|
|
|
KEEP M3POST ALIVE BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER LINK! |
Post Reply |
|
Thread Tools | Search this Thread |
10-15-2008, 06:22 PM | #1 |
Private First Class
38
Rep 117
Posts |
Offsets and clearance?
Ok, I've searched around and come up with the stock settings. But it'd be helpful if anyone knows the additional clearances you have with stock settings to figure out maximum wheel and tire sizes. The E90 post section has a nice calculator, but it's meaningless without knowing how much extra space you have before rubbing with upsizing. I'm looking at this from a track setup where I'd like to put a lot of rubber under the wheel wells and pick a wheel/spacer solution; difficult atm due to both tire and wheel limited selections.
As I understand it, the E90 M3's are setup like this stock: Front: 18x8.5-ET29 running 245/40r18 OR 19x8.5-ET29 w/ 245/35r19 Rear: 18x9.5-ET23 running 265/40r18 OR 19x9.5-ET23 w/ 265/35r19 Bolt pattern is 5x120 So, does anyone know the clearances from the stock settings to the strut tower (inside) and to the exterior wheel arc (outside)? With those numbers, I crunch out the rest to figure out a combo that works. |
10-20-2008, 09:55 AM | #2 | |
Dishonorable Discharged
100
Rep 181
Posts |
Quote:
|
|
Appreciate
0
|
10-20-2008, 11:07 AM | #4 |
BimmerPost Supporting Vendor
9541
Rep 10,839
Posts |
Our current offsets on our E90 M3 are pretty aggressive in terms of outer fender clearance
It's hard to tell in the photo, but this sizing is very close to the outer limit of what's possible on the stock sheetmetal on an E90 M3. The car currently has 20x9 +18 front, and 20x10.5 +18 rear wheels, with 255 and 285 tires in the front and rear, respectively. This setup is very aggressive, and will rub the fenders just a bit. To maximize the amount of tire you can fit under the stock sheetmetal, I'd recommend running a higher offset than this- you'll be able to run beefier tires as a result. I'm not 100% on the inboard clearance on the E90 M3, but can measure this week. Going up in width and raising the offset will allow for you to run as much wheel and tire as possible. I know this isn't exactly the answer you needed, but I hope it at least helps you see how much room you have on the outside of the fender. Once we figure out inboard clearance, you should have a pretty good idea of the maximum sizing you can run.
__________________
|
Appreciate
0
|
10-20-2008, 07:54 PM | #5 |
NASA SpecE30 Racer
82
Rep 1,307
Posts |
I'm looking at trying to get a 305/30/19 on a 19x10.5 +25 wheel. I know there are guys running 315s on a 11 inch wheel, so I hope this will fit.
__________________
King Tut
2012 BMW M3 Individual: Sold lsb.ridedomain.com 1987 BMW 325is SpecE30: spece30.ridedomain.com 2009 BMW M3 Coupe: Sold e92.ridedomain.com |
Appreciate
0
|
10-20-2008, 09:16 PM | #6 |
Veni Vidi Vici
89
Rep 2,750
Posts
Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA
iTrader: (0)
Garage List 2011 e90 M3-Sold [8.50]
2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00] |
I bought a second set of OEM 18 inch wheels. I'm running 18 x 9.5 et23 on all four corners and they clear in the front.
__________________
Dinan compliment of stuff plus PF rotors and RG63s. Enough for now. Why, yes. I am an abrasive bastard. |
Appreciate
0
|
10-21-2008, 07:42 PM | #7 |
Private First Class
38
Rep 117
Posts |
Thanks for all the input.
On the front: So far MarksM has run the widest setup up front with his 18x10 et25 and 285/30r18's. Looking at thread by Sayemthree http://www.m3post.com/forums/showthread.php?t=154323, he noted his setup of 18x9et35 with 5mm spacers (et30) and 265/35/18's had 8-10mm clearance to the strut. MarksM setup would be 1mm tighter to the strut leaving approximately 7-9mm clearance, and 25mm wider on the outside. Ilia@Ind's setup came up 6mm narrower than MarksM on the outside. I'm just guessing the 285 is as wide as it will get without going to fender-rolling. It might be possible to do a 295 with a 20mm offset and rolling the fender... this would give me a 6-8mm clearance to the strut (very tight) and an extra 11mm wider than MarksM's setup, but it'd also throw off the alignment slightly. Does this sound right? How much extra room to the strut do you think I ought to consider if I add camber plates and go a bit more negative? Haven't figured out the rear yet, but it's much less troublesome than the front. |
Appreciate
0
|
10-22-2008, 03:50 AM | #8 | |
Lieutenant
13
Rep 458
Posts |
Quote:
Are you rubbing in the front and rear? I'm thinking about going with 19x9.5 +17 (255-265) front and 19x10.5 +18 (285) rear. I don't plan on lowering the car unless the gap is bad, even then I wouldn't lower it much (1 inch tops). Do you think this setup will rub? |
|
Appreciate
0
|
10-22-2008, 10:17 AM | #9 |
BimmerPost Supporting Vendor
9541
Rep 10,839
Posts |
I believe your front wheels will rub, as our fronts are already quite close. I'd certainly stick with a 255 or smaller tire if I was going to run that aggressive of a width and offset. The 10.5 +18 with a 285 does rub just a bit on our car.
Aggressive offsets are always a bit hard to judge, as exactly how everything will fit will largely depend on the specifics of your exact setup- wheel pad height, true tire section width (advertised width is rarely exactly the actual width of the tire) your car's camber settings, etc... You can fit a 19x9.5 +17 and a 19x10.5 +18, but you're going to have to be willing to adjust ride height, camber, and tire size to fit offsets like that.
__________________
|
Appreciate
0
|
10-22-2008, 02:22 PM | #10 | |
Lieutenant
13
Rep 458
Posts |
Quote:
Many thanks for the informative post. I'm going to have to talk to my wheel guy today. And come up with a plan, supposedly Volk recommends this for an "aggressive" offset. But I'm thinking I need to determine tire size first and then decide rim size. |
|
Appreciate
0
|
10-24-2008, 11:15 AM | #11 |
BimmerPost Supporting Vendor
9541
Rep 10,839
Posts |
Volk is correct in saying that the offset is aggressive- it would fit the car, but would need fairly small, maybe even stretched tires to fit, especially in the front. With the right tire sizing and camber, that setup would fit, and be very very flush. I'd run offsets like that on a street car, but beauty is in the eye of the beholder, and not everyone is into extreme wheel sizing like this.
__________________
|
Appreciate
0
|
10-26-2008, 11:57 PM | #12 |
BimmerPost Supporting Vendor
1754
Rep 7,651
Posts |
The Volk wheels are certainly an aggressive fitment. the rears will fit and with 285 tires and some camber adjustment, the rears may not rub.
As for the fronts, I think that you will definitely need some camber adjustments to make sure that they do not rub, but I don't that it is impossible. 275/30-19's have been fit on the front with 19 - 9.0 +28 offsets before. From just the math, it seems to be almost the same kind of overall width, relative to the hub.
__________________
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|