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      09-12-2013, 05:56 PM   #23
Freon
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That's the same dimensions as an ARC-8 so I don't see why not.
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      09-13-2013, 04:41 PM   #24
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Quote:
Originally Posted by Freon View Post
That's the same dimensions as an ARC-8 so I don't see why not.
That's what I figured, but I'm seeing more posts saying they won't fit, than posts that say they will fit. I feel like it would at least require a fender roll.
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      09-13-2013, 04:58 PM   #25
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Just because you can do it doesnt mean you should. Wait until you hit a big bump and really screw something up down there. I have 235/40/18s on the front of my ARC8's and I even rub on big bumps. IMO running a 255 in the front is asking for trouble.
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      09-13-2013, 05:45 PM   #26
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Originally Posted by Spoolin Montego View Post
Just because you can do it doesnt mean you should. Wait until you hit a big bump and really screw something up down there. I have 235/40/18s on the front of my ARC8's and I even rub on big bumps. IMO running a 255 in the front is asking for trouble.
Yeah I figured 235 max up front would be best. You think I'd run into any problems with 235's?
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      09-13-2013, 07:58 PM   #27
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Originally Posted by Spoolin Montego View Post
Just because you can do it doesnt mean you should. Wait until you hit a big bump and really screw something up down there. I have 235/40/18s on the front of my ARC8's and I even rub on big bumps. IMO running a 255 in the front is asking for trouble.
All depends on camber. You run enough camber and you won't rub on anything ever with 255s. He's not the first to run 255s up front, but most people do it with about -2.5 camber up front and have no problems with rubbing ever.
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      09-13-2013, 09:15 PM   #28
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Originally Posted by Stohlen View Post
All depends on camber. You run enough camber and you won't rub on anything ever with 255s. He's not the first to run 255s up front, but most people do it with about -2.5 camber up front and have no problems with rubbing ever.
If you're going to run 255s up front, then why not run 9.5 inch wheels?

Last edited by Delta Goose; 09-14-2013 at 01:01 PM.
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      09-13-2013, 09:27 PM   #29
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If you're going to run 255s up front, then why not run 9.5 inch wheels?
You could if you so chose. I believe you'd need a custom wheel though. The Apex series of wheels is specifically designed to max out fitment in the front. However, I dont think when they designed the wheels they were thinking about people going to a 255 inch wheel. Not that you really need it, 255s fit fine on an 8.5 inch wheel. Really a 9 inch wheel would be the most ideal for 255s. I run 285s on my 9.5 inch wheel, i'd never put 255s on it, too much stretch for me.
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      09-13-2013, 09:29 PM   #30
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Quote:
Originally Posted by Stohlen View Post
You could if you so chose. I believe you'd need a custom wheel though. The Apex series of wheels is specifically designed to max out fitment in the front. However, I dont think when they designed the wheels they were thinking about people going to a 255 inch wheel. Not that you really need it, 255s fit fine on an 8.5 inch wheel. Really a 9 inch wheel would be the most ideal for 255s. I run 285s on my 9.5 inch wheel, i'd never put 255s on it, too much stretch for me.
255s or 265s are actually ideal on a 9.5 wheel.

Yes, they are "stretched", but it stiffens up the sidewall to increase response in the tire.

Think of performance stretched...not really stanced stretched.
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      09-13-2013, 09:31 PM   #31
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255s or 265s are actually ideal on a 9.5 wheel.

Yes, they are "stretched", but it stiffens up the sidewall to increase response in the tire.

Think of performance stretched...not really stanced stretched.
Probably varies a bit by brand too. Dunlop said 255 on a 9 inch wheel, but that means nothing for other tires
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      09-14-2013, 09:51 AM   #32
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A good method that's works more me is take the tires tread width and match it with the rim width. Always seems to match up Great. Example Michelin pss In 235/40/18 are 8.5 tread width. Works great on 8.5 wheel and so on. It's not perfect but this will always get you close to ideal fitment
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      09-14-2013, 06:33 PM   #33
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Quote:
Originally Posted by Delta Goose View Post
If you're going to run 255s up front, then why not run 9.5 inch wheels?
The same 255/35/18 tire will be wider when mounted on a 9.5" width wheel compared to a 8.5" width wheel. I don't think at +45 the 9.5" wheel would fit at all, even with no tire on it. I think it will touch the strut. Remember offset is measured from the midpoint of the wheel, regardless of width. Look at how close it is already... going to 9.5" with the same offset moves the inner rim a half inch towards the strut. There is maybe 1/8"-1/4" there with the 8.5" wheel.

Michelon's PSS 255/35/18 is rated for an 8.5 to 10 inch wide wheel. You can just look this up right on their website. Part number 07807
http://www.michelinman.com/tire-sele...t/tire-details

8.5" is on the narrow side of their recommendations, but gets quite a bit of tire under the front end of the car. Yes, sidewall stiffness is negatively affected by leaner to the narrow side on wheel width, but I don't feel a significant difference coming from 235/40/18 Dunlop Z1 on the same wheels. They're both lightyears from the runflats.
Quote:
Originally Posted by Spoolin Montego
Just because you can do it doesnt mean you should. Wait until you hit a big bump and really screw something up down there. I have 235/40/18s on the front of my ARC8's and I even rub on big bumps. IMO running a 255 in the front is asking for trouble.
I'm a big boy. If I wreck a fender I'll let everyone know, but I've driven it enough now to feel pretty comfortable.

Do you have any added camber?
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      09-14-2013, 08:27 PM   #34
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So is there a definitive answer whether or not I'd be okay with 235/35/18 PSS up front with 8.5" +45 wheels on stock suspension and stock camber?
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      09-14-2013, 08:40 PM   #35
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So is there a definitive answer whether or not I'd be okay with 235/35/18 PSS up front with 8.5" +45 wheels on stock suspension and stock camber?
Nothing is ever definite... but yes you'd probably be okay. Worst case you'd have to pull the camber pins and slide the struts over a touch.
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      09-16-2013, 10:05 AM   #36
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I had a 235/40/18 Dunlop Z1 on the front previously without even the camber pin removed, and I autocrossed it several times. I never had any issues. I don't think the PSS runs any wider than the Z1, if anything its the other way around. I wouldn't hesitate at all. Apex themselves say a 235/40/18 street tire is good to go in the front with a stock suspension.

235/35/18 is a short tire. It would work, but you'll add a lot of rake to the car if your rear is a lot wider but also a 35 series tire.

However, I still recommend removing the alignment pins as you'll eat your front tires. The car needs camber.
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      09-16-2013, 01:59 PM   #37
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I've tracked and autox my Car with a 235/40/18 pss up front with zero issues with apex ex7 et 45 8.5 wheel up front on stock suspension
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      09-17-2013, 12:45 AM   #38
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I have a 235/40/18 Accellera on the front of my ARC8s now, stock suspension. I had some slight rubbing on big bumps for the first 1000 miles but nothing now, these tires have a pretty square sidewall too.
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      10-17-2013, 03:35 AM   #39
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Hi guys. When your talking about original suspension, is that just the struts or with original control arms? I have original struts but i lowered with springs 60/40 and i have m3 bits in both front and rear.

I have bought Toyo R888 235/35-18 that I'm going to try having up the front and want to buy as wide as possible up rear. I have looking for 265/35-18 but really want to fit 285/30-18.

I have read 100 treads about tires fitment but cant se if any of you have the m3 control arms in the front or if you have original high and chassie.


Thanks!
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      10-17-2013, 07:29 AM   #40
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Hi guys. When your talking about original suspension, is that just the struts or with original control arms? I have original struts but i lowered with springs 60/40 and i have m3 bits in both front and rear.

I have bought Toyo R888 235/35-18 that I'm going to try having up the front and want to buy as wide as possible up rear. I have looking for 265/35-18 but really want to fit 285/30-18.

I have read 100 treads about tires fitment but cant se if any of you have the m3 control arms in the front or if you have original high and chassie.


Thanks!
When we're talking original suspension, we're talking about springs and struts. Both the OP and myself aren't lowered. I have M-sport stock suspension, not sure about him.

The drop you have is the only thing that could be an issue with Arc-8 style offsets in the rear. I've got plenty of space and dont rub at all in the rear with my 285-30-18s. Next change i'm gonna get 295s because i'm not afraid of spacers and a little fender work, but again i'm not dropped.

Control arms make no difference in the rear and basically no difference in the front. Not really a concern. I have a full M-3 setup and it didnt change anything for me.
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      10-18-2013, 11:33 AM   #41
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Originally Posted by Stohlen View Post
When we're talking original suspension, we're talking about springs and struts. Both the OP and myself aren't lowered. I have M-sport stock suspension, not sure about him.

The drop you have is the only thing that could be an issue with Arc-8 style offsets in the rear. I've got plenty of space and dont rub at all in the rear with my 285-30-18s. Next change i'm gonna get 295s because i'm not afraid of spacers and a little fender work, but again i'm not dropped.

Control arms make no difference in the rear and basically no difference in the front. Not really a concern. I have a full M-3 setup and it didnt change anything for me.
Thanks for answer! I will take a look on the ARC-8 wheels for next summer
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      10-31-2013, 01:09 PM   #42
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I'm gonna try to fit 295s. But only after I measure the crap outta everything prior to see if its feasible. Might have to use a spacer and pull the outside fender slightly with my forgestars.
How did it go to fit 295?
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      10-31-2013, 05:02 PM   #43
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How did it go to fit 295?
Haven't burned up the 285s yet. I'm not totally traction limited at the moment, so I haven't felt the need to try 295s yet.
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      11-01-2013, 08:45 AM   #44
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Originally Posted by Spoolin Montego View Post
Just because you can do it doesnt mean you should. Wait until you hit a big bump and really screw something up down there. I have 235/40/18s on the front of my ARC8's and I even rub on big bumps. IMO running a 255 in the front is asking for trouble.
you rubbing on 235 has nothing to do with the fact its a 235, but the fact you are running a 40 profile. a 235/40 is TALLER than a 255/35-18.
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