Tire wearing quickly on the inside! Trouble shooting Help!

[BobbyBlue86]

So about 500 miles ago, a friend gave me his 2013 WRX wheels and tires with about 10k miles on them and they were all perfectly fine. Now they are almost bald on the last 1 - 1.5 inch of the inside of both the front tires. With my limited knowledge I figured it was an alignment issue so I took it to get it checked. When he was finished with the alignment, I was handed the sheet (which is a foreign language to me) and to me it didnt look like the alignment was the issue. So im in need of some expert advice...

Here is the sheet.



Before I went to get the alignment, I checked the front end for any damage and bushing damage by trying to wiggle the wheel while off the ground and touching all the linkages. Nothing was bent, broken, loose..... everything seemed to be working just fine. So I am looking for some advice on what to check next!

Thanks in Advance!

[wheelhaus]

How many miles did you put on them? Are they inflated properly? Are you 110% certain the inside shoulders weren't worn when he gave them to you?

Edit- the before and actual numbers look less than ideal but certainly nothing I would ever suspect to cause severely accelerated tire wear.

[BobbyBlue86]

Originally Posted by wheelhaus

How many miles did you put on them? Are they inflated properly? Are you 110% certain the inside shoulders weren't worn when he gave them to you?

Edit- the before and actual numbers look less than ideal but certainly nothing I would ever suspect to cause severely accelerated tire wear.

Ive only put about 500 miles on them since putting them on my car and I wouldnt have bought them from him with out looking them over.

They are inflated properly yes. Every time i fill my car up, there is a discount tire right next door and I get the free air check. I actually caught it while doing the air check after my first fill up.

[wheelhaus]

Originally Posted by BobbyBlue86

Ive only put about 500 miles on them since putting them on my car and I wouldnt have bought them from him with out looking them over.

They are inflated properly yes. Every time i fill my car up, there is a discount tire right next door and I get the free air check. I actually caught it while doing the air check after my first fill up.

Wow only 500 miles, I somehow missed that in the original post... With near zero camber I'd expect excessive wear on the outer shoulder from spirited driving, certainly not the inside. Inside wear would be a red flag to check for excessive neg camber and wonky toe, causing that inside edge to scrub a lot. I'm stumped...

Maybe the original "before" toe measurements being 0.05° L (positive, out) and 0.03° R (positive, out) adding to a total difference of 0.08° was enough to scrub the tires that badly, since the tires are pointing away from each other, they would put a little extra stress on the inner shoulder... That's just a guess, I'm no alignment guru.

FYI the sheet shows the angles of the wheels, the three measurements you're most concerned with is toe, camber, and caster (caster is for front wheels only).
Toe is pointing inward or outward, like crossing your eyes. Negative toe means the front edges of the tires are closer than the rear. Typically you want 0° (dead straight parallel), but sometimes you might want a little toe +/- to induce specific handling characteristics.
Camber is like tilting your head side to side. Negative camber means the top of the tire is tilted inward. This helps keep the contact patch fat by preventing the tire from rolling over onto the outer shoulder under a lateral load.
Caster is the axis of steering, like a bicycle or motorcycle, the front wheel steering axis is tilted back slightly. Positive Caster means the axis is tilted back slightly. Its like dynamic camber, and also helps the tire lean into a turn.

[finch1750]

Thats a pretty good amount of toe in the rear. Are the fronts just as bald as the rears? What tires are they? Pics of tires?

[CSG Mike]

I don't see anything way out of whack with the alignment.

Are your tire pressures good?

[asdf]

Originally Posted by finch1750

Thats a pretty good amount of toe in the rear. Are the fronts just as bald as the rears? What tires are they? Pics of tires?

i think he said it's the front tires that are bald on the inside, not the rears. strange.

the clearance is pretty close up front for those wheels -- are you lowered? rubbing on anything in the wheel well?

[finch1750]

Originally Posted by asdf

i think he said it's the front tires that are bald on the inside, not the rears. strange.

the clearance is pretty close up front for those wheels -- are you lowered? rubbing on anything in the wheel well?

Damn. Missed that. That really is wierd

[BobbyBlue86]

Everything is stock and pressure is good. I even set them to the recomemened pressure that are printed on the inside of the wrx door. Pictures are coming here soon.

[BobbyBlue86]

[BobbyBlue86]

Originally Posted by asdf

i think he said it's the front tires that are bald on the inside, not the rears. strange.

the clearance is pretty close up front for those wheels -- are you lowered? rubbing on anything in the wheel well?

No rubbing at all. That's the first thing I checked... Grr!

[GotBRZ1691]

Manufacturing defect? Otherwise I am stumped.

I noticed my tires have uneven wear as well, but they had 25k on them and they looked like yours do.

[swarb]

Looks pretty normal to me.

It will only take a couple hundred miles to extremely wear a tire. Happened to me. Held off on a alignment for couple hundred miles after lowering, inside of tires got worn, got an alignment. When tires needed replacement couple thousand miles later, the insides were worn like the pic.

[stevesnj]

They might be Directional tires. Does it say on the side of the tire if they are?