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      01-10-2020, 03:34 PM   #111
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Quote:
Originally Posted by F87source View Post
275/35/18 will fit in the front with a set of apex wheels and their m2 specific offset (ET22, ET28) but you'll need some agressive negative camber.
I believe several companies, including Dinan + Forgeline have fit 275/30R19 up front. But that is much shorter than 275/35R19 up front.
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      01-10-2020, 03:35 PM   #112
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Originally Posted by DriverDaily View Post
I believe several companies, including Dinan + Forgeline have fit 275/30R19 up front. But that is much shorter than 275/35R19 up front.
Hmm very interesting!

I personally prefer a smaller wheel size so I can get more sidewall which makes for a stiffer sidewall tire which is better on track steering response.
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      01-10-2020, 04:54 PM   #113
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Quote:
Originally Posted by F87source View Post
Even if you speak to tire experts and suspension fitment experts they'll tell you for a wider shock body such as the key v3 club sports you may not be able to fit a particular tire size for example 275 in the front due to rub. So when selecting tires they often advise that the re71r's are extremely blocky due to the agressive side walls and not to pick that if you have kw's and pick a more streamlined tire such as the rs4. So there is some slight variations between tires that can cause rubbing.
Not saying what you're saying isn't true, because I agree with you and said before that different models and brands can be different sizes. But none of it is a counter to what I said. Not sure if you meant it to be when you were replying to me.
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      01-10-2020, 05:14 PM   #114
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Originally Posted by Anthony1s View Post
Not saying what you're saying isn't true, because I agree with you and said before that different models and brands can be different sizes. But none of it is a counter to what I said. Not sure if you meant it to be when you were replying to me.
I just re-read what I replied to last night and I realized visualecho was wrong, he stated "no one follows any standard" which is untrue. But I guess I read it wrong with context to other posts about tire size, and I thought what he meant was some tires vary in size.

So in essence no I'm not disagreeing with you, I just misread a post and accidentally agreed with an inaccurate statement while trying to add a point.

Edit- changed post from yesterday.
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      01-11-2020, 12:56 PM   #115
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Here's a pic of my 265/35R19 Sottozero Serie II on 437m wheels... 2018 M2. On tirerack, these tires are designated for MO Mercedes.

Gets close, but no rubbing. It's raining when I took the pic, so you'd see water mark on the liner if the tire touched.

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      01-11-2020, 02:30 PM   #116
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Quote:
Originally Posted by SCCThree View Post
What I'm trying to say is: Love the 285/35 rears but the 255/35 fronts are shorter and it makes it look odd.
Of course it does, you went down in OD by .7 in the front, and up in OD by .6 in the rear, for a total of 1.3" difference from stock (.6" in gap).

285/30 would have been the correct rear size, but it's not offered in a PS4S.

The Firehawk Indy is made in the correct sizes; 265/30 F & 285/30 R.
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      01-12-2020, 07:54 PM   #117
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i put on a 255 35 19 winter tire with 10mm spacer today
stock suspension and it rubbed the passenger side ( LHD) front bumper fender . ..

makes me wonder if it will rub after lowering around 1.0/0.8 on KW HAS

Anyone know? Thanks!
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      01-13-2020, 02:03 AM   #118
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Quote:
Originally Posted by StackedM2C View Post
i put on a 255 35 19 winter tire with 10mm spacer today
stock suspension and it rubbed the passenger side ( LHD) front bumper fender . ..

makes me wonder if it will rub after lowering around 1.0/0.8 on KW HAS

Anyone know? Thanks!
I saw a race car in Japan ran a 255/30 19 front and 285/30 19 rear and dropped. Not sure how this setting affects the electronics though
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      01-13-2020, 07:55 AM   #119
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Quote:
Originally Posted by M335i View Post
Returned my F80 M3 and curious if the setup I had will fit the M2C. Stock suspension with no plans on lowering, just a daily driver. WillTheyFit puts the front 13.4mm and rear 12.4mm out more

VFF 101's with:
19x9.5 et22 265/35/19
19x10.5 et34 285/35/19
265/35 will rub unless you do fender liner modification.
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      06-16-2020, 05:47 AM   #120
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Hate to bring back this thread up but need advice ASAP. Put some 285/30r19 conti extremecontact sports on the rear and threw the balance I love off , with keeping stock MPSS 245/35/r19. Sadly conti doesn't make my tire in a 265/30 only a 265/35 and a 255/30 flavor. Want my cars dynamics back before a mountain trip I'm taking. Car is stock, but plan on camber plates
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      06-16-2020, 07:20 AM   #121
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Quote:
Originally Posted by Bewstd View Post
Hate to bring back this thread up but need advice ASAP. Put some 285/30r19 conti extremecontact sports on the rear and three the balance I love off with keeping the fronts for now. Sadly conti doesn't make my tire in a 265/30 only a 265/35 and a 255 flavor. Want my cars dynamics back before a mountain trip I'm taking. Car is stock, but plan on camber plates
I would go with the 275/30-19 up front and maybe at rear replacement time up the rear to 295/30-19.
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      06-16-2020, 08:20 AM   #122
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Quote:
Originally Posted by Bewstd View Post
Hate to bring back this thread up but need advice ASAP. Put some 285/30r19 conti extremecontact sports on the rear and three the balance I love off with keeping the fronts for now. Sadly conti doesn't make my tire in a 265/30 only a 265/35 and a 255 flavor. Want my cars dynamics back before a mountain trip I'm taking. Car is stock, but plan on camber plates
I'm not surprised, since that tire is .6 wider and .6 shorter than stock. Not only did you induce understeer, you unbalanced the car by negating rake by putting a shorter tire on the rear than on the front. Terrible move.

You will NEED to go wider and shorter on the fronts to compensate. You need the 255/30, as it's .5 wider and .8 shorter.

Quote:
Originally Posted by CSBM5 View Post
I would go with the 275/30-19 up front...
WAY too wide, and not short enough. I'd stop recommending tires until you know what the numbers mean.
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      06-16-2020, 08:29 AM   #123
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TW/OD

Stock front is 8.6 / 25.8
Stock rear is 9.6 / 26.3

The rear you added is 10.2 / 25.7, adding .6 to the TW and taking .6 away from the OD.

The closest match to compensate is the 255/30, which is 9.1 / 25, so .5 wider and .8 shorter.

If you went with 275/30 you'd be at 9.7 / 25.5, which is 1.1 wider and only .3 shorter.
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      06-16-2020, 09:04 AM   #124
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Quote:
Originally Posted by VisualEcho View Post
I'm not surprised, since that tire is .6 wider and .6 shorter than stock. Not only did you induce understeer, you unbalanced the car by negating rake by putting a shorter tire on the rear than on the front. Terrible move.

You will NEED to go wider and shorter on the fronts to compensate. You need the 255/30, as it's .5 wider and .8 shorter.



WAY too wide, and not short enough. I'd stop recommending tires until you know what the numbers mean.
Well, given decades of experience behind my thought process, I suppose you want more detail behind the thought? Also a 255/30-19 is way to small for the car. He needs to reacquire something approaching the original diameter stagger and width stagger not to mention the actual overall diameter.

The 275/30-19, 295/30-19 is a nice setup and appropriate for the car's weight even though they are slightly lower overall dia than stock. My goal was to get him back as close to that as possible.

A 255/30-19 is way too small of a diameter for the car and has a load index rating significantly less than the factory rating. I would say the advice about recommending tires should be looked at in the mirror.
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      06-16-2020, 09:23 AM   #125
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Installed 265/285/35r19 Re-71r on stock suspension with camber plates.
fills out fender nicely. little rub on front liner vent but heat gun fixed that. Short tires look stupid unless car is lowered. 275/30 in a ad08r was my second choice harder to get and considerably more /tire
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      06-16-2020, 09:56 AM   #126
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Quote:
Originally Posted by CSBM5 View Post
Well, given decades of experience behind my thought process, I suppose you want more detail behind the thought? Also a 255/30-19 is way to small for the car. He needs to reacquire something approaching the original diameter stagger and width stagger not to mention the actual overall diameter.

The 275/30-19, 295/30-19 is a nice setup and appropriate for the car's weight even though they are slightly lower overall dia than stock. My goal was to get him back as close to that as possible.

A 255/30-19 is way too small of a diameter for the car and has a load index rating significantly less than the factory rating. I would say the advice about recommending tires should be looked at in the mirror.
You're not making any sense.

All tire makes/models are not the same.

Look at the specs I listed, they are worth much more than mere sizes. It's the specs that need to be looked at, and the 255 is much closer to matching the specs of the new rear.
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      06-16-2020, 10:01 AM   #127
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Quote:
Originally Posted by VisualEcho View Post
You're not making any sense.

All tire makes/models are not the same.

Look at the specs I listed, they are worth much more than mere sizes. It's the specs that need to be looked at, and the 255 is much closer to matching the specs of the new rear.
Tire load index ratings for a given size are fixed by industry standard. The 255/30-19 is too low as it's rarely ever recommended (and definitely never approved at the car maker level) to install a lower load rating index than the car is designed with...in fact, most tire shops, corporate owned shops at least, have liability insurance policy stipulations that prevent them from such actions.

There is nothing about my prior post that doesn't make sense. Specifically illuminate why the 275/30-19 and 295/30-19 doesn't "make sense." If anything it only fails to replicate the stock diameter overall; but it does maintain near stock width and diameter stagger ratios, and it does exceed stock load index tire ratings.
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      06-16-2020, 10:04 AM   #128
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Quote:
Originally Posted by CSBM5 View Post
Tire load index ratings for a given size are fixed by industry standard. The 255/30-19 is too low as it's rarely ever recommended (and definitely never approved at the car maker level) to install a lower load rating index than the car is designed with...in fact, most tire shops, corporate owned shops at least, have liability insurance policy stipulations that prevent them from such actions.

There is nothing about my prior post that doesn't make sense. Specifically illuminate why the 275/30-19 and 295/30-19 doesn't "make sense." If anything it only fails to replicate the stock diameter overall; but it does maintain near stock width and diameter stagger ratios, and it does exceed stock load index tire ratings.
The specs of the 255/30 are closer in this particular tire, end of story. Argue with the wall if you wish, but only a nut would recommend a 275 in the front with a 285 in the rear. How many guys on this entire board run such sizes? How many guys on this entire board have fit a 275 to the stock front? Your specs are off, and you're just making shit up.
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      06-16-2020, 10:16 AM   #129
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Quote:
Originally Posted by VisualEcho View Post
The specs of the 255/30 are closer in this particular tire, end of story. Argue with the wall if you wish, but only a nut would recommend a 275 in the front with a 285 in the rear. How many guys on this entire board run such sizes? How many guys on this entire board have fit a 275 to the stock front? Your specs are off, and you're just making shit up.
Honestly, you don't know what you're talking about here. If he wants to maintain the front-rear width stagger, he must head toward a 265/30-19 which isn't available to him in his tire. Hence the problem. The choice at that point is either one size up or down (assuming availability in specific tire). Going down in size to a 255/30-19, creating a 30mm width stagger will result in balance further toward understeer; in addition, it's not something desirable for all the reasons I stated before (lower than factory load rating, not to mention most any shop will not install that tire on the car for that specific (and legal) reason). Tirerack will not sell that tire to you for the car.

The other choice is to use the 275/30-19. If fits "ok" on a 9" wheel. It fits the car without rubbing assuming stock wheel, stock suspension. It's diameter stagger vs the 285/30-19 is one size increment less (as opposed to three in your suggested case) as its width stagger than stock. It won't result in even more understeer bias at all; the opposite in fact. It's load index rating is sufficient (and legally installable) for the car. The car will drive fine and feel great with the combo; and when the rears wear out, going to the 295/30-19 yields the combo I was recommending. DSC and ABS still will function ok with this slightly smaller diameter stagger than stock.

Engineering is pretty straightforward on this...and I've never "made shit up" in my life. It would be nice to not have continual personal attacks and let's discuss facts.
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      06-16-2020, 10:27 AM   #130
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Quote:
Originally Posted by CSBM5 View Post
Honestly, you don't know what you're talking about here. If he wants to maintain the front-rear width stagger, he must head toward a 265/30-19 which isn't available to him in his tire. Hence the problem. The choice at that point is either one size up or down (assuming availability in specific tire). Going down in size to a 255/30-19, creating a 30mm width stagger will result in balance further toward understeer; in addition, it's not something desirable for all the reasons I stated before (lower than factory load rating, not to mention most any shop will not install that tire on the car for that specific (and legal) reason). Tirerack will not sell that tire to you for the car.

The other choice is to use the 275/30-19. If fits "ok" on a 9" wheel. It fits the car without rubbing assuming stock wheel, stock suspension. It's diameter stagger vs the 285/30-19 is one size increment less (as opposed to three in your suggested case) as its width stagger than stock. It won't result in even more understeer bias at all; the opposite in fact. It's load index rating is sufficient (and legally installable) for the car. The car will drive fine and feel great with the combo; and when the rears wear out, going to the 295/30-19 yields the combo I was recommending. DSC and ABS still will function ok with this slightly smaller diameter stagger than stock.

Engineering is pretty straightforward on this...and I've never "made shit up" in my life. It would be nice to not have continual personal attacks and let's discuss facts.
Blah ditty blah blah blah.

Look at the specs again.

With the rear tire he has chosen, the 255 is closer to getting him back to stock spec, or do you not understand basic math? I posted the exact specs, and all you can say is "OMG load rating."
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      06-16-2020, 10:45 AM   #131
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Quote:
Originally Posted by VisualEcho View Post
I'm not surprised, since that tire is .6 wider and .6 shorter than stock. Not only did you induce understeer, you unbalanced the car by negating rake by putting a shorter tire on the rear than on the front. Terrible move.

You will NEED to go wider and shorter on the fronts to compensate. You need the 255/30, as it's .5 wider and .8 shorter.

.
Awesome, Wish I could stuff the 265/35r19 on the stock wheels in their but the rubbing turns me off as I drive the car pretty hard.
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      06-16-2020, 12:39 PM   #132
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Quote:
Originally Posted by VisualEcho View Post
TW/OD

Stock front is 8.6 / 25.8
Stock rear is 9.6 / 26.3

The rear you added is 10.2 / 25.7, adding .6 to the TW and taking .6 away from the OD.

The closest match to compensate is the 255/30, which is 9.1 / 25, so .5 wider and .8 shorter.

If you went with 275/30 you'd be at 9.7 / 25.5, which is 1.1 wider and only .3 shorter.

the 285/30 rear actually says 11.4 on conti's website
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