Peter,
That's interesting. The 911 had a huge number of different wheels
available standard, and separately orderable rather than as part of a
package. I guess I have heard of limits on wheels only available as
a package to be used only if the whole package is used. But are you
sure that's really true with respect to wheels?
OTOH, I'm not sure either. I wrote Howard Duncan for a clarification,
and I'll publish it when and if he answers.
Jerry
Jerry Mouton mailto:jerry@moutons.org Laissez les bons temps
rouler!
----- Original Message -----
From: "Thana, Peter {High~Palo Alto}" <PETER.THANA@ROCHE.COM>
To: "'Jerry Mouton'" <jerry@moutons.org>; "Mike Eynon" <stingray@onth.com>;
<ba-autox@autox.team.net>
Sent: Thursday, April 26, 2001 3:06 PM
Subject: RE: M3 tire question
> Jerry,
>
> You mean tires, not wheels, right? From the only copy of section 13.4 I
can
> find on the web (on your server):
>
> 13.4 Wheels
>
> Any type wheel may be used provided it complies with the following: it is
> the same width and diameter as standard, and as installed (including wheel
> spacers if
> applicable) it does not have an offset more than +/- 0.25 inch from a
> standard wheel for the car. The resultant change in track dimensions is
> allowed. Vehicles
> originally equipped only with 12 inch diameter wheels, may use 13 inch
> diameter wheels of the same width as standard and offset within +/- 0.25
> inch of
> standard.
>
> Where the definition of standard is:
>
> 12.4 Standard Part
>
> An item of standard or optional equipment that could have been ordered
with
> the car, installed on the factory production line, and delivered through a
> dealer in
> the United States. Dealer-installed options or deletions, except as
required
> by factory directives, no matter how common or what their origin, are not
> included in
> this definition. This definition does not allow the updating or backdating
> of parts.
>
> End quote.
>
> So it seems clear to me that to run in stock you must use wheels of the
same
> width and diameter as what was available on your car, either standard or
as
> a factory option. Offset can vary, but only by +/- 0.25 inch, which isn't
> much. Also, if your car was available with a different size wheel as part
> of a "sport package" that included other upgrades, all those upgrades and
> not just some of them must be done. Since the M3 came with
17x7.5F/17x8.5R,
> that's what you have to use. You can't even switch them front to back,
I'm
> pretty sure.
>
> What is *not* restricted is tire size, provided the tires fit the rims and
> don't stick out past the fenders when viewed from above.
>
> Peter
>
>
>
>
> -----Original Message-----
> From: Jerry Mouton [mailto:jerry@moutons.org]
> Sent: Thursday, April 26, 2001 2:13 PM
> To: Mike Eynon; ba-autox@autox.team.net
> Subject: Re: M3 tire question
>
>
> Mike,
>
> I can't help too much with your M3 questions, but
>
> I thought I'd mention that I believe that based on the
> stock class rules, it's not necessary to go with the same
> stagger front to rear that the car came with. The rules
> allow ANY wheel of a size near what was shipped with the car,
> and it's not in the class of "a complete option set", as the
> rule allows wheels that are not of the exact same size, even,
> that was offered on the car. I run same size front and rear,
> as do most 911 drivers I know. Some Corvette guys have run
> bigger tires on the front. Your note seems to imply you
> believe this, too, but there have been other notes that
> seem to imply you have to match what was on the car
> in the showroom -- not true, says I
>
> Not that it's anything other than my opinion, but there it is...
>
> Jerry
>
> Jerry Mouton mailto:jerry@moutons.org Laissez les bons temps
> rouler!
>
> ----- Original Message -----
> From: "Mike Eynon" <stingray@onth.com>
> To: <ba-autox@autox.team.net>
> Sent: Thursday, April 26, 2001 1:56 PM
> Subject: M3 tire question
>
>
> > I posted a half question yesterday about this, and got no definitive
> answer,
> > so I thought I would post it again stated a little more directly.
> >
> > <BTW, thanks for all who responded to yesterday's mail>
> >
> > I want to run a set of racing tires on my '98 M3, and no... I really
don't
> > care about losing my novice standing (Playing with the big kids is how I
> > improve the fastest). I have taken the list's advice and gone in search
> of
> > Kumhos. After the comments yesterday, coupled with a little more of my
> own
> > research on the web, I agree that these are likely my best choice right
> > now... but what size?
> >
> > Right now I am running the stock staggered setup -- 225/45 R17 in front,
> and
> > 245/40 R17 in the rear. Kumho actually makes both those size tires with
> the
> > exception that the 245 is a 245/45 R17, and I do plan on getting 17 inch
> > rims for my race wheels. Enter my dilemma...
> >
> > The way I see it, I have 3 options --
> >
> > 1. Get the same size tires that I am running now. These are sure to fit
> > without damaging the car, but they come with the same problems that I
have
> > now... mainly that I cannot rotate them.
> >
> > 2. Get 245s all around. This sounds great, but I am not sure that they
> will
> > fit. Besides the extra width, the Kumhos are about .6 inches greater in
> > diameter... and I don't have all that much room under the front wheel
> well.
> > I would definitely need to talk to someone who has direct experience
with
> > this before doing it. The last thing I wanna do is have to send 2
wheels
> > back, or have to sell them myself.
> >
> > 3. Run 225s all around. This sounded funny to me until my friend
pointed
> > out that the tread width on the 225 Kumho is nearly a half inch wider
than
> > the tread width on my 245 Potenza S02 PP street tire (according to the
> > TireRack tables).
> >
> > Anyone...? I was hoping to get this figured out in time for the next
race
> > down in Marina (2 weeks) but unless someone has a solid recommendation,
I
> > may be waiting a little longer. My prefered (if I knew they woudl fit)
> > woudl be 245s all around; but right now I am willing to settle for the
> > staggered setup.
> >
> > // Mike Eynon
> > // Chief Technology Officer
> > // OnTh Wireless
> > // "The Wireless Database Company"
> > // 1366 Bulb Ave
> > // Santa Cruz, CA 95062
> > // stingray@onth.com
> > // 831.588.2388 (cell)
> > // 831.621.9402 (voice mail & fax)
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