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The Tire Rack's Tire & Wheel Forum
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Old 05-04-2010, 03:15 PM   #1
Automaton111
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18x8 square on an e46 M3 using stock wheels?

Can you run the stock 18x8 front wheels in a square configuration on an e46 M3 if you use spacers in the rear? Does anyone have pics of such a setup?

If not, can the stock 18x9 rear wheels work in the front? Or is the offset a problem?
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Old 05-04-2010, 03:21 PM   #2
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I would run 18x9 all the way around if you are set on running square setup. The stock 18x9 rear will work just fine. just add spacers in the rear to give it a little staggered look.
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Old 05-04-2010, 03:21 PM   #3
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8" wide on tha back of a 321bhp RWD car, do you really want to do that?
my lil 328 was overwhelming 225s on the back. imagine what a M3 would do. they TC light would flash all day.

i think a lot of guys are running 9s up front and 9.5 or 10s on M3s and runn 255/35s at all 4 corners, with no trouble. it look into that. 18x9s all around would be better.
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Old 05-04-2010, 03:24 PM   #4
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Yes you can technically run the 8" wheel front and rear with a spacer in the rear, but you will be undersizing your rear tire from even the stock setting. The car comes stock with 255's and I wouldn't recommend more then a 235 on an 8" rim, so that's a serious down grade and will result in oversteer.

The stock 9" rear wheel can work in front, but it will not just bolt on with a 255 and fit properly. You will need camber plates up front to add enough negative camber to fit under the fender. I would prefer the second option if your car is setup with the right parts, but both are honestly a compromise as even the second option is not maximizing the space available front or rear for more wheel and rubber.
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Old 05-04-2010, 03:32 PM   #5
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I don't actually own an M yet, so that's why I'm asking. I'm hunting for the one that fits my requirements. But I'd like to be able to rotate tires front to back, unless by some chance the stock setup wears evenly on all tires without rotating (which I've never seen happen on a car).
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Old 05-04-2010, 03:34 PM   #6
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if your car is on stock suspension and u were gentlle with the gas pedal (which u wont ) the rear would be almost even.
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Old 05-04-2010, 04:03 PM   #7
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I use stock 18x8 square with 225/45 as a winter setup. 20mm spacer is needed in the rear.
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Old 05-04-2010, 04:19 PM   #8
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Yes you can technically run the 8" wheel front and rear with a spacer in the rear, but you will be undersizing your rear tire from even the stock setting. The car comes stock with 255's and I wouldn't recommend more then a 235 on an 8" rim, so that's a serious down grade and will result in oversteer.

The stock 9" rear wheel can work in front, but it will not just bolt on with a 255 and fit properly. You will need camber plates up front to add enough negative camber to fit under the fender. I would prefer the second option if your car is setup with the right parts, but both are honestly a compromise as even the second option is not maximizing the space available front or rear for more wheel and rubber.
Anyone have pictures with the 9" rear all around? I've never seen it before.
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Old 05-04-2010, 04:30 PM   #9
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So the way to go for rotatable tires and minimal hassle seems to be four aftermarket 18x9" wheels with proper offset for the front, and run spacers in the back.
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Old 05-05-2010, 07:23 PM   #10
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18x9.5 LTW's square setup with Advan A048's - stock suspension. 10mm spacer to be added to the rears, but not necessary.



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Old 05-10-2010, 10:38 AM   #11
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would you rub running 255/40/18 in the front? i wanna do a square setup but want a thick tire. i just sold my 19s to get a smaller wheel but more comfortable ride.
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Old 05-10-2010, 12:29 PM   #12
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would you rub running 255/40/18 in the front? i wanna do a square setup but want a thick tire. i just sold my 19s to get a smaller wheel but more comfortable ride.
i have 18x8.5 with 245/40 up fronT on my SEDAN, ET40, didnt rub at all, and had LOTS of room left... added 12mm spacers, and im not at ET 28 with the same wheels, and i rub a little, in driveways and steep ramps while turning.

I will say with confidence, you can run 255/35s up front on a M3 with a 18x9s with the right offset. Id guess at ET38-35
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Old 05-10-2010, 03:19 PM   #13
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hmm. true true. maybe if i run some negative camber itll work. thanks buddy.
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Old 05-10-2010, 04:00 PM   #14
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If you do it right (offset) you won't even need to add any more negative camber than the M3 comes with, and my car is lowered about 2" in the front. I think if I ran ET35 I could fit 255/35 easily. M3s have. Tad more fender room, so you should be ok with stock camber settings even. I think aim for ET35 with those 9s and you'll be good to go. With you starting with et40, its easy, as all you have to do is work your way outwards to clear the struts
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Old 05-10-2010, 04:30 PM   #15
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very knowledgeable man snikwad. haha so im going to pick your brain a little more. so for instance, i think i might run the TR MT1s 18x9.5's with an ET of 35mm....my csl's are 19x8 ET 47 front and 19x9.5 ET 27. i run 225/35 fronts and 255/35 rear. i can see i have plently room before i rub anything, but i feel a 255/40 might be a little thick for the front.

orrr should i just say screw it and go 18's with a staggard fitment, which i dont really wanna do but if its gonna alow me to run a thicker tire with no problems i am.
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Old 05-10-2010, 04:41 PM   #16
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8" wide on tha back of a 321bhp RWD car, do you really want to do that?
That would be an ideal setup during the winter for those of us who run winter tires (narrower the better for snow), but considering he is from Los Angeles, you raise a good point.
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Old 05-10-2010, 04:44 PM   #17
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very knowledgeable man snikwad. haha so im going to pick your brain a little more. so for instance, i think i might run the TR MT1s 18x9.5's with an ET of 35mm....my csl's are 19x8 ET 47 front and 19x9.5 ET 27. i run 225/35 fronts and 255/35 rear. i can see i have plently room before i rub anything, but i feel a 255/40 might be a little thick for the front.

orrr should i just say screw it and go 18's with a staggered fitment, which i dont really wanna do but if its gonna alow me to run a thicker tire with no problems i am.
yes, but thats a 8" wide, you figure all else being the same, width, offset, that 9" would be 0.5" wider on BOTH sides than your CSL's.
So if you have more than .5' room inside, and enough 'shoulder room" on the tire to account for the wider, more square rubber. then you could probably run 9s with that offset, but i cant imagine that.

IIRC, you said the rims were ET40, then mount them w/ said 255/35 rubber take it for a spin and see whats up. Check on turns, full lock, and your driveway incline. Thats how i check how much room i really have, its a safe way to compress the suspension at each corner in a safe, slow manner.

but i really think that et35 will be money. Guys have dont it, with 9s and 255s up front, im baffled why none have chimed in yet on their exact setups.
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Old 05-10-2010, 04:45 PM   #18
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That would be an ideal setup during the winter for those of us who run winter tires (narrower the better for snow), but considering he is from Los Angeles, you raise a good point.
only he never once mentioned winter setup. why u guys keep bringing it up.
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Old 05-10-2010, 04:47 PM   #19
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here you go, str8 MONEY....

http://www.m3post.com/forums/showthread.php?t=314768


talk of 10" wide up front on M3s in that thread ^
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Old 05-10-2010, 05:02 PM   #20
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only he never once mentioned winter setup. why u guys keep bringing it up.
Perhaps my post was too long, you appear to have overlooked my last comment.
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