18x8.5 arc-8s square setup for M235i fitment question

pan0205 · 12-16-2014, 02:53 PM

Apex only confirmed that 235/40/18 will fit. Is anyone riding around in 245/35/18s all around?

Westsider45 · 03-26-2015, 05:40 PM

I have been running 235/40s in front and 255/35s in rear for the last few weeks, no problems.

Liquidpaper · 03-26-2015, 06:05 PM

Quote:

Originally Posted by pan0205

Apex only confirmed that 235/40/18 will fit. Is anyone riding around in 245/35/18s all around?

I am riding around in 255/3518's on ARC-8 ET38's.

However, I do have some camber dialed in (I have camber plates) -- more than 2 in the front and more than 1.5 in the back.

rwalker · 03-27-2015, 03:06 PM

I think Ramos is 245 square...

i8ur911 · 03-27-2015, 08:10 PM

I'm doing the same thing....18x8.5 ET45 with 245/35's square. Waiting for wheels to arrive.

Ramos · 03-30-2015, 12:47 PM

Yes I am running 245/35 square on stock suspension however they are 17's not 18's

The wheels are: 17 x 8 ET 40
I'm sure you can do the same thing with 18 inch wheels though.

Ramos · 03-30-2015, 12:49 PM

Quote:

Originally Posted by i8ur911

I'm doing the same thing....18x8.5 ET45 with 245/35's square. Waiting for wheels to arrive.

That is going to rub against the strut I'm afraid.. ET 40-42 is already super close to the strut

i8ur911 · 03-30-2015, 08:48 PM

Quote:

Originally Posted by Ramos

That is going to rub against the strut I'm afraid.. ET 40-42 is already super close to the strut

I think so too. We test fit some 18x9 ET42's at work today and they wouldn't work. I think I'll have to run a 5mm spacer to get the wheel/tire away from the strut.

ocN55 · 03-30-2015, 11:12 PM

I've spoken with someone that has 255s all around with no rubbing issues, 100% stock suspension too

Ramos · 03-31-2015, 02:53 AM

Quote:

Originally Posted by ocN55

I've spoken with someone that has 255s all around with no rubbing issues, 100% stock suspension too

Very unlikely, can't be done without camber, I don't believe that I'm sorry.

rwalker · 03-31-2015, 09:56 AM

Quote:

Originally Posted by i8ur911

I think so too. We test fit some 18x9 ET42's at work today and they wouldn't work. I think I'll have to run a 5mm spacer to get the wheel/tire away from the strut.

From my experience with 18x9et41 D-Force LTW5, you'll need a 6mm spacer at least. If you are successful with an 18x9 effective et37, I'd really like to see the results.

ocN55 · 03-31-2015, 01:10 PM

Quote:

Originally Posted by Ramos

Very unlikely, can't be done without camber, I don't believe that I'm sorry.

Take it or leave it brother

I understand your reaction though, I was surprised when I first heard too. Car is x drive, in case that makes any difference, I wouldn't know...

rwalker · 03-31-2015, 01:20 PM

wow! which brand/model tires are those?

ocN55 · 03-31-2015, 03:25 PM

Quote:

Originally Posted by rwalker

wow! which brand/model tires are those?

some kind of 255 dunlops I believe, not my car haha

255/35/18

18x8.5

Ramos · 03-31-2015, 07:02 PM

Quote:

Originally Posted by ocN55

Quote:

Originally Posted by Ramos

Very unlikely, can't be done without camber, I don't believe that I'm sorry.

Take it or leave it brother

I understand your reaction though, I was surprised when I first heard too. Car is x drive, in case that makes any difference, I wouldn't know...

Well I'm astonished.. From the pictures it does look like it could rub the fender under load! But maybe it doesn't! Good to know
That setup will definitely work with some added camber though!

i8ur911 · 03-31-2015, 09:02 PM

Quote:

Originally Posted by rwalker

From my experience with 18x9et41 D-Force LTW5, you'll need a 6mm spacer at least. If you are successful with an 18x9 effective et37, I'd really like to see the results.

Sorry, I think the post I wrote was confusing.

I should be able to run the 18x8.5 ET45 in the front with a 5mm spacer......not the 18x9 ET42. I'm also looking at the HRE FF15, their new flow formed wheels, in an 18x8.5 ET40 front and 18x9 ET44 rear. I think those would work without spacers.

Sorry for the confusion.

ocN55 · 03-31-2015, 09:41 PM

Quote:

Originally Posted by Ramos

Well I'm astonished.. From the pictures it does look like it could rub the fender under load! But maybe it doesn't! Good to know
That setup will definitely work with some added camber though!

Is it possible that the fact that the car is x drive has to do with anything not rubbing?
I believe they both have the same drop in height based on what people have told me...

benes136 · 04-03-2015, 07:33 PM

Hey OC are those ARC-8's? Anyone do the Hyper Black? Would love to see some pics. Think I'm going Apex wheels staggered but tire fitment is a big concern. Want to stay with Pilot SS's.

ocN55 · 04-03-2015, 08:23 PM

Quote:

Originally Posted by benes136

Hey OC are those ARC-8's? Anyone do the Hyper Black? Would love to see some pics. Think I'm going Apex wheels staggered but tire fitment is a big concern. Want to stay with Pilot SS's.

enkei raijin. apex makes a rear wheel specifically for this car with a 62mm offset, i recommend that if you go staggered

e30if · 04-03-2015, 10:56 PM

Those tires are either Dunlop ZII's or ZII Starspecs which run quite a bit wider than many tires as they are designed for autocross. I'm surprised they fit up front without any rubbing issues, great to know that's a possible setup though!

mibikin · 02-08-2017, 01:54 PM

Sorry to revive an old thread but I'm looking into the Arc-8s in 18x8.5ET38 and was wondering if a 245/40/18 square setup would work on stock suspension? According to wheel-size this should clear the fender and strut no problem but I was just curious if anyone has done it or found a definitive answer.

Ace604 · 02-08-2017, 08:22 PM

I had 245/40/18 conti DW on 18x8 42 ET with m4 LCAs and it would rub the fender on large bumps. Rears were totally fine.

12-16-2014, 02:53 PM	#1
pan0205 Private First Class 23 Rep 112 Posts Drives: '20 BMW M2 Comp Join Date: Dec 2010 Location: Vienna, VA iTrader: (1)	18x8.5 arc-8s square setup for M235i fitment question Apex only confirmed that 235/40/18 will fit. Is anyone riding around in 245/35/18s all around?
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03-26-2015, 05:40 PM	#2
Westsider45 draught tolerant 14 Rep 106 Posts Drives: '17 C63 sedan Join Date: Sep 2014 Location: northern California iTrader: (0)	I have been running 235/40s in front and 255/35s in rear for the last few weeks, no problems.
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03-27-2015, 03:06 PM	#4
rwalker Major 330 Rep 1,084 Posts Drives: the wheels off Join Date: Nov 2006 Location: San Diego, CA iTrader: (1)	I think Ramos is 245 square...
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03-27-2015, 08:10 PM	#5
i8ur911 First Lieutenant 125 Rep 356 Posts Drives: F22 228i MSport Join Date: Jan 2015 Location: NH iTrader: (0)	I'm doing the same thing....18x8.5 ET45 with 245/35's square. Waiting for wheels to arrive.
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03-30-2015, 12:47 PM	#6
Ramos Colonel 863 Rep 2,897 Posts Drives: G20 2020 M340 Join Date: Nov 2007 Location: So-Cal iTrader: (6)	Yes I am running 245/35 square on stock suspension however they are 17's not 18's The wheels are: 17 x 8 ET 40 I'm sure you can do the same thing with 18 inch wheels though.
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03-30-2015, 11:12 PM	#9
ocN55 Lieutenant Colonel 560 Rep 1,503 Posts Drives: '15 M235i 6MT/ '16 M3 Join Date: Dec 2013 Location: LA iTrader: (18)	I've spoken with someone that has 255s all around with no rubbing issues, 100% stock suspension too
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03-31-2015, 01:20 PM	#13
rwalker Major 330 Rep 1,084 Posts Drives: the wheels off Join Date: Nov 2006 Location: San Diego, CA iTrader: (1)	wow! which brand/model tires are those?
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04-03-2015, 07:33 PM	#18
benes136 Private 10 Rep 62 Posts Drives: 2014 M235i Estoril Blue Join Date: May 2014 Location: Los Angeles iTrader: (0)	Hey OC are those ARC-8's? Anyone do the Hyper Black? Would love to see some pics. Think I'm going Apex wheels staggered but tire fitment is a big concern. Want to stay with Pilot SS's.
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04-03-2015, 10:56 PM	#20
e30if Enlisted Member 3 Rep 47 Posts Drives: 1991 318is, 2010 M3 Join Date: Jan 2014 Location: Redmond, WA iTrader: (0)	Those tires are either Dunlop ZII's or ZII Starspecs which run quite a bit wider than many tires as they are designed for autocross. I'm surprised they fit up front without any rubbing issues, great to know that's a possible setup though!
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02-08-2017, 01:54 PM	#21
mibikin New Member 2 Rep 27 Posts Drives: Alpine White M235i xDrive Join Date: Aug 2016 Location: Parker, CO iTrader: (0) Garage List 2015 M235i xDrive [0.00]	Sorry to revive an old thread but I'm looking into the Arc-8s in 18x8.5ET38 and was wondering if a 245/40/18 square setup would work on stock suspension? According to wheel-size this should clear the fender and strut no problem but I was just curious if anyone has done it or found a definitive answer.
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02-08-2017, 08:22 PM	#22
Ace604 Private 11 Rep 92 Posts Drives: 2019 M2C Join Date: Dec 2014 Location: Vancouver iTrader: (1)	I had 245/40/18 conti DW on 18x8 42 ET with m4 LCAs and it would rub the fender on large bumps. Rears were totally fine.
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