OT: Wacky WRX tire wear, So much for those wear bars! Options

[bondo]

I had noticed the rear tires on the WRX (Julie's daily driver) were getting near the wear bars. The fronts were not quite there yet. We decide that new tires are due in the near future, but haven't gotten around to getting them.

So last weekend we drive to Riverside and back (approx 450 miles). On the way down I notice a bit of vibration around 75 mph. Knowing new tires are due, I figure it's that and assume it will go away when we get new tires. On the way back, it's a little worse. Then it starts to really rumble arould 70 mph, but only on very slight right turns (a gradual lane change on a straight part of the freeway does it, but tighter turns don't)

So when we get gas (about 10 miles from home) I decide to take a close look at the front end. I thought maybe a bearing or suspension component was bad, as the wear bars are all unworn all the way across on both front tires. When I grab the tire to do the "tech inspection" wheel wiggle, I cut my pinkie on something sharp. So then I turn the wheel all the way to the left (I'm looking at the left front tire) so I can see the inside edge.. and it's showing belts! I did the same on the other front wheel and it has the same problem, but to a lesser degree.

Now I know bad camber can cause uneven wear.. bit the wheel looks straight. I checked it with a framing square, and the top is only about 3/16" in from the bottom on the left side, and maybe 1/8" on the right. I have driven cars with much worse camber problems and they didn't wear THIS unevenly. The car stracks straight, and doesn't get bad gas mileage (25 mph on the highway, good for a WRX), so I don't think it's a toe problem. We have been known to take corners fast, but in my experience that wears the outside edge of the tire, not the inside. Maybe the all wheel drive somhow factors into this?

Ok, enough text, time for some pics.

First pic: Wear bars all the way across (It's nearly impossible to see this wear with the wheel pointed straight)