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2xx/30/18 Square Setup

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Old May 1, 2017 | 01:10 PM
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Alexander K
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Default 2xx/30/18 Square Setup

Hello,

Was curious if anyone is running a similar square setup. My only worry was running the 30 in the rear as its circumference will be about 11% smaller than stock. I'm getting DW's and there were a lot of complaints about a soft sidewall. I thought running a lower aspect ratio would help with responsiveness, as well as lowing the car about an inch without effecting geometry. Not worried about AH as I never run with it on. Cosmetics would be a bit of a concern.

Let me know what you think as its the same price for 2xx/40/18 tires.
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Old May 3, 2017 | 03:06 PM
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Lots of people run a square set up for autocross and road racing. Check out that forum for more answers.
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Old May 4, 2017 | 09:31 AM
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Alexander K
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Thanks YLO z06 but my concern was not in running square but running the 30ar tires which are smaller than oem. The wheel would be about 11% smaller in circumference.
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Old May 4, 2017 | 11:17 AM
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I run 295/30/18 square setup with no issues whatsoever, and I've driven the car pretty hard to test. You won't have an issue.

However, I did swap the front wheels with another set that had 35 or 40 series on the front just to test some noises I was hearing. Don't do that. The car was VERY unhappy. It was fighting me just to go in a straight line, then I could feel it tug a corner and the system faulted out. It wasn't an issue when I simply turned off TC/AH. So...just pay attention to what you mount on the car. Simple as that.

Last edited by Quickshift_C5; May 4, 2017 at 11:18 AM.
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Old May 4, 2017 | 01:46 PM
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Originally Posted by Quickshift_C5
I run 295/30/18 square setup with no issues whatsoever, and I've driven the car pretty hard to test. You won't have an issue.

However, I did swap the front wheels with another set that had 35 or 40 series on the front just to test some noises I was hearing. Don't do that. The car was VERY unhappy. It was fighting me just to go in a straight line, then I could feel it tug a corner and the system faulted out. It wasn't an issue when I simply turned off TC/AH. So...just pay attention to what you mount on the car. Simple as that.
Thanks! got any pictures of the car? curious to see what the car looks like on 30ar. Especially if you're lower than oem height
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