligning your TJ, XJ, ZJ". It is EASY, just as accurate as an alignment shop can do, and only takes a wrench and a tape measure. I haven't paid for an alignment in years since learning how easy the toe-in (99% of a Jeep's alignment needs are only toe-in) is to set. :thumbsup:

 

I think NWJEEPGUY hit it- the GSA's wear like that. It looks like they wear out faster on the outside edges. All 4 of mine look the same. I don't think my toe in is messed up in the rear.

 

Jerry's right, excess wear on just the OUTSIDE of your front tires is the tell-tale sign of excessive toe-in. I have seen it on many cars, including my own. I autocross, and like to increase my toe-in so I get more responsive turn-in. Well, I quickly realized that once you do this to a car, be prepared to not drive it on the highway or count on it as a DD, because you will EAT the outside edges of your tires rather quickly.

Think about it- when both front tires are toed in too much, the tire, in effect, is scraping laterally across the pavement as it rolls forward. For every mile you drive, you are essentially scraping the tire sideways dozens of feet. The leading edge of the scraping will take the most wear, and since this is the outside edge, you will notice that the outsides of your tires are wearing noticeably faster.

Excess negative camber, and too much toe-out will wear the insides. In fact, sometimes different alignments are used to counteract eachother. A car that has been lowered and has too much negative camber to adjust out, will sometimes increase toe-in, to equalize wear on the inner half and outer half of the tire, and get back the contact patch that had been lost to the "tilting" of the over-cambered tire.

Sorry for the rambling. Just an FYI

-Chris

 

Thanks, guys, once again!

Jerry - I'll go take a look at the directions and see if a friend and I can blow out some carbon and do toe-in for a fun evening. LOL!