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      08-23-2010, 02:05 PM   #1
jeremydgreat
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275's in back. The carnage!

EDIT: To be clear, there's nothing about Apex-8 wheels or 275's that necessarily causes this. This post is about SETUP. I know enough people run these wheels with these tires that have never experienced anything like this. After reading many of your comments below, I'm convinced it's a matter of getting my ride height higher in the rear, and MAYBE a fender roll and spacer to give the tire some breathing room. If you're considering Apex wheels or wondering if 275's can fit, READ THE THREAD FIRST. I'll leave this info up here for people researching the topic. In short, don't slam the back end uf you're going to run that large of a tire.

Went to Leguna Seca last saturday and ran with my new Apex-8 wheels and 275 Dunlop Star Specs in the rear. I read that a few of you were doing those, so I took the plunge.

It looks like I'm in need of some spacers and a fender roll.





Anyone have any similar experiences with this?
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Last edited by jeremydgreat; 08-25-2010 at 04:38 PM.
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      08-23-2010, 02:33 PM   #2
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wtf! how low was your suspension? mine is extra slammed in the rear and although I'm running 265's, I could easily bump to 275 and still have room. Are those KW's?
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      08-23-2010, 02:38 PM   #3
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people that run the 275 mostly use Nittos cause they run a little bit narrower than your normal 275... But if you want to keep those tires, you will need a roll for sure...
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      08-23-2010, 02:56 PM   #4
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it looks like it is rubbing at the rear. A fender roll will not help.

How much negative camber are you running?
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      08-23-2010, 03:25 PM   #5
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Quote:
Originally Posted by nordique14 View Post
it looks like it is rubbing at the rear. A fender roll will not help.

How much negative camber are you running?
Full camber plates in the front. Nothing in the back. Hell I'm not even sure how you get negative camber in the back.

A fender roll would allow me to put spacers in the back though, right? So the wheels would mount further out to avoid rubbing on the inside. Right?
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      08-23-2010, 03:29 PM   #6
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Quote:
Originally Posted by randomquickness View Post
wtf! how low was your suspension? mine is extra slammed in the rear and although I'm running 265's, I could easily bump to 275 and still have room. Are those KW's?
Yeah, KWv2's I guess raising them up a couple inches would do the trick eh?
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      08-23-2010, 03:47 PM   #7
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I have the v1's with the adjustable spring perches removed and no issues. Yes the negative camber and fender roll would allow you to run a small spacer but I think the most you can dial in with the factory set up is just under -2 degrees.
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      08-23-2010, 04:07 PM   #8
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Jeremy,

Thanks for the phone call regarding the issue. As mentioned, numerous people are running the exact same rear 275/35/18 Star spec combo as you on our wheel with no issues. Nitto NT-01's are even being run and those are significantly wider.

The simple problem is your ride height is most likely way too low in the rear compared to others who are running this same setup. The 275/35 is much taller then the 245/35 the car comes with, so to run a tall tire and to be lowered a lot, is very probable cause for excessive rubbing. Once you get a photo of your ride height posted up, we'll be able to see what's going on. You mentioned the tire is tucked up into your fender, and I can't think I've seen anyone else lowered so low that they are tucking their 275's.

We'll also want to know if you're having any issues on the other side of the car. As that can help us isolate the problem.
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      08-23-2010, 04:41 PM   #9
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Quote:
Originally Posted by jeremydgreat View Post
Full camber plates in the front. Nothing in the back. Hell I'm not even sure how you get negative camber in the back.

A fender roll would allow me to put spacers in the back though, right? So the wheels would mount further out to avoid rubbing on the inside. Right?
When you lower the car, you increase the negative camber in the rear. That pushes the tires in at the top toward the rear of the car. Since you have "slammed" the car you are likely running way to much camber back there. Dialing out some negative camber will push the top of the tire closer to the fender and away from the back (which is what you want).

So check your alignment specs in the rear. Get the camber to about -1.5. The rear camber is adjustable but only to a point. If you are slammed all the way down then you may not be able to get to -1.5, but get as close as you can. Note that raising the car will also dial out some negative camber.

Of course if you dial out negative camber you will need to make sure you do not start rubbing on the fender instead. Since other people have been fitting the same tire on the same wheel I am sure it can be accomplished. It may take some trial and error to find the the correct ride height and camber though.

Good luck and let us know how it goes.
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      08-24-2010, 05:49 AM   #10
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Quote:
Originally Posted by randomquickness View Post
I have the v1's with the adjustable spring perches removed and no issues. Yes the negative camber and fender roll would allow you to run a small spacer but I think the most you can dial in with the factory set up is just under -2 degrees.
how do you like your V1's compared to stock?
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      08-24-2010, 09:23 AM   #11
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they are perfect for a daily driver but as soon as I took it on the track I wished I had paid a little more for the 2's or 3's.
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      08-24-2010, 03:40 PM   #12
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Quote:
Originally Posted by randomquickness View Post
they are perfect for a daily driver but as soon as I took it on the track I wished I had paid a little more for the 2's or 3's.
I have a convertible and don't ever track my car, so it's probably the set up for me. thanks for the info
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      08-25-2010, 08:51 AM   #13
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Agreed with the above. Looking at your DIY roof rack thread, the photos show your rear end is really dumped relative to the front. Raise the rear coilovers up a bit and it should take care of the issue. That's some serious carnage, though!
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      08-25-2010, 09:43 AM   #14
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do you only have a problem at the track?

a spacer should help and you will prob need to roll you fenders as well, also whats the aspec ratio of the tire, if its a 275/35, its too tall of a tire, you need a 275/30
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      08-25-2010, 10:33 AM   #15
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Jeremy, I was looking at your pic of the roof rack setup. The very first thing I noticed was that the pictures show your car slammed in the rear more than any other 1er I've ever seen.


I know you have some weight in there, but wow.. that's slammed. I assume that pic was on the way to your track day where that occurred. That could be a major contributing factor.
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      08-25-2010, 10:55 AM   #16
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Quote:
Originally Posted by larryn View Post
Jeremy, I was looking at your pic of the roof rack setup. The very first thing I noticed was that the pictures show your car slammed in the rear more than any other 1er I've ever seen.


I know you have some weight in there, but wow.. that's slammed. I assume that pic was on the way to your track day where that occurred. That could be a major contributing factor.
Well, it's really exaggerated in that picture because I have SO much weight in/on the car. In the trunk there's a 3.5ton jack, tools, jackstands, an EZ-up, luggage, etc. And on the top, well you can see.

On the track, the only weight inside was me and a passenger. Still, I think all of you are right- the rear suspension needs to be adjusted to it sits higher.
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      08-25-2010, 11:59 AM   #17
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I would say a spacer and a fender roll will do the trick. A more negative camber will only worsen the problem. You need to pull the tire away from the inside.
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      08-25-2010, 01:12 PM   #18
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Quote:
Originally Posted by Boxtyp3 View Post
I would say a spacer and a fender roll will do the trick. A more negative camber will only worsen the problem. You need to pull the tire away from the inside.

Maybe so, but there are a handful of dedicated racecars with those same wheels, and even larger tires (with no spacers). I believe if Jeremy adjusts the height in the rear by an inch or so, he'll have no more issues. Keep us posted, Jeremy!

I'll be at Watkins Glen International in a few weeks and have the exact same tire and wheel combo, but my car is higher. I'll report back. Not expecting any issues, as I autocross, and there are much more abrupt body articulations during AX, and I've had no issues.
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      08-25-2010, 02:09 PM   #19
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Agreed! But if the OP want to keep the height for whatever reason, then I'll stay with my recommendation.
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      08-25-2010, 03:25 PM   #20
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Quote:
Originally Posted by escobar929 View Post
do you only have a problem at the track?

a spacer should help and you will prob need to roll you fenders as well, also whats the aspec ratio of the tire, if its a 275/35, its too tall of a tire, you need a 275/30
The tire is a 275/35, and it's height is just fine. That size is just as tall as a 235/40/18 which is commonly used. 275/30/18 doesn't even exist.

After seeing a picture of the ride height, it's definitely set too low. Be sure to replace that damaged filler tube that you patched up. You don't want that to turn into a bigger problem later.

Check out pictures of Larry's, Andy's, and Gotcone's cars with the same setup, and you'll see they are setup much higher.
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      08-25-2010, 04:36 PM   #21
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That's the answer. The ride height just needs to go up a lot higher. I might to a small spacer and a light fender roll to give it more breathing room.

See my edit in the original post.
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      08-25-2010, 04:43 PM   #22
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There aren't too many tracks where you will see full compression of the suspension, Laguna Seca is one of them when coming down from the Cork Screw. I am certain you heard the rub as you exited the Cork Screw, am I right?

Look at our project 335i at full compression, you can't even see the top of the rear tires.
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Last edited by HP Autosport; 08-25-2010 at 04:53 PM.
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