track wheel size recomendation - Page 2

Eugene-TAIWAN · 08-09-2011, 05:39 AM

I went

265/35/18
295/35/18

i think this set up is solid

Eddy@ApexRaceParts · 08-09-2011, 02:59 PM

Quote:

Originally Posted by persian54

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.

SP33DRCR · 12-06-2012, 05:06 PM

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.

radiantm3 · 12-06-2012, 07:20 PM

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.

David@ApexRaceParts · 12-06-2012, 08:32 PM

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.

08-09-2011, 05:39 AM	#23
Eugene-TAIWAN Brigadier General Drives: E92 M3 Coupe Join Date: Jun 2009 Location: Taiwan Posts: 3,103 iTrader: (4)	I went 265/35/18 295/35/18 i think this set up is solid __________________ Past: Gintani stage3 M3 present: Porsche 993, 964,997.1 GT3, Panamera Turbo waiting to be delivered 2015: Porsche 991 GT3RS

12-06-2012, 07:20 PM	#26
radiantm3 AWD...training wheels for RWD Drives: 11 E92 M3, 13 F25 X3 xdrive35i Join Date: Sep 2008 Location: Fremont, CA Posts: 3,145 iTrader: (5) Garage List 2011 E92 M3 [4.75] 2013 BMW X3 xdrive35 [4.25]	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. __________________ 2011.5 E92 M3 6MT / 45,000+ miles / 3400lbs with no driver, half tank / M3 GTS Aero, Rear Seat Delete, Half Cage • Schroth 6 Point Harness • Recaro Profi • 18" BBS FI / 18" TE37SL Black Edition • Ohlins RT • Vorshlag Camber Plates • Brembo 380GT • Endless Pads • Akrapovic Evo • RD Sport Sways • ESS Tune • Supercharger Delete (1:42 @ Laguna Seca, 2:09 @ Thunderhill, 1:56 @ Infineon)

12-06-2012, 08:32 PM	#27
David@ApexRaceParts BimmerPost Supporting Vendor Drives: M3 Join Date: Jun 2012 Location: Bay Area Posts: 486 iTrader: (0)	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. __________________ \| David D. \| 888.499.9135 x802 \| david@apexraceparts.com \| Facebook \| Blog \|

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12-06-2012, 05:06 PM	#25
SP33DRCR Enlisted Member Drives: '09 E92 M3 Join Date: Sep 2012 Location: Bay Area, California Posts: 31 iTrader: (0)	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.