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      02-25-2019, 12:58 PM   #1
Fudo
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235 Square Setup

I just bought some rims that are 18x8.5 et35, and I've been seeing a lot of pictures that are running somewhat similar setups. Most are 18x8 et35-40 running 235/40R18. Will 18x8.5 et35 run 235/40R18 just as well? Or will I need some sort of camber mod to avoid rubbing? I have a 2015 228i on stock sport suspension. What do you guys think?

I know that 225/40R18 is the typical tire to buy, but I would like some more meat width and/or height. If I do have to go 225, can I go 225/45R18? I know the roll rate will be a bit different, but I think I rather have the ride comfort.
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      02-25-2019, 01:35 PM   #2
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The 235/40/18 tire could cause rubbing in the front on an 18x8.5 ET35 wheel under certain conditions like U-Turns or speed bumps. The higher profile 225/45/18 has been done on stock wheels without any issues, but would likely rub on the new 8.5 ET35 specs.
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      02-25-2019, 03:18 PM   #3
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I'm on 18x8.5 ET38 square running 235/40 federals which for more like 245s. Dinan springs as well and no rubbing.
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      02-26-2019, 11:49 AM   #4
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Quote:
Originally Posted by ifobd View Post
I'm on 18x8.5 ET38 square running 235/40 federals which for more like 245s. Dinan springs as well and no rubbing.
Do you know the model of your Federals?
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      02-26-2019, 11:51 AM   #5
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I'm a little worried going the extra 3 mm out that it will cause rubbing with these tire specs, but I'm not big on the stretched tire look of the 225.
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      02-26-2019, 02:23 PM   #6
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Quote:
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I'm a little worried going the extra 3 mm out that it will cause rubbing with these tire specs, but I'm not big on the stretched tire look of the 225.
I have a m235, so not sure if the suspension/clearance is different but Im running Michellin A/S 3+ 235/40/18 on 18x8.5 et34 with very minor rubbing. I have heard it rub maybe 3 times in the 6 months I ran it. I was originally planning to roll it if it got on my nerves but its pretty infrequent.
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      02-26-2019, 04:05 PM   #7
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That's really reassuring hearing this from you guys. I think I'll try it and post some pictures after I get it done.
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      02-26-2019, 11:32 PM   #8
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worst case get some spacers.
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      02-27-2019, 10:55 AM   #9
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True, but the poke might be a bit excessive at that point.
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      02-28-2019, 07:01 AM   #10
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Quote:
Originally Posted by Fudo View Post
Quote:
Originally Posted by ifobd View Post
I'm on 18x8.5 ET38 square running 235/40 federals which for more like 245s. Dinan springs as well and no rubbing.
Do you know the model of your Federals?
Quote:
Originally Posted by Fudo View Post
Quote:
Originally Posted by ifobd View Post
I'm on 18x8.5 ET38 square running 235/40 federals which for more like 245s. Dinan springs as well and no rubbing.
Do you know the model of your Federals?
595-RSRR
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      04-18-2019, 10:34 AM   #11
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595-RSRR
Thank you!
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      05-26-2019, 12:00 AM   #12
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235 Square Setup

I have finally set on a set of wheels that took me a while to refinish. I ended up with BBS RX 206, 18x8, et38. I wrapped them in 235/40/18 Michellin Pilot Sport A/S 3+. I get minimum rub, only when I hit and bottom out, it's really not bad. There isn't a need to roll my fenders, I'm happy how they turned out. I know there are a lot of questions about fitment and square setups, I hope this helps.
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Last edited by Fudo; 05-26-2019 at 12:04 AM.. Reason: Adding pictures
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      05-26-2019, 12:07 AM   #13
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I'm not really sure why the pictures are flipped. I guess it's cause I took the photos on my phone vertically...just odd. I can't seem to fix the upload, my bad.
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      05-26-2019, 08:10 AM   #14
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Several Calculators online

Quote:
Originally Posted by VMRWheels View Post
The 235/40/18 tire could cause rubbing in the front on an 18x8.5 ET35 wheel under certain conditions like U-Turns or speed bumps. The higher profile 225/45/18 has been done on stock wheels without any issues, but would likely rub on the new 8.5 ET35 specs.
There are several "Will they fit calculators" online. They are probably a good indicator. Here is one of many.

http://out.easycounter.com/external/willtheyfit.com

As info, I run 8x18" offset 42 wheels on all four wheels with 245/35/18 tires without rubbing. 228i with THP.
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      05-26-2019, 09:23 PM   #15
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Quote:
Originally Posted by ralawren View Post
There are several "Will they fit calculators" online. They are probably a good indicator. Here is one of many.

http://out.easycounter.com/external/willtheyfit.com

As info, I run 8x18" offset 42 wheels on all four wheels with 245/35/18 tires without rubbing. 228i with THP.
I have a 2015 228i with M Adaptive Suspension as well, no problems with U-turns or regular driving. Only minimum rub on big bumps, which I was probably driving too fast on anyways. But, I love the look and feel of the car, it just has a more aggressive stance that the car needs.
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