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Old 01-11-2006, 01:59 PM   #1
choloman05
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Default Outside Tire Wear ?

Hey guys,

My tires are much more worn on the outside than middle. Is that due to underinflation, something else, or nothing? I have the stock Re-92's on my 02 WRX with almost 30k. Any help is appreciated.
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Old 01-11-2006, 02:06 PM   #2
Sneeky Pete
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I have 16k on my 05 RS and I burned my fronts "RE-92's" up the same way with in 14k. I ran 32 pounds up front and often hit corners at around 30..........I run 38 psi on new aftermarket tires,no change in driving style,and no signs of un even wear..
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Old 01-11-2006, 02:09 PM   #3
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Sounds like too much positive camber or maybe too much toe-in. With underinflation usually and the inside and outside edges will wear out but the middle will not.
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Old 01-11-2006, 02:18 PM   #4
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Just sounds like you do a lot of hard driving. A little more negitive camber will help your tires wear more even. But if your not a hard driver then like the others said you might have positive camber.

Negative camber looking from the front = / \

Positive camber looking from the front = \ /
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Old 01-11-2006, 02:18 PM   #5
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Question

sounds like alignment issue and/or excess understeer

scoobies like their alignment just so, esp w/front toe-in

is the wear even, or are the outer edges kind of scalloped?

Dave G
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Old 01-11-2006, 02:20 PM   #6
davis10
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outside edges with respect to one tire or two. If one you need more air, if two id be what samirr76 said.
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Old 01-11-2006, 02:29 PM   #7
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Can you clarify if you are speaking of "both" outer edges of a tire or just the inside/outer edge? If both edges of the same tire are worn, I would suspect underinflation. .....if it were the middle, then it would be overinflation. However, if we are only talking about one edge of a tire (outer/inner), it's probably an alignment issue (i.e. excessive toe, camber, etc.).
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Old 01-11-2006, 02:35 PM   #8
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Quote:
Originally Posted by RB5 Clone
scoobies like their alignment just so, esp w/front toe-in
Everything that I've read/heard suggests zero toe all around (excluding special applications of course).
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Old 01-11-2006, 03:15 PM   #9
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stock toe specs are 0 plus/minus 3mm F and R

a little front toe is good, but more is NOT better and will chew up tires

setting dead zero toe on WRX rears is a standard ploy to minimixe understeer

DG
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Old 01-11-2006, 09:58 PM   #10
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thanks for all the help so far, but you guys are too smart for me. Thanks on the camber definition clarification (I was always wondering on pos. vs. neg.). Sorry, I didn't specify earlier, but I have even wear on all 4 tires on the inside and outside. So far, it sounds like underinflation. I check my tire pressure pretty regularly though and I always set it to the cold specs found on the inside of the door jamb. Maybe my tires were underinflated for a part of a cross-country trip I had last year and that could've caused a lot of that bad wear? Thanks again, all help appreciated.
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Old 01-11-2006, 09:59 PM   #11
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oh yeah, and what's toe-in?? ps. I usually drive it like a corolla
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Old 01-12-2006, 10:33 AM   #12
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Quote:
Originally Posted by choloman05
thanks for all the help so far, but you guys are too smart for me. Thanks on the camber definition clarification (I was always wondering on pos. vs. neg.). Sorry, I didn't specify earlier, but I have even wear on all 4 tires on the inside and outside. So far, it sounds like underinflation. I check my tire pressure pretty regularly though and I always set it to the cold specs found on the inside of the door jamb. Maybe my tires were underinflated for a part of a cross-country trip I had last year and that could've caused a lot of that bad wear? Thanks again, all help appreciated.
Personally, I found the factory recommendations too low. I don't recall what I finally settled on in the stock tires but it was a few pounds more than what was stated on the car. There are a few threads in the tire forum discussing "ideal" pressures. It's just a matter of what works best for you in your particular scenario. .....same can be argued about alignment setings.
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Old 01-12-2006, 10:35 AM   #13
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Quote:
Originally Posted by choloman05
oh yeah, and what's toe-in?? ps. I usually drive it like a corolla
Here's a good, descriptive picture from Tire Rack:
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Old 01-12-2006, 10:45 AM   #14
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Quote:
Originally Posted by Kean
Personally, I found the factory recommendations too low. I don't recall what I finally settled on in the stock tires but it was a few pounds more than what was stated on the car. There are a few threads in the tire forum discussing "ideal" pressures. It's just a matter of what works best for you in your particular scenario. .....same can be argued about alignment setings.
Agreed. I'm convinced mfr's set the tire inflation specs at the minimum allowed that will still support the weight of the car, to improve highway ride quality.

Unfortunately, that hurts handling characteristics, hydroplane resistance, and gas mileage.
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Old 01-12-2006, 02:03 PM   #15
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I air my RE92's up to 44F/42R or there abouts to get any kind of response out of them. Wear is mostly even.
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Old 01-12-2006, 11:09 PM   #16
choloman05
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well that sucks for me.

thanks for the toe-in, toe-out diagram. but I still dont' really get it. I guess I'll research it.
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Old 01-13-2006, 09:24 AM   #17
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I think there's a pretty good thread about alignment stickied in the Suspension forum. It's around the idea of a DIY alignment, but it explains all the aspects (camber, toe, caster).
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