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      06-13-2017, 10:00 AM   #1
tsk94
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18x9.5 ET42 Square - Could it work?

I'm trying to determine if a square setup of 18x9.5 ET42 square setup, with 255's on all 4 corners could work. Got a set of these wheels from an E46 that has since been sold and hope I can make them work on a E82 rather then selling them off.

From the searching I've done I think the rears will fit pretty easily. My issue is if the fronts could be made to work.

Tires would be 255 RE11's. Stock sport suspension, with currently ~ -2 front camber. With the appropriate spacers and fender roll could I get this to work up front?
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      06-13-2017, 10:09 AM   #2
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Quote:
Originally Posted by tsk94 View Post
I'm trying to determine if a square setup of 18x9.5 ET42 square setup, with 255's on all 4 corners could work. Got a set of these wheels from an E46 that has since been sold and hope I can make them work on a E82 rather then selling them off.

From the searching I've done I think the rears will fit pretty easily. My issue is if the fronts could be made to work.

Tires would be 255 RE11's. Stock sport suspension, with currently ~ -2 front camber. With the appropriate spacers and fender roll could I get this to work up front?
Up front, you'll need at least a 12mm spacer, -2* camber or more, and a fender roll.

Those wheels won't work at all in the rear without a lot of work. You'd have to pull your fenders a good 15mm, run really higher camber, or run some stupidly stretched tires like. You need ET58-ET62 in the rear to fit a 9.5" without doing modifications to the fenders and needing to run excessive camber or poorly fitting tires.

so, it can be done, it's just not ideal. Also, there is no reason to run 9.5" wheels if all you plan on is 255's. Get a proper set of 17x9's. Much better suited to that tire and you'll be able to get tires that better match stock aspect ratio. 255/40/17 is goign to perform better on a 9" wheel, require less work, and be massively cheaper to buy since it's a common tire size.

18x9.5's will limit you to running 30-35 series tires. It's is a huge jump in price and you'll still be increasing sidewall height quiet a bit from stock aspect ratio. The price difference of the tires alone can buy you a cheap set of 17x9 wheels to run 255's on...

Last edited by bbnks2; 06-13-2017 at 10:18 AM..
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      06-13-2017, 10:29 AM   #3
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Interesting. 255's on an 8.5in wheel ET52 fit easily in the back with no spacers or mods. I was thinking that a 1inch wider wheel with an offset pushing it outward (which has lots of room on an ET52 8.5 wheel) would work easily. On the 8.5in ET52's with 255's in the rear you can run a 10-15mm spacer no problem (I've done so).

Yes, I realize 255's are not the 'ideal' size for 9.5 inch rim. They would be slightly stretched, but if anything that would help them fit, especially up front.

I've got both the tires and wheels sitting around, thought maybe, just maybe, I could make them work.
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      06-13-2017, 12:14 PM   #4
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From all my researching and comparing to what I've run before, I see no issues with the rears fitting at all. Only question is the fronts.

Here is a comparison between what I know fits on the rear perfectly fine and can accommodate at least a 10mm spacer, and what I want to run.
https://ibb.co/dB8qa5

Last edited by tsk94; 06-13-2017 at 01:30 PM..
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      06-13-2017, 03:14 PM   #5
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Quote:
Originally Posted by tsk94 View Post
Interesting. 255's on an 8.5in wheel ET52 fit easily in the back with no spacers or mods. I was thinking that a 1inch wider wheel with an offset pushing it outward (which has lots of room on an ET52 8.5 wheel) would work easily. On the 8.5in ET52's with 255's in the rear you can run a 10-15mm spacer no problem (I've done so).

Yes, I realize 255's are not the 'ideal' size for 9.5 inch rim. They would be slightly stretched, but if anything that would help them fit, especially up front.

I've got both the tires and wheels sitting around, thought maybe, just maybe, I could make them work.
All the wheel clearance on a 135 is inboard and a higher offset will tuck the wheel in more to take advantage of that space... Lower offsets push you out into the fenders...

A 9" wheel needs at least ET45 or higher to clear the rear fenders with a roll. A 9.5" wheel would then need at least ET52 or higher... ET58 is the more ideal fitment that won't require rolling the rear fender (no work required)...

ET42 is poking 10mm more than ET52 and 16mm more than the no work fitment... No chance it's going to work
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      06-13-2017, 03:18 PM   #6
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Quote:
Originally Posted by tsk94 View Post
From all my researching and comparing to what I've run before, I see no issues with the rears fitting at all. Only question is the fronts.

Here is a comparison between what I know fits on the rear perfectly fine and can accommodate at least a 10mm spacer, and what I want to run.
https://ibb.co/dB8qa5
Let us all know how 18x9.5 ET42 works out for you... You'll be poking out past the fender 10mm. You need At least ET52-ET55.

The fender clearance is the issue, not the strut. You want a higher offset not a lower one (unless you want to do a drastic fender pull). Go outside and see for yourself how there is definitely not 22mm of clearance right now between your 8.5" rear wheels and your fenders... that's almost a full inch.

Last edited by bbnks2; 06-13-2017 at 03:26 PM..
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      06-13-2017, 03:19 PM   #7
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I'll try it tonight and let you know.
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      06-13-2017, 03:26 PM   #8
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Quote:
Originally Posted by bbnks2 View Post
All the wheel clearance on a 135 is inboard and a higher offset will tuck the wheel in more to take advantage of that space... Lower offsets push you out into the fenders...
Yes I realize that. My point was a 18x8.5 ET52 with 255's has PLENTY of clearance, from both the strut and the fender. I've run 8.5's ET52 with 12mm spacers in the rear and it's no problem.

That's why I asked why a lower offset, which pushes the wheel outward to the fender like you said, would be an issue. You'd think the 9.5 ET42 would fit similar to the 8.5 ET52 with a 12mm spacer. That's why I posted that image to try and give a visual representation. Look at that picture and imagine the 8.5in wheel being pushed out 12mm, due to spacer, and the fitment isn't far off of the 9.5's I want to run, no? Yes it will poke out more then the 8.5s with the spacer, but not much (10mm), which I don't see being an issue. The 8.5's with no spacer have at least an inch they can be pushed out with the 255 tires I want to run.
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      06-13-2017, 03:46 PM   #9
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Quote:
Originally Posted by tsk94 View Post
Yes I realize that. My point was a 18x8.5 ET52 with 255's has PLENTY of clearance, from both the strut and the fender. I've run 8.5's ET52 with 12mm spacers in the rear and it's no problem.

That's why I asked why a lower offset, which pushes the wheel outward to the fender like you said, would be an issue. You'd think the 9.5 ET42 would fit similar to the 8.5 ET52 with a 12mm spacer. That's why I posted that image to try and give a visual representation. Look at that picture and imagine the 8.5in wheel being pushed out 12mm, due to spacer, and the fitment isn't far off of the 9.5's I want to run, no? Yes it will poke out more then the 8.5s with the spacer, but not much (10mm), which I don't see being an issue. The 8.5's with no spacer have at least an inch they can be pushed out with the 255 tires I want to run.
I just gave you the math... If Et42 git then Apex wouldn't of made 1 series specific fitments of ET58-ET62. There is no way you won't rub. I have 17x9 ET45 and I had to roll my rear fenders (-1.7* camber). I STILL rub. An ET45 9.5" wheel will poke another 7mm beyond that and ET42 wheel would poke another 3mm for 10mm total. 255 is slightly stretched though on a 9.5" wheel and -2.5*+ camber would help. Again, not ideal at all though.
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      06-13-2017, 03:49 PM   #10
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Quote:
Originally Posted by bbnks2 View Post
I just gave you the math... If Et42 git then Apex wouldn't of made 1 series specific fitments of ET58-ET62. There is no way you won't rub. I have 17x9 ET45 and I had to roll my rear fenders (-1.7* camber). I STILL rub. An ET45 9.5" wheel will poke another 7mm beyond that and ET42 wheel would poke another 3mm for 10mm total. 255 is slightly stretched though on a 9.5" wheel and -2.5*+ camber would help. Again, not ideal at all though.
I'll check when I get home and get back to you, maybe the fender roll I have on my car is much more aggressive, I don't know. On the 8.5in with no spacer if I can recall it was 30mm+ of clearance to fender available. That was with around -2 rear camber.
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      06-13-2017, 04:36 PM   #11
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You'll need to do a lot of work to make those fronts work. I'm 18x9 et38 up front and I rub on hard turns and I only have hankook 215/40/18 up front. Rear I'm running 18x10 et40 on hankook 245/35/18 without issue rub slightly on big dips.
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      06-13-2017, 04:46 PM   #12
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Quote:
Originally Posted by Zombie1 View Post
You'll need to do a lot of work to make those fronts work. I'm 18x9 et38 up front and I rub on hard turns and I only have hankook 215/40/18 up front. Rear I'm running 18x10 et40 on hankook 245/35/18 without issue rub slightly on big dips.
Yeah I'm concerned with the fronts. Thanks for your input. Are you running stock ride height? And how much front camber?

I'll do some measuring and fitting tonight and report back.
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      06-13-2017, 05:16 PM   #13
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I'm lowered on TC klines, running -1.7 up front
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      06-14-2017, 08:33 AM   #14
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Did some test fitting with the rim alone, no tire mounted on them though.

Rear could work with the roll I have which seems to be very aggressive and with the slight stretch of a 255 on a 9.5 and stock height. Hard to say for sure without a tire on the wheel to really test.

Front seems to be more of an issue, pokes out maybe 5mm as is.
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      06-14-2017, 12:06 PM   #15
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Quote:
Originally Posted by tsk94 View Post
Did some test fitting with the rim alone, no tire mounted on them though.

Rear could work with the roll I have which seems to be very aggressive and with the slight stretch of a 255 on a 9.5 and stock height. Hard to say for sure without a tire on the wheel to really test.

Front seems to be more of an issue, pokes out maybe 5mm as is.
What size spacers did you put up front?

12mm should do it. 15mm might be needed if you tried to run wider tires in the future. You must have adjustable camber plates as well, right? try with -2.5* camber. You'll probably still eat away at your bumper a bit no matter what you do because of body roll. Same deal with the rear. You might get the rear to work decent for street driving, but any kind of hard cornering is going to make them rub back there too.
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      06-14-2017, 12:19 PM   #16
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Quote:
Originally Posted by bbnks2 View Post
What size spacers did you put up front?

12mm should do it. 15mm might be needed if you tried to run wider tires in the future. You must have adjustable camber plates as well, right? try with -2.5* camber. You'll probably still eat away at your bumper a bit no matter what you do because of body roll. Same deal with the rear. You might get the rear to work decent for street driving, but any kind of hard cornering is going to make them rub back there too.
Up front was a 15mm spacer.

Probably would work with more camber. But if it's going to rub pretty badly during hard cornering I don't think I'd want to bother..
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      06-14-2017, 12:39 PM   #17
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Quote:
Originally Posted by tsk94 View Post
Up front was a 15mm spacer.

Probably would work with more camber. But if it's going to rub pretty badly during hard cornering I don't think I'd want to bother..
I'll get you a picture of my bumper for you to show you what I mean... Crawl under the car and see how much clearance you have to the strut...

I was going to try 17x9.5 up front. I was going to shoot for ET30. You are poking 3mm more than that (ET27) so if my math checks out you should have 3-5mm of clearance extra clearance on the strut side. A 12mm spacer (ET30) might get the job done for you. Get the fender pulled a bit right where it meets the bumper (you can probably gently pry it by hand even) and that should pull the bumper out enough to keep it from getting chewed up.

255 on a 9.5 is a bit stretched too so that should help with rubbing on the bumper.
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      06-14-2017, 09:45 PM   #18
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Hard to tell but you can see how the corner of the bumper is worn away a bit... this is 17x9 et25 (20mm spacers). A 9.5" wheel would poke another 2mm past this at et30 which is what you'd end up with using 12mm spacers.
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      07-03-2017, 04:50 PM   #19
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I suspect that rear will be tight but can be made to work depending on your rear camber. I run a 255 DWS on a 9.5" +45 rear as my "street" tire and it clears easily with my -2.2 camber and rolled fender lips.

On the other hand, I think your life will be hell to fit that on the front. I run a 255 on a 9" with a perfect offset of 35 and it BARELY fits, and I mean BARELY with -2.9 degrees camber (no ///M arms - you will need at least -3.6 degrees if you have the arms).

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      07-05-2017, 10:42 AM   #20
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After some test fitting I've determined that they unfortunately will not work.

Rears are doable but the front is where the problem is. With a 10mm spacer I had ~4mm of strut clearance but the rim would still stick out 15-20mm past the fender, that's with -2* of camber. Even with a 8mm spacer, giving 2mm strut clearance and ~3* camber it still wouldn't work.

Thanks for all the help everyone!
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      07-06-2017, 10:03 PM   #21
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Quote:
Originally Posted by Zombie1 View Post
You'll need to do a lot of work to make those fronts work. I'm 18x9 et38 up front and I rub on hard turns and I only have hankook 215/40/18 up front. Rear I'm running 18x10 et40 on hankook 245/35/18 without issue rub slightly on big dips.
Well I'm boned as I'm running 18x9 ET37 (45+8mm spacer) up front and 245/35/18. haaa let's hope 2.5 degrees of camber will solve it.
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