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      01-17-2022, 02:11 PM   #1
jLona240
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Wheel & Tire fitment question for a M240 xDrive.

I'm looking at 18x8.5 wheels and 245/35 tires, squared. Pilot 4S

What offset do I need without rubbing on stock suspension? ET35 or ET45?
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      01-17-2022, 03:01 PM   #2
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Excellent question. I want to do the same and after many hours of searching these forums I have yet to come up with a concise answer. Fingers crossed though.
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      01-17-2022, 04:34 PM   #3
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Quote:
Originally Posted by jLona240 View Post
Wheel & Tire fitment question for a M240 xDrive.

I'm looking at 18x8.5 wheels and 245/35 tires, squared. Pilot 4S

What offset do I need without rubbing on stock suspension? ET35 or ET45?
Quote:
Originally Posted by Kernel Kurtz View Post
Excellent question. I want to do the same and after many hours of searching these forums I have yet to come up with a concise answer. Fingers crossed though.
If you haven't already seen it, there's some info here: https://support.apexraceparts.com/hc...-Fitment-Guide.
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      01-17-2022, 11:09 PM   #4
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Thanks, I have seen that. That only tells me that Apex does not make any wheels in a size that will work without other mods. So ET35 and ET45 are definitely out, but lots of other manufacturers make wheels in other offsets, so I'd be happy to hear about some that do work.
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      01-18-2022, 11:30 AM   #5
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I'm running Niche wheels, 19x8.5 et35's (235's square) on stock height with no rubbing at all. ET 35 is going to be closest to flush/poke I would go, if I did it over again I'd look at et38 or et40 wheels.
Running 245s in front you will probably need a few degrees of camber but I can't speak from experience since I've only tried 235's.
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      01-18-2022, 12:22 PM   #6
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Quote:
Originally Posted by Devils41 View Post
I'm running Niche wheels, 19x8.5 et35's (235's square) on stock height with no rubbing at all. ET 35 is going to be closest to flush/poke I would go, if I did it over again I'd look at et38 or et40 wheels.
Running 245s in front you will probably need a few degrees of camber but I can't speak from experience since I've only tried 235's.
So ET38 18x8.5s with 235 square should work on stock suspension and geometry....How's your rear traction with only 235 out back?
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      01-18-2022, 03:32 PM   #7
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I went with 245's square.

Ended up going with 18 X 8 et 40 Fast FC04 wheels with MPS4S 245/35/18.

Not sure what the results would be with another .5 width on the wheels, but have not rubbed, took it to AutoX as well.

https://www.2addicts.com/forums/show...5&postcount=14
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      01-18-2022, 03:36 PM   #8
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Quote:
Originally Posted by Cos270 View Post
So ET38 18x8.5s with 235 square should work on stock suspension and geometry....How's your rear traction with only 235 out back?
I did some more digging and found an interesting thread.

https://www.2addicts.com/forums/show....php?t=1718540

He's running 18x8.5 et38 apex arc8 with 245/35 mp4ss with dinan lowering springs w/xdrive.

This is pretty much the same set up I want to do but coilovers instead of dinan springs.
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      01-18-2022, 04:23 PM   #9
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Here are some more;

https://www.2addicts.com/forums/show....php?t=1370118

https://www.2addicts.com/forums/show....php?t=1602402

These ones make me think 18x8.0 ET40 should work best, even if they are a bit narrow for 245s.

https://www.2addicts.com/forums/show....php?t=1602402

https://www.2addicts.com/forums/show....php?t=1804723

What I would really like to hear is what actually works for other people running 245/35 square on a completely stock car (and on xDrive as well in my case), not "this works with my lowered springs/camber plates/rolled fenders" - that is nice but of little use to the majority of owners.

There should be a sticky thread here for wheel & tire fitments that actually work on a stock car. I expect it would be an exceptionally short thread, but incredibly useful nonetheless.
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      01-19-2022, 06:47 AM   #10
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Quote:
Originally Posted by Kernel Kurtz View Post
Here are some more;

https://www.2addicts.com/forums/show....php?t=1370118

https://www.2addicts.com/forums/show....php?t=1602402

These ones make me think 18x8.0 ET40 should work best, even if they are a bit narrow for 245s.

https://www.2addicts.com/forums/show....php?t=1602402

https://www.2addicts.com/forums/show....php?t=1804723

What I would really like to hear is what actually works for other people running 245/35 square on a completely stock car (and on xDrive as well in my case), not "this works with my lowered springs/camber plates/rolled fenders" - that is nice but of little use to the majority of owners.

There should be a sticky thread here for wheel & tire fitments that actually work on a stock car. I expect it would be an exceptionally short thread, but incredibly useful nonetheless.
Here here!

I've spent countless hours trolling the forums to try and find a square setup that works for more than just one person. Seems like everyone has something unique that makes it work for them, or someone running all stock suspension says a setup works for them, but no one else. So frustrating. At this point I am willing to shell out some decent dough to get a custom set of wheels if it means I can run a square setup on a stock car. Just tell me the dang specs that are GUARANTEED to work!
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      01-19-2022, 07:54 AM   #11
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Quote:
Originally Posted by Cos270 View Post
So ET38 18x8.5s with 235 square should work on stock suspension and geometry....How's your rear traction with only 235 out back?
I've found this car to be a PITA when it comes to finding a fitment. Yes stock suspension you should be fine on those specs, 235's aren't great in the back (I live in a very dry climate) but I did the square setup for DD and longevity not so much performance. I can fit 245s still in the back if needed, its the fronts that most people have issues with.
That said, similar to what you are saying I spent hours doing research, talking to wheel shops and talking to other owners.
tires can matter I was running the exact same setup as another 2er, I'm on Goodyears, they are on Michelins and they rubbed same spec.

I'm about to go with coilovers and camberplates so I can have a few degrees of camber to play with when I go back to a staggered setup.
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      01-19-2022, 08:53 AM   #12
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Quote:
Originally Posted by Devils41 View Post
I've found this car to be a PITA when it comes to finding a fitment. Yes stock suspension you should be fine on those specs, 235's aren't great in the back (I live in a very dry climate) but I did the square setup for DD and longevity not so much performance. I can fit 245s still in the back if needed, its the fronts that most people have issues with.
That said, similar to what you are saying I spent hours doing research, talking to wheel shops and talking to other owners.
tires can matter I was running the exact same setup as another 2er, I'm on Goodyears, they are on Michelins and they rubbed same spec.

I'm about to go with coilovers and camberplates so I can have a few degrees of camber to play with when I go back to a staggered setup.
And that's what I'm worried about (regarding the tire brand). I'll even settle for running spacers up front! I just want to be able to maintain a decent level of grip and rotate my wheels. I don't ever see myself going past stage 2, and maybe I'll do some light suspension mods in the future (camber plates, tie rods, LCAs and end links) but the car is my daily, and will never be an aggressive track car.
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      01-19-2022, 01:28 PM   #13
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The issue is the front axle and trying to find the right offset to clear when running an 18X8.5 with a 245/35R18 tire. It's a stroke of luck if you can make it work without a spacer or trimming/rolling fender parts.

I'm running 18X8 et43 with 245/35R18 MPS4S tires. I ran the setup with stock springs in the front and Dinan springs in the back with a 5mm lift spacer for about 3 years. I then put the Dinan springs on the front a few months ago. There aren't any clearance issues with either setup.

The 245s in the front make a massive difference in front end grip and reduce understeer and tire wear.

I have no traction issues out back either with the 245s and the MP LSD with the exception of 1st which is a gear I rarely wind out. The car is making around 380whp/390wtq.

https://www.2addicts.com/forums/show....php?t=1370118 (I don't have any pics with Dinan springs in the front yet)
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      01-20-2022, 11:06 AM   #14
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Quote:
Originally Posted by Kernel Kurtz View Post
Here are some more;

https://www.2addicts.com/forums/show....php?t=1370118

https://www.2addicts.com/forums/show....php?t=1602402

These ones make me think 18x8.0 ET40 should work best, even if they are a bit narrow for 245s.

https://www.2addicts.com/forums/show....php?t=1602402

https://www.2addicts.com/forums/show....php?t=1804723

What I would really like to hear is what actually works for other people running 245/35 square on a completely stock car (and on xDrive as well in my case), not "this works with my lowered springs/camber plates/rolled fenders" - that is nice but of little use to the majority of owners.

There should be a sticky thread here for wheel & tire fitments that actually work on a stock car. I expect it would be an exceptionally short thread, but incredibly useful nonetheless.
Hi, I'm the guy running 18X8 et 40 245/35/18. I have xDrive and stock suspension, no spacers.

No rubs.
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      01-20-2022, 01:34 PM   #15
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Quote:
Originally Posted by Kernel Kurtz View Post
Here are some more;

https://www.2addicts.com/forums/show....php?t=1370118

https://www.2addicts.com/forums/show....php?t=1602402

These ones make me think 18x8.0 ET40 should work best, even if they are a bit narrow for 245s.

https://www.2addicts.com/forums/show....php?t=1602402

https://www.2addicts.com/forums/show....php?t=1804723

What I would really like to hear is what actually works for other people running 245/35 square on a completely stock car (and on xDrive as well in my case), not "this works with my lowered springs/camber plates/rolled fenders" - that is nice but of little use to the majority of owners.

There should be a sticky thread here for wheel & tire fitments that actually work on a stock car. I expect it would be an exceptionally short thread, but incredibly useful nonetheless.
So it seems like 18x8.5 ET45 with a 5mm spacer should work fine.
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      01-20-2022, 02:52 PM   #16
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Quote:
Originally Posted by tubingchamp View Post
Hi, I'm the guy running 18X8 et 40 245/35/18. I have xDrive and stock suspension, no spacers.

No rubs.
Thank you for that. I've had some tabs open for that wheel size thinking about pulling the trigger. Want to do so soon so I am ready when spring comes.

I'm pretty comfortable it should work, but confirmation from an actual user is appreciated.
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      01-20-2022, 04:20 PM   #17
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Quote:
Originally Posted by jLona240 View Post
So it seems like 18x8.5 ET45 with a 5mm spacer should work fine.
Maybe, maybe not. To get it to fit assumes a particular brand of tire and enough camber. It's that extra 1/2" of wheel that can cause the clearance issues in the front.
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      01-21-2022, 06:08 AM   #18
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Quote:
Originally Posted by Kernel Kurtz View Post
Thank you for that. I've had some tabs open for that wheel size thinking about pulling the trigger. Want to do so soon so I am ready when spring comes.

I'm pretty comfortable it should work, but confirmation from an actual user is appreciated.
What rims are you looking at, out of curiosity?
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      01-21-2022, 04:40 PM   #19
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Quote:
Originally Posted by Cos270 View Post
What rims are you looking at, out of curiosity?
I just went ahead and ordered a set of these.

https://www.partsengine.ca/M19018802...heels-370.aspx
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      01-24-2022, 06:37 PM   #20
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It seems a logical setup would be 4 oem rears with a 12mm spacer?
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      01-25-2022, 12:30 PM   #21
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Quote:
Originally Posted by thielepr View Post
It seems a logical setup would be 4 oem rears with a 12mm spacer?
I suppose that would work. Starting with such a high offset would let you dial in exactly what you need with spacers, but I assume you would have to use hub-centric spacers and long lug bolts.
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      01-25-2022, 12:35 PM   #22
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Quote:
Originally Posted by jLona240 View Post
So it seems like 18x8.5 ET45 with a 5mm spacer should work fine.
Perhaps, but keep in mind a 245 section tire mounted on an 8.5" wheel is wider (overall, as a unit), than a 245 mounted on an 8" wheel. This is going to reduce your margin of error equivalently, and a few mm makes a big difference here.
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