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[dagolfpro]

Both rear tires are now rubbing and don't know why.

DD is ZCP with 246/265 stock tires. No issues.

Track setup:

Front: TE37SL 18x9.5 ET15 with AD08 265/35/18

Rear: 18x 10.5 ET22 with AD08 295/30/18

Suspension: KW V3 with about 20k miles on them now.

Front Camber is -1.9
Rear Camber is -1.7

Alignment was last done November of 2012.

As I'm getting ready for my first track day this year, I swapped out my wheels 2 weeks ago. First day driving on the freeway, I hit a small dip and heard it rub. It's happened about 3 times since then. It only happens when the rears are compressed (hitting a dip).

Driver side tire took a nail last year so I replaced it with the exact same tire. That's the only thing I changed since I drove with my track setup. So, new tire is 10/32, older passenger tire is 6/32.

Otherwise, I'm running the same tires and wheels. I figured it can't be the new tire as it's rubbing on both sides.

Some suggested that maybe it one of these or all of them:

Alignment is now off
Springs sag?
Struts has gone bad

I'm going to take my car in on Thursday to a suspension specialist. Anything I should have him look into other than alignment, spring sag, struts, and increase camber?

What's the max camber they can do in the rear via the adjustable toe arms?

Thank you in advance.

[slicer]

You need et25 or more for 295's. People seem to get away with 295/30/18's because they are a full 1" shorter than OEM (one of the reasons I don't like them). It must be your ride height. Camber might help. I always ran 285/35/18 on my te37's because they don't rub and they are much closer to OEM tire diameter than 295/30/18's.

[dagolfpro]

Originally Posted by slicer

You need et25 or more for 295's. People seem to get away with 295/30/18's because they are a full 1" shorter than OEM (one of the reasons I don't like them). It must be your ride height. Camber might help. I always ran 285/35/18 on my te37's because they don't rub and they are much closer to OEM tire diameter than 295/30/18's.

Slicer, I ran the same wheels/tires sizes for 8 tracks days before without any issues.

[tlp]

Large wallowing positive g force dips while the car is neutral is the worst. On the track your sways and the general surface smoothness are probably limiting the extreme or sustained wheel movement that induces rubbing. I only rub on 295's with major dips. Everywhere else I'm rub free. Have you taken the same dips before? Did you have anything in the trunk and or a full tank of gas. They all add up.

[dagolfpro]

Originally Posted by tlp

Have you taken the same dips before? Did you have anything in the trunk and or a full tank of gas. They all add up.

Yes, I drove to/from the track with the same setup last year. Truck was empty this time around and full tank of gas just like last year. I've gained 15 lbs since then but I doubt that's enough to change the load.

[MasterP]

Did you change your suspension compression settings?

[dagolfpro]

Update. Took the car into the shop yesterday. They said the rear Camber was -1.5. So, we changed it to -2.0. Hoping this will do the trick. Last alignment was done 11/12 and the camber at that time was -1.8. So maybe that was the problem.

Nothing was changed on the suspension since last year. Two things were different. One new rear tire and new heavier exhaust.