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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 03-22-2017, 09:04 PM   #1
cbaclawski
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advice on wheel/tire size for track

Hi,

I have a 2003 330i sedan that is a track only car. It originally came with the "sport package", but now has a modified suspension setup, and sits about 1 inch lower than stock.

It currently has 17" rims and 225 tires. I want to get some lighter weight wheels, and stick with 17's.

What width wheel should I get, 8" or 8.5", and what size tire would you recommend? 245 all around, stick with 225, 235 rear 225 front? offset? I'm kind of lost...

I am looking at these so far:

https://www.tirerack.com/wheels/Whee...Package#survey

Keep in mind that this is a track only car (though I do plan to keep it street legal)

Last edited by cbaclawski; 03-22-2017 at 09:06 PM.
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Old 03-22-2017, 09:16 PM   #2
Bilonix
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Wheels are confusing. I don't understand it either. I just get my local shop to put on tires and **** for me.
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Old 03-23-2017, 12:15 AM   #3
gonzo08452
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Old 03-23-2017, 12:30 AM   #4
YoitsTmac
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Depending on you rim width that you settle with will choose your tire size. I would go for 4x8.5 17"s. You would run 245/40/17's


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Old 03-23-2017, 07:42 AM   #5
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Paging Rob43.....

The general consensus seems to be a square setup is best for track duty.
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Old 03-23-2017, 09:09 AM   #6
CylonRed
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Quote:
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Paging Rob43.....

The general consensus seems to be a square setup is best for track duty.
Correct - more neutral. The stagger creates natural understeer.
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Old 03-23-2017, 09:21 AM   #7
Geo31
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If this is truly a track only car, and not a race car (which must comply with the rule book), I'd get the add-on fender flares and jam in the widest wheels I could without having stretch and poke or stupid camber. Then, I'd choose tires based upon the wheel width. With using flares, I'd look hard at the variety of widths and offsets available for factory M-Parallels. They are 18" but they are forged so they will be stronger and lighter than cast wheels.

IIRC you can get M-Pars up to 9.5" wide.
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Old 03-23-2017, 09:35 AM   #8
Njohc
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A very common wheel setup for the e36/e46 chassis are 17" Kosei K1's that are 8.5" wide. Theyre light, decently strong, and cheap wheels that should fit with just a 10mm spacer up front. Hankook RS3's are a very good track oriented tire that are on closeout. 245/40-17 size will fit perfectly on that wheel. You definitely want a square setup no matter what route you go.

Ive actually found it easier to drive on track with a 225 setup on good sticky street tires. They give you a bit more communication through the steering wheel, and provide a bit less overall grip. Lower limit situations are a lot easier to overcome if you are still new to HPDE's.

Last edited by Njohc; 03-23-2017 at 09:37 AM.
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Old 03-23-2017, 10:10 AM   #9
shanneba
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I went with 4 Apex ARC8179ET42HS ARC-8 17X9 ET 42 and run 245 40 17 tires on my 330Ci.
The Apex wheels are about 16.5 lbs. No spacers used.
17 inch tires are less expensive.

https://www.apexraceparts.com/shop-b...c-8-wheel.html
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Old 03-23-2017, 09:36 PM   #10
cbaclawski
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Thank you to all. I think 17x8.5 245 40 17 seems like the way to go (since those k1's are so cheap). It really is a "track" car, and not a "race" car so no rulebook to be concerned with.

Someone mentioned 10mm spacers, I assume those go between the wheel and the hub and the lug bolts go through? I really don't want to have to do any bodywork...
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Old 03-23-2017, 11:01 PM   #11
YoitsTmac
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just google it

It is not a body work thing, it is just a part to adjust how much outwards the wheel are
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Old 03-24-2017, 12:57 AM   #12
SK330ci
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Quote:
Originally Posted by Spannerhead View Post
Paging Rob43.....

The general consensus seems to be a square setup is best for track duty.
yep, i talk with him occasionally and get pointers like these.

op, a square setup is the way to go, those 17x8.5 kosei k1's are a true bargain. Opinions vary but it's my opinion that you should run a semi-Rcomp tire, two great choices are the toyo R888R (less wet conditions) or the toyo RA-1 (more wet conditions) both in a 235-40-17. Remember that a 235-40 rcomp is almost always bigger than a 245-40 street tire and usually equal to a 255-40 street tire in tread width. a 235-40 rcomp also gives you a better final drive gear advantage, plus a 1 or 2 pound unsprung weight advantage over a 245 / 255-40 street tire most of the time.
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