Uneven inner tire wear

[BSOD2600]

8 months ago, when I slapped on my 'new' WRX rims and the semi used RE92's, I got an alignment from les schwab. The before/after alignment numbers barely changed, so seems like stuff is pretty stable.

Fast forward to today. Crawling under my car to replace the rocker cover gaskets and washers I noticed major inner wear on both tires.

Left:


Right:


When I jack the front center of the car up and the wheels leave the ground, the bottom of the wheel angles in some. I assume this is normal.

Whats with the inner wear? I need another alignment already or thats just how these cars wear tires when spiritly driven around town?

[Legacy777]

Typically spirited driving wears the outer part of the tire, which is why more negative camber is recommended so the outer & inner wear due to more negative camber help cancel each other out.....not to mention the extra grip due to more negative camber.

What were your alignment numbers?

[BSOD2600]

The numbers were:

Left front:
Camber: -0.2*
caster: 3.6*
toe: -0.02"

Right front:
Camber: -0.1*
caster: 3.2*
toe: -0.01"

Front totals:
toe: -0.03"
cross camber: -0.10*
cross caster: 0.40*

Front setback: -0.20*
Rear Setback: -0.60*
Thrust angle: 0*
S.A.I.: 14.4*

Left rear
Camber: -0.9*
Toe: 0.02"

Right rear:
camber: -0.8*
toe: -0.03"

[Legacy777]

Get rid of the toe on all corners.

[BSOD2600]

That little bit of toe (which I thought was recommended?) is causing the inner tire wear?

[GodSquadMandrake]

I do my own alignments because I have experienced that shops, even with their laser alignment racks, can't do as good of a job as I can with a measuring tape, bubble level, and my trusty spanner. It just takes some hard work and know how.

[Dynamic Entry]

did you possibly recently re-mount the tires and the outsides became the insides?


....

cuz no camber makes inner wear weird

?

[ultrasonic]

The tires could have been unevenly worn prior to putting them on your car. Now, after wearing the tread down even more, the uneven-ness becomes visually apparent. At least it's a possibility. I don't know if that little amount of toe would cause that wear pattern, but toe should certainly be as close to zero as possible.

[Apex3]

I wouldn't pay too much attention to the numbers they give you. I went to firestone 6 times, and they never once got it right, every time they gave me some badly off number, and a new fixed number, and every time the alignment didn't change at all in reality.

It's most likely the toe that's causing this. It's a common misconception that camber causes that, but it does not, at least not to that extent.

[BSOD2600]

Well the point is now moot for that car and wheels since it's wrecked...

[Apex3]

Oh wow, I need to start paying attention to post dates, forgot how slow this forum moves. Sorry about the wreck though...

[shtbxr22]

my $0.02: toe kills tires. I see it almost everyday at work. even something as small as .08 degrees off will eat 'em up. if you live in a badly paved part of the country I would recommend an alignment about every 6 months. I do mine every few months, and it is usually tipping in on being out of spec.