[///MPhatic]

Originally Posted by Dabozo

old thread i know...but hoping someone can chime in and help. Im no expert like many of you and am quite honestly overwhelmed with wheel/tire choices.

Looking for some assistance with tires. Ive been runnning stock sizes and stock wheels since i bought the car.

2017 M2 lowered on Eibach. No camber plates.

Just purchased Apex VS5-RS 19 x 9.5 +22 and 19 x 10.5 +45
Existing stock tires wont cut it with the crazy stretch. I like a much squarer look.

I dont track. But drive spritely.

I was thinking max 295/30 in rear and 275/30 in front. Semi confident with rears but thinking 275 may be too aggressive in front with my drop. I already get rare rub (on big dips) with my fronts, using 12mm spacers.

Would appreciate any help...ive read through all these pages and my eyes are watering lol..TIA

Forget 275/30 up front.
Forget 265/30 up front.

In fact, forget every size up front other than stock, and then you'll still probably rub at times.

Remember that the stock front 245/35 Star Spec runs WIDE, so a lot of guys have issues with it rubbing with it, but the moment they change to the PS4S they have no issues (skinnier tire).

So choose your TIRE make and model before you choose your sizes, then research the differences in tread width on TireRack.

[Dabozo]

appreciate the feedback. I have zero rub up front on stock Michelin pss's and they are stretched on a 9.5 wheel.
My other option was 255/35 up front with Michelin 4S's. But yes, you are correct in that not all tires created equally and def need to consider actual widths of different manufacturers.

i think I should be good in rear with 295/30 P4S's. Front is def the tricky one..

[///MPhatic]

Originally Posted by Dabozo

appreciate the feedback. I have zero rub up front on stock Michelin pss's and they are stretched on a 9.5 wheel.
My other option was 255/35 up front with Michelin 4S's. But yes, you are correct in that not all tires created equally and def need to consider actual widths of different manufacturers.

i think I should be good in rear with 295/30 P4S's. Front is def the tricky one..

The rear is much easier to fit for sure. I think the problem really starts when you consider how to preserve the playfulness of the car, as doing something like 245/295 can really upset the balance.

I adore the OE Cup240 fitment on 9.5 & 10.5, but that tire isn't for everyone for sure, and does run skinny. I'm low enough that it still rubs in the front a bit, even being skinny.

Perl Side. by Andrew Thompson, on Flickr

Gratuitous rear shot. by Andrew Thompson, on Flickr

Sidelined. by Andrew Thompson, on Flickr

[Dabozo]

car looks amazing MPhatic! Those are the wheels i had hoped t be able to get...but...$$$$ lol

[///MPhatic]

Originally Posted by Dabozo

car looks amazing MPhatic! Those are the wheels i had hoped t be able to get...but...$$$$ lol

I hear you. I wanted them before I even bought the car, but had to wait a few years to find a decent deal on a used set. Very happy I did!

[Dabozo]

im slowly coming to the realization that I f'd up big on my front offsets�� Should have just stuck with my original choice of +28 (were on backorder) but Impatient me thought I could make +22 work. Using oem width up front isn't an option with 295's in back for fear of imbalances.

So what are my options?
-camber plates? Think ive read even -2.5-3 won't cut it with a 265/30 plus tire up front.
-return car to stock springs and live with the fender gap?
-coil overs (rather not due to cost)

A 255/35/19 should fit no issues up front but a)I fear it will still be a wide gap between 255 and 295 and b)tire will still be too stretched for my liking...

[CSBM5]

That +28 9.5 up front I'm pretty sure is really the sweet spot to making things fit. The easiest solution is just order a pair, and when they come in sell the +22 wheels. Those are best sold on the E9x M3 section as it's a perfect fit up front on that platform. I had the Apex 9.5x19 +22 and 10.5x19 +22 wheels on my E90 M3, and they fit perfectly. I did try fitting the fronts on the M2C (255/35 PS4S on them), but they simply had too much poke, too much backspacing.

[///MPhatic]

Originally Posted by Dabozo

im slowly coming to the realization that I f'd up big on my front offsets�� Should have just stuck with my original choice of +28 (were on backorder) but Impatient me thought I could make +22 work. Using oem width up front isn't an option with 295's in back for fear of imbalances.

So what are my options?
-camber plates? Think ive read even -2.5-3 won't cut it with a 265/30 plus tire up front.
-return car to stock springs and live with the fender gap?
-coil overs (rather not due to cost)

A 255/35/19 should fit no issues up front but a)I fear it will still be a wide gap between 255 and 295 and b)tire will still be too stretched for my liking...

Camber plates and NVH are in your future if you're looking for wide front tires + low.

Originally Posted by CSBM5

That +28 9.5 up front I'm pretty sure is really the sweet spot to making things fit.

Only if you're on stock suspension. If you're running Ohlins, KWV3, MPS, etc, you need an extra 5mm, which is why you see all these guys with Apex wheels running 5mm spacers to give them +23.

[Dabozo]

[/QUOTE]Only if you're on stock suspension. If you're running Ohlins, KWV3, MPS, etc, you need an extra 5mm, which is why you see all these guys with Apex wheels running 5mm spacers to give them +23.[/QUOTE]

Mphatic can you explain this to me? why would spacers be required with coilovers but not with stock suspension..?

[AlpinewhiteM2C]

Originally Posted by Dabozo

im slowly coming to the realization that I f'd up big on my front offsets�� Should have just stuck with my original choice of +28 (were on backorder) but Impatient me thought I could make +22 work. Using oem width up front isn't an option with 295's in back for fear of imbalances.

So what are my options?
-camber plates? Think ive read even -2.5-3 won't cut it with a 265/30 plus tire up front.
-return car to stock springs and live with the fender gap?
-coil overs (rather not due to cost)

A 255/35/19 should fit no issues up front but a)I fear it will still be a wide gap between 255 and 295 and b)tire will still be too stretched for my liking...

-2 to -2.5 is more than enough to fit 265/30 tires up front with a 19x9.5 +22 offset wheel, especially if you're going with a street tire such as the PS4S. It's when you run the 200TW tires such as the 275/30 Falken RT660s that you'll need more camber as they have wider section as well as thread width (RT660 11.1 section/ 10.2 thread vs PS4S 10.9 section/ 9.7 thread). I know this from first hand experience.

However as mphatic pointed out, you'll need camber plates to get -2 or more camber. Using the OEM camber correction hubs will get you -2 degrees but will be a tight fit. If you ever want more camber, you'll end up getting camber plates down the line.

One thing to keep in mind w/ camber plates, especially the ones that uses metal spherical bushings like Vorshlog or Ground Control is that you'll get more NVH. Some roads like smoother asphalt doesn't magnify the increase in NVH as much. However if you drive on concrete highways or older asphalt like what we normally encounter here in the greater Seattle area, you will notice NVH increase more.

If you want to keep the wheels but don't want to bother with camber plates or coilovers, it may not be all bad to run 255/35 front and 275/35 rear. The stretch you get (.5 greater wheel width v. thread width) by running 255 w/ 9.5 front and 275 w/ 10.5 rear is actually ideal from a sidewall support point of view to maximize tire performance.

[///MPhatic]

Originally Posted by Dabozo

Mphatic can you explain this to me? why would spacers be required with coilovers but not with stock suspension..?

The spring is larger, giving you less room on the inside.

[CSBM5]

Originally Posted by Dabozo

Only if you're on stock suspension. If you're running Ohlins, KWV3, MPS, etc, you need an extra 5mm, which is why you see all these guys with Apex wheels running 5mm spacers to give them +23.

Mphatic can you explain this to me? why would spacers be required with coilovers but not with stock suspension..?

If you look at a front stock suspension, you'll see the spring is entirely contained above the tire with the lower spring support usually extending out over the top of the tread face. Most coilover designs use a smaller diameter spring, but it is longer and extends downward on the strut tube such that it is adjacent to the tire sidewall. Typically the spring adjuster nut to sidewall distance is the critical dimension. Note that depending on the ride height chosen (and the specific coilover design and spring rate and free length), sometimes the adjuster nut and therefore also the spring are high enough not to interfere with the sidewall (said as a general comment, not one specific to the F87). Additionally, the design of the tire sidewall comes into play here since even though two same sized tires might even have the same measured section width, some tires extend their section width out to the tread face while most tires taper the sidewall. (i.e. something like a BFG R1 or Rival is known for rubbing due to this reason, spoken from unfortunate experiences with both tire designs compared to Hoosiers).

[///MPhatic]

Originally Posted by CSBM5

If you look at a front stock suspension, you'll see the spring is entirely contained above the tire with the lower spring support usually extending out over the top of the tread face. Most coilover designs use a smaller diameter spring, but it is longer and extends downward on the strut tube such that it is adjacent to the tire sidewall. Typically the spring adjuster nut to sidewall distance is the critical dimension. Note that depending on the ride height chosen (and the specific coilover design and spring rate and free length), sometimes the adjuster nut and therefore also the spring are high enough not to interfere with the sidewall (said as a general comment, not one specific to the F87). Additionally, the design of the tire sidewall comes into play here since even though two same sized tires might even have the same measured section width, some tires extend their section width out to the tread face while most tires taper the sidewall. (i.e. something like a BFG R1 or Rival is known for rubbing due to this reason, spoken from unfortunate experiences with both tire designs compared to Hoosiers).

Thanks for that dissertation.

However, what I said still stands. If you have an aftermarket coil-over set you'll need +23 or nearly, not +28 unless you're the weirdo that buys coil-overs to keep the car stock height.