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View Full Version : Wheel/Tire size delima


youngdc
05-19-2005, 08:11 PM
Help! I have a 2005 M3 daily driver that sees just about as many track miles as it does commuter miles. I've decided it would be a good idea to obtain a set of wheels and tires to be used strictly at the track. I've been told (by reputable sources) that putting the same size tire and wheel at all four corners can dramatically reduce cornering push and provide a better overall dynamic balance. Unfortunately, those sources are not E46 M3 drivers and they could not recommend a specific wheel/tire size applicable to my vehicle. My question is, what is the optimum track tire/wheel size for an E46 M3 shod identically at all four corners? Does anybody know where that E46 M3 sweet spot is? Opinions? Experiences? All response are appreciated.

Cowboy Bebop
05-19-2005, 08:38 PM
I would recommend 265 all round on 18's (or 17's) as track wheels.
Volk LE37 or RAC RS110 would be excelent wheels to go with.

obmd1
05-19-2005, 08:42 PM
This is may be a bit off this thread, but insofar as wheels/tires sizes go for the M3....

I drove it with 19's and think its just too much for a daily driver. Anyone have 18's having driven it with 19's? How mush difference is there?

I can't even FIND one anywhere to drive without 19's on it..... my local guy's brought allhis in with them preordered with the bigger wheels. :dunno:

I'm gonna call around tomorrow, but I wanted to know what you all thought.

youngdc
05-20-2005, 07:14 AM
Thanks for the input Cowboy. I called Tire Rack, and after some encouragement on my part ("Gee, most people just go with the staggered sizes" - but most people don't track their car do they?) they finally said that 265/35-18 tires on 18x9.5 rims w/ 35mm offsets were the way to go. Since the stockers are 225/45 on 18x8 in front and 255/40 on 18x9 in the rear, I thought 265's sounded a bit large for the front. Will I have any clearance problems with that tire size in front through the full range of suspension travel? I guess the 35 series saves me a half inch in diameter, but it's almost three quarters of an inch wider which makes me a bit neverous about clearance. I'm not anxious to bruise my new baby by squatting the fender on the tire because I got too friendly with the FIA curbing.

Nick325xiT 5spd
05-20-2005, 07:22 AM
285/30-18 all around.

http://teamwtf.org/gallery/albums/album22/pics_046.sized.jpg

bren
05-20-2005, 07:31 AM
Do you have camber plates?

youngdc
05-20-2005, 02:52 PM
No camber plates (yet) as it's still all stock. It's not even two months old, but I've already shredded the fronts with just three trips to the track (Are ContiSportContacts know to chunk easily?).

bren
05-20-2005, 03:16 PM
Conti's are terrible.

You'll want camber plates or you're still going to only be running on the edges of whatever size tires you put up front.

Cowboy Bebop
05-20-2005, 09:11 PM
you didn't mention or failed to infer in your post if you have a ZCP or just the regular M3?
if just the regular, then you are definitely going to want to sawp out the suspension and add some camber plates if you plan on tracking the car at the rate you are already.

if you do that, you will not have any trouble with the 265 square set-up.
HTH

youngdc
05-21-2005, 07:16 AM
Displaying my ignorance, I'm going to guess that ZCP is the designator for the competition package. Mine's just a regular M3 (is "regular M3" an oxymoron?). From this and other threads, I'm getting the impression that you're correct about the camber plates being in my future Cowboy. I'm trying to be patient about mods since it doesn't even have 3K miles on it yet, but I'll probably be quicker on the trigger after I eat up another couple sets of rubber. Do I have to rebuild the entire front suspension when I go to camber plates, or is that something that I can do piecemeal by starting with adjustable plates and adding more later when I'm ready?

Cowboy Bebop
05-21-2005, 12:21 PM
Displaying my ignorance, I'm going to guess that ZCP is the designator for the competition package. Mine's just a regular M3 (is "regular M3" an oxymoron?). From this and other threads, I'm getting the impression that you're correct about the camber plates being in my future Cowboy. I'm trying to be patient about mods since it doesn't even have 3K miles on it yet, but I'll probably be quicker on the trigger after I eat up another couple sets of rubber. Do I have to rebuild the entire front suspension when I go to camber plates, or is that something that I can do piecemeal by starting with adjustable plates and adding more later when I'm ready?

"Z" = Option in BMW speak...more or less, and CP is indeed the Comp Package.

As to the rest of your question... there is no har or fast rule about how you go about doing the susp upgrade, It is no biggie either way.
that is except that you are going to have to remove the struts to add the plates nyway so many of us just bite the bullit and do it all in one go.
FYI, I had fewer miles they you currently have when I swappedthe whole susp out.

of course you don't "Need" to go with a suspension upgrade, but if you are serious about the car, and the track you are really going to want to swap the thing out.
that is just my opinion, but I think you will find it pretty much universally supported by other track dogs. :thumbup: