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dw1 dw1 is offline
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Question wide front tire rubbing fix - opinions?

I recently mounted 17's on my '87 3.2 (standard fender flares) using 7.5 inch wide fronts (23 offset) and 9 in wide rears (15 offset).

The current (very used) tyres are 225/45-17 front and 255/40-17 rear.

The rears don't have a problem, but to no great surprise the fronts rub. I sorta expected it because the car is currently at (or actually slightly below) Euro ride height.

So, what is this extremely knowledgeable group's opinion on fixing the rubbing by:
1. Taking the car back up to US ride height or closer to it
2. Going to a narrower front tyre
3. Rolling the fender lip.

This last option is one I really want to stay away from because I'm trying to keep the car so it can be easily returned to 100% stock for its eventual sale and I'm concerned that permanent non-stock modifications can significantly impact resale value.

Last edited by dw1; 07-09-2018 at 05:00 PM..
Old 07-09-2018, 08:37 AM
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Add camber
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Old 07-09-2018, 08:46 AM
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what do the fronts rub? inner fender? fender lip? control arm? headlight bucket?
and under what conditions? just rolling on flat road? bumps? turning? bumps while turning?
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Old 07-09-2018, 09:32 AM
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A little more info please.

What is the current height now?

I am a bit below euro with same size wheels and tires ( note not all tires are the same width, my Goodyear's were wider than my current Conti's )

I rolled mine fenders and added negative camber when I had the Goodyears, no issues with the Conti's.
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Old 07-09-2018, 10:26 AM
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Quote:
Originally Posted by dw1 View Post
I recently mounted 17's on my '87 3.2 (standard fender flares) using 7.5 inch wide fronts (23 offset) and 9 in wide rears (15 offset).

The current (very used) tires are 225/45-17 front and 255/40-17 rear.

The rears don't have a problem, but to no great surprise the fronts rub. I sorta expected it because the car is currently at (or actually slightly below) Euro ride height.

So, what is this extremely knowledgeable group's opinion on fixing the rubbing by:
1. Taking the car back up to US ride height or closer to it
2. Going to a narrower front tire
3. Rolling the fender lip.

This last option is one I really want to stay away from because I'm trying to keep the car so it can be easily returned to 100% stock for its eventual sale and I'm concerned that permanent non-stock modifications can significantly impact resale value.
7.5 ET23 +225/45 tire means that the front space is right near the max. of ~3.5"

options are add more negative camber, roll or shave the lip, raise the car a tad
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Old 07-09-2018, 11:18 AM
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dw1, since different model tires have slightly different widths, I'd recommend a) looking into which tires run narrower (e.g. the contis draco's currently running), and b) not address the rub until you have installed/mounted tires that you'll be running for a while (i.e. don't get your car dialed in with the current "very used" tires -- which may well end up being a different overall width from those that you get as replacements.

Also, wouldn't adding negative camber cause the inner edge of the front tires to wear out a lot faster than the outer edge?
Old 07-09-2018, 02:03 PM
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after wheels/tires upgrade, my front tires rub in the wheel well, on max turn. I ended up using narrower front tires.
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Old 07-09-2018, 02:27 PM
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Thanks for the inputs. I feel a bit gormless for not considering camber as an option.

And thanks Darrin & Draco for the input on different widths for the "same" numerical size. The "very used" tyres are Michelin pilot sports and being a big fan of Contis (I run them on my DD & on my stock Fuchs 16s) I see how the difference in width can be manifest.

My thinking now is to go to 205/50-17 on the front, after I do a few more measurements. But...

Last edited by dw1; 07-10-2018 at 03:44 AM..
Old 07-09-2018, 05:04 PM
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You could also use a 215/45 instead of the 205, which is a little bit shorter or less diameter, but only about 3/8 to half inch. And having a narrower tire than 225 might be better for that rim width as well.
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Old 07-09-2018, 08:20 PM
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205/50-17 is no shorter than a 225/45-17. markedly narrower, but no shorter.
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Old 07-10-2018, 04:09 AM
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If you change the front you should also change the rear

here's what a change from Michelin PS2 225/45 & 255/40 x17 to Conti EC/Sport 215/45 & 245/45 x17 would look like


all in all it's a good change
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Old 07-10-2018, 04:22 AM
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What Bill said. I have this size wheel/tire/offset combo and car exactly. A little roll or fender shave isn't noticeable to my eye and I can't believe it will affect the value at all and why would you be putting big ol tires on a car you don't want to look modded. Lots of camber helps definitely. I still get an occasional rub in the fender well at full steering lock but its only noticeable from the mark you can see with the wheel off. Minor trade off to get the look you want.
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Old 07-10-2018, 05:25 AM
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Between rolled fenders, and -2.8* camber, Ive got 245/45/17's on the same size wheel with no fender rub.
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Old 07-11-2018, 09:58 PM
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Quote:
Originally Posted by PatrickB View Post
Between rolled fenders, and -2.8* camber, Ive got 245/45/17's on the same size wheel with no fender rub.
but not on 7.5 ET23 wheels
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Old 07-12-2018, 05:20 AM
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That's an awesome spreadsheet, is it available to use? Trying to understand the front 16x8 offsets available for my car.

Sorry to hijack!
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Old 07-12-2018, 06:27 AM
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Quote:
Originally Posted by kyngfish View Post
That's an awesome spreadsheet, is it available to use? Trying to understand the front 16x8 offsets available for my car.

Sorry to hijack!
unfortunately the available Fuchs 8" wheel w/ the closest usable ET for an SC/Carrera is the the 951 8x16 ET23.3.

These have been used in front but it is a far from happy fit, the ET is just a tad too low for comfort. If you do try to use them try it w/ a 225/45 tire. 205's can be stretched on as well but that defeats the whole purpose of using an 8

max frontspace on an SC/Carrera is ~3.5" as the f/s gets closer to that from below more and more compromises need to be used, past that it gets exponentially worse. A typical 225/50 on an 8ET23.3 has a front space of ~ 3.51" so one of the compromises is to use a shorter tire like a 225/45 x16 alternately raise the car. In addition all the usual tricks of shaving the fenders and using more negative camber apply as well.
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Old 07-12-2018, 12:44 PM
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Quote:
Originally Posted by Bill Verburg View Post
but not on 7.5 ET23 wheels
Actually yes, Rota Fox 17x7.5, ET23.
And also on Fikse FM10, 17x8, et23
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Old 07-16-2018, 10:10 PM
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Quote:
Originally Posted by PatrickB View Post
Actually yes, Rota Fox 17x7.5, ET23.
And also on Fikse FM10, 17x8, et23
lets see,
7.5" ET23.3 wheel 245/45 x17 tire has a front space of ~3.9" and a backspace of ~5.75"

same tire on an 8 will be a bit wider and stick out a bit more

stock 7 Et23.3 w/ 205/55 x16 is already close and can cause issues on some cars w/ a f/s of ~3.2"

given the above your claim doesn't pass the credibility test unless it's at SUV ride height


I'd like to see pictures of your installation before I'd believe it.

here are pics of an 8ET25 w/ 225/45 x17 w/ a f/s of 3.47", 235/45 has also been used on this wheel but the ride height needed to be ~ .5" higher


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Old 07-17-2018, 04:03 AM
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I have seen 245/45 x17 on 8 fitted to an SC/Carrera but it was on a higher ET wheel and the shock covers had to be replaced w/ rubber covers or left bare.

here's some info on a 9 w/ 245/45
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Old 07-17-2018, 04:23 AM
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I just installed 215/45x17 ande 245/40x17 Conti Extreme Contact Sport tires onto Euromeister wheels (from our host). I believe they are 7s and 9s, or thereabouts. 1 degree negative camber in front. Very low ride height. The front tires rub. Entering the driveway incline with the wheels cocked. I need to roll or shave the fenders, and I will be asking for advice on that.
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Old 07-17-2018, 04:59 AM
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