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      08-09-2011, 05:39 AM   #23
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I went


i think this set up is solid

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      08-09-2011, 02:59 PM   #24
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Originally Posted by persian54 View Post
Would you say a 285/30/18 is too short of a tire? I say this because, as you said "depending on availability," the AD08s don't come in 285/35/18.

Would 295/30/18 AD08 clear (no rubbing anywhere) with a 10.5 low offset?

The square set up you mentioned is a great set up.
Correct, 285/30/18 is shorter than ideal, and can prove to be better or worse in it's gearing change. For someone doing a regular HPDE, it may have no consequences beside a slight change in shift points, and that would depend entirely on the track as to whether it's a positive or negative change. At the 25 hours of Thunderhill there was an E9X M3 with 285/30/18 square on 10's for example.

So if all you can get is a 285/30/18 in the compound you want, then don't let it stop you, unless the front tire size you're going to run is unusually taller, such as a 275/35/18 up front paired with that size rear. Then you'd have a reverse rake, for a car that normally has a noticeably taller rear.
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      12-06-2012, 05:06 PM   #25
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For track use, the tradeoff is between performance and cost effectiveness. A square setup will cost less as you will be able to rotate front/rear. However, a square setup will increase oversteer.
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      12-06-2012, 07:20 PM   #26
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I did 265/35/18, 295/30/18 with my TE37's for the track. Had this setup with both the PS Cups and AD08's and always worked out great for me.
(1:40 @ Laguna Seca, 2:03 @ Thunderhill, 1:52 @ Infineon)
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      12-06-2012, 08:32 PM   #27
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We've had several of our customers do the 18x9.5" ET22 and 18x10.5" ET27 with Hankook RS-3 in 265/35/18 and 285/35/18 when they chose to stay staggered, and they seem to be very content with that. There are also many that go with the 18x10" ET25 squared with 275/35/18 tires as well.
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