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Go Back   E46Fanatics > Tuning & Tech > The Tire Rack's Tire & Wheel Forum

The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 08-23-2016, 09:28 AM   #1
Tyler H
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Apex ARC-8 18x9 et 30 non-M fitment

"Introducing our newest ARC-8 fitment: the 18x9.0 ET30. Now you can run a wheel width and offset that retains all of the concavity of your favorite wheels without having to run camber plates, roll/flare fenders, or deal with any rubbing. These are perfect for E46 and E9X Non-M owners."

Has anyone successfully fit these to a non-M? I'm saying it's not happening after messing around for a couple of weeks.

Despite coilovers and adjustable lower control arms, cranking in more negative camber than I want, and fully rolling the rear fenders, these are still going to rub.

I'm running Michelin PSS 245 40s, so maybe you could go with a 245 35 and get .7" more suspension travel before they rub? I'm fouling above the fender lip and at the trailing edge of the fender, where the rear bumper cover meets.

Curious if anyone has fit these without extreme negative rear camber? I'm not going for stretch or stance.
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Old 08-24-2016, 05:48 PM   #2
lamsv
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I think the Michelin PSS runs a bit wide. A 245 actually measures closer to a 255. I remember seeing a picture of a 245 PSS next a 255 Continental and it was the same width. That explains why you are probably rubbing at the fender lip.

The other problem is a 245/40-18 is quite a bit taller than stock. A 245/35 would be closer to stock. With a tire that is 1/2" larger in diameter, that explains why are rubbing where the fender and rear bumper meet.

Basically, you are rubbing at (2) different spots for (2) different reasons, in my opinion.
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Old 08-25-2016, 11:35 AM   #3
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Does anyone have pics of them on e46
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Old 08-26-2016, 11:58 AM   #4
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Nice. Pics would be nice though.

Last edited by ben325I; 08-26-2016 at 11:59 AM.
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Old 08-29-2016, 05:42 PM   #5
bimmernate
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Quote:
Originally Posted by lamsv View Post
I think the Michelin PSS runs a bit wide. A 245 actually measures closer to a 255. I remember seeing a picture of a 245 PSS next a 255 Continental and it was the same width. That explains why you are probably rubbing at the fender lip.

The other problem is a 245/40-18 is quite a bit taller than stock. A 245/35 would be closer to stock. With a tire that is 1/2" larger in diameter, that explains why are rubbing where the fender and rear bumper meet.

Basically, you are rubbing at (2) different spots for (2) different reasons, in my opinion.
IMO michelin PSS runs narrow. 245/40/17s next to same size bridgestone S04. The s04 tires are on a 9" wheel, but still. The tread on the michelin has 0.5inches less width.




to the op, i do agree that running 35s would have helped.
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Old 09-02-2016, 09:18 AM   #6
Tyler H
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245 40 and 245 35 have the same section width, but the 245s are .9" taller. That means with a 245 35, I get ~1" more suspension travel before it rubs. Anyone know what the camber curve is on these cars?

I built a spreadsheet off Tire Rack's specs, and all of the best max performance tires have the same section width (widest point) in these sizes. The tread width varies by up to half an inch, but that's not the trouble spot.

Pics, as requested. The second pic was before I added a couple more degrees of negative camber and rolled the rear fenders. Thanks, guys!




Last edited by Tyler H; 09-02-2016 at 09:19 AM.
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Old 09-02-2016, 11:14 AM   #7
lamsv
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Those look great!

Are you still rubbing where the bumper and fender meet?

Also, you actually gain only .45" of clearance with the 245/35. Even though the overall height of the wheel is .9" less, you actually measure from the center of the wheel. Stack the wheels so the bolt holes line up, and you will see there is only .45" of height difference at the outer edges of the tire. That make sense?

Still, nearly 1/2" more clearance will make a difference.
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Old 09-02-2016, 12:13 PM   #8
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Very nice so those are 18x9 et30 with 245 40 ?
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Old 09-24-2016, 12:44 PM   #9
Tyler H
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Very nice so those are 18x9 et30 with 245 40 ?
Yes...they look great piled up in my garage because they don't fit.

I'm going to test fit a 35 series and if that doesn't work, cut my losses. This has been a boondoggle, especially after waiting 2mo for Apex to ship them. I'm going to take a loss on the wheels or tires or both. Major buyer's remorse.
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Old 09-24-2016, 01:39 PM   #10
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I will buy them for the right price if you want to sell them , are you on stock suspension on those pics
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Old 09-24-2016, 02:08 PM   #11
Tyler H
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I will buy them for the right price if you want to sell them , are you on stock suspension on those pics
Car is lowered on Ground Control coilovers, camber plates in the front, SPC adjustable rear lower control arms, Z4M FCAB bushings for fixed caster.

-2deg all around in the garage picture. The picture outside I had cranked the rears to maybe -4-5 degrees. Rear fenders are rolled and pulled slightly. Fronts were fine.

When I have some time, I'm going to have my two Contis swapped off the rear style 135s, just to see if a 35 series tire is enough to work. If not, they'll be available.

The rim guards on the PSS sidewalls are ultra beefy. Not helping.
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Old 10-08-2016, 09:40 AM   #12
Tyler H
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Update: replaced the PSS with Continental Extreme DW 245 35 18 and so far so good. Looks great and no discernable rubbing with spirited street driving. Next up: load the car down with passengers and cargo and try it.

It's close! So close that I can plane off some tire dressing in the back, lol.

Edit: should mention that this is with the rear camber set back to -2 degrees.

Last edited by Tyler H; 10-08-2016 at 09:46 AM.
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Old 10-11-2016, 05:46 PM   #13
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Nice! Glad you (hopefully) got rid of the rubbing.
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Old 12-04-2016, 10:36 PM   #14
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So those wheels on the silver zhp have 245 40 or 245 35 . I'm trying to find the best option for my car I'm going with a h&r cupkit
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Old 12-04-2016, 10:42 PM   #15
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So those wheels on the silver zhp have 245 40 or 245 35 . I'm trying to find the best option for my car I'm going with a h&r cupkit
I'd reconsider the h&r cupkit. much better stuff out there for similar $.
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Old 03-07-2017, 02:20 AM   #16
dinternetman
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I am wondering about the square fitment of the new et30 offset for the Apex Arc 8 18x9.0 with 255/35/18 square Michelin PSS. My 330i ZHP is on koni fsd/eibach pro kit, stock camber, fenders not rolled (don't mind getting rolled if needed).

I want to be able to run this setup to get better neutral handling and also be able to rotate wheels/tires for longevity. Power wise, I have ESS TS2 installed, will the combination of the TS2 and front end grip cause too much oversteer?

Thanks so much if anyone can help answer these questions, I'm in the group buy and it should open very soon!
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Old 03-07-2017, 07:24 AM   #17
Tyler H
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Originally Posted by dinternetman View Post
I am wondering about the square fitment of the new et30 offset for the Apex Arc 8 18x9.0 with 255/35/18 square Michelin PSS. My 330i ZHP is on koni fsd/eibach pro kit, stock camber, fenders not rolled (don't mind getting rolled if needed).

I want to be able to run this setup to get better neutral handling and also be able to rotate wheels/tires for longevity. Power wise, I have ESS TS2 installed, will the combination of the TS2 and front end grip cause too much oversteer?

Thanks so much if anyone can help answer these questions, I'm in the group buy and it should open very soon!
255/35/18 aren't going to fit under the rear fenders. 245/35/18 will, but you're going to need all of the roll you can reasonably get.
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Old 03-07-2017, 06:08 PM   #18
Tyler H
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Originally Posted by Nvzhp View Post
So those wheels on the silver zhp have 245 40 or 245 35 . I'm trying to find the best option for my car I'm going with a h&r cupkit
Here is a picture of my car with the Conti 245 35 18s.




And some links to some more crappy pics of my car. Maybe I'll take a decent picture someday.

https://goo.gl/photos/TT3svWuVTKbaecLU8

https://goo.gl/photos/5MMmKmVixBjfywP99

https://goo.gl/photos/nGNUpyaDf7u4zEBy7

Last edited by Tyler H; 03-07-2017 at 06:12 PM.
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