[///M TOWN]

Are you running these larger ⭐️ tires on your M2? …I’d love to get some thoughts and feedback if you are

I want to run star tires preferably and I believe these were made for F80/82

Someone please correct me if I am actually wrong

[varooshgog]

Not running them, but know plenty of people are with great success. Should have no issues and should provide some more rear grip (which can be especially useful if you have some power mods).

I personally like keeping stock sizes (keeps the car feeling darty and playful) but your feeling may vary.

[///MPhatic]

Originally Posted by ///M TOWN

Are you running these larger ⭐️ tires on your M2? …I’d love to get some thoughts and feedback if you are

I want to run star tires preferably and I believe these were made for F80/82

Someone please correct me if I am actually wrong

I would imagine that the F87 is close enough to the F80/82 that it wouldn't matter much. I certainly can't see it being detrimental. In fact, I'd bet that you'd benefit heavily from choosing the Star Spec.

[///M TOWN]

Originally Posted by ///MPhatic

I would imagine that the F87 is close enough to the F80/82 that it wouldn't matter much. I certainly can't see it being detrimental. In fact, I'd bet that you'd benefit heavily from choosing the Star Spec.

Considering I believe it was you that said the standard issue 4S were the Honda Accord of tires, I highly appreciate you’re thoughts 💭 on this

[DanG]

I ran those with stock rims and switched them over to my BBS CI-R rims. Tires are Michelin PS4Ss 255/35/19 front and 275/35/19 rears. No problems with either wheel.

P.S. The Star spec 4Ss were designed for the G series BMWs. I chose the non star spec tires. Also the Star spec 275/35/19 is the front tire on the G87. Tire Rack says you can use either one.

[DanG]

Just found this. The test was done on a G series but it is interesting:

[///M TOWN]

Originally Posted by DanG

I ran those with stock rims and switched them over to my BBS CI-R rims. Tires are Michelin PS4Ss 255/35/19 front and 275/35/19 rears. No problems with either wheel.

P.S. The Star spec 4Ss were designed for the G series BMWs. I chose the non star spec tires. Also the Star spec 275/35/19 is the front tire on the G87. Tire Rack says you can use either one.

I show a set of them being for the F80/82.

My buddy is running them on his 16 F82.

Also the Z4 comes with them in 255/275.

The problem I have with the non-star spec 4S is the sidewall. It’s too soft for me. I don’t like it at all, it’s not crisp enough.

[DanG]

Originally Posted by ///M TOWN

I show a set of them being for the F80/82.

My buddy is running them on his 16 F82.

Also the Z4 comes with them in 255/275.

The problem I have with the non-star spec 4S is the sidewall. It’s too soft for me. I don’t like it at all, it’s not crisp enough.

Add a strut bar to your M2 it will crisp up your steering feel. I have zero problems with the non star 4Ss on the street or track.

[///M TOWN]

Originally Posted by DanG

Add a strut bar to your M2 it will crisp up your steering feel. I have zero problems with the non star 4Ss on the street or track.

That’s not it at all…

I’m clearly more picky than you

[///M TOWN]

Pilot Sport S5 can’t come soon enough

[DanG]

Originally Posted by ///M TOWN

That’s not it at all…

I’m clearly more picky than you

I should let you drive my M2. You will definitely feel the difference.

[quenotte]

Originally Posted by DanG

I ran those with stock rims and switched them over to my BBS CI-R rims. Tires are Michelin PS4Ss 255/35/19 front and 275/35/19 rears. No problems with either wheel.

P.S. The Star spec 4Ss were designed for the G series BMWs. I chose the non star spec tires. Also the Star spec 275/35/19 is the front tire on the G87. Tire Rack says you can use either one.

Yes you're right to have chosen the non star spec tires

Michelin PS4S 255/35/19 * => G20 REAR mount (Front size for F87)
Michelin PS4S 275/35/19 * => G8x FRONT mount (Rear size for F87)
=> Not correct for a F8x (front/rear mismatch)

So we should NOT use Michelin PS4S * on F8x

[Swank]

I’ve had the non star 255/275 4S on my car for about 6 months now and very happy with them. I’ve use them as my daily summer tire with a few autocrosses and one track event. Still have plenty of life in them and will likely try to make them last until the 5s is available.

[///M TOWN]

Originally Posted by Swank

I’ve had the non star 255/275 4S on my car for about 6 months now and very happy with them. I’ve use them as my daily summer tire with a few autocrosses and one track event. Still have plenty of life in them and will likely try to make them last until the 5s is available.

The S5 will be a welcome addition

Thanks for sharing your thoughts

[///MPhatic]

Originally Posted by ///M TOWN

Pilot Sport S5 can’t come soon enough

So much truthbombs.

[///MPhatic]

Originally Posted by quenotte

Yes you're right to have chosen the non star spec tires

Michelin PS4S 255/35/19 * => G20 REAR mount (Front size for F87)
Michelin PS4S 275/35/19 * => G8x FRONT mount (Rear size for F87)
=> Not correct for a F8x (front/rear mismatch)

So we should NOT use Michelin PS4S * on F8x

That's not correct at all.

[///M TOWN]

Originally Posted by ///MPhatic

That's not correct at all.

https://youtu.be/XLMDSjCzEx8?si=xXJMF1p688pWJF3s&t=97

“I’m not talking about what they can do…I’m talking about what they’re designed to do”

[mattr832]

Originally Posted by DanG

Add a strut bar to your M2 it will crisp up your steering feel. I have zero problems with the non star 4Ss on the street or track.

You usually go to the Ridge or Pacific? I'll be at Pacific on 10/4 for some afternoon lapping.

[DanG]

Originally Posted by mattr832

You usually go to the Ridge or Pacific? I'll be at Pacific on 10/4 for some afternoon lapping.

I have done them both. But I have retired from being a track rat.

[bitcore]

Originally Posted by quenotte

Yes you're right to have chosen the non star spec tires

Michelin PS4S 255/35/19 * => G20 REAR mount (Front size for F87)
Michelin PS4S 275/35/19 * => G8x FRONT mount (Rear size for F87)
=> Not correct for a F8x (front/rear mismatch)

So we should NOT use Michelin PS4S * on F8x

I hear this parroted elsewhere - regarding the axle each section with comes on from a factory, and which G series chassis they are used on. What's unclear, is if where BMW happens to use these sizes in OE applications actually matters. I don't think it does.

Consider the information contained in the 'Tire Reviews' video posted earlier in this thread. One could assume that the differences for the Michelin BMW "star" model compared to the OEM PS4s (reported as mainly the compounds used across section with and differences in the ply construction) would be consistent across the various available sizes of tire for a given rim diameter. One could also assume that these custom specifications would remain similar, regardless of which axle or chassis BMW decided to use them on in OE applications. After all, there are no application specific notes that I could see to denote a front vs. rear fitment.


What we do know, is that BMW changes the tire make/model completely for the different generations and trim levels of M2, and they didn't seem too picky about what tire they sold you on the OG M2 right out of the factory - at least in the NA market that I'm familiar with.

OG N55 M2's came with either Continental Sport Contact 3 or BMW Star Michelin PSS's. Luck of the draw, and you had no real choice.
My M2C came with BMW Star Michelin PSS's, and seems all others who sourced their car new from a dealership appeared to have as well (from my limited research)
M2CS's come with Cup2's (I don't know if these also had a BMW star designation or not)


I'm personally inclined to believe that BMW has a uniform design specification of compound and ply design for the MPS4s "star" tire, which is the same across the available section widths. I believe this is to better match BMW's desired driving dynamics in general since they are buying hundreds of thousands of the tires. I believe this makes much more sense from a business, logistics, and supply chain/SKU count perspective - rather than demanding unique specifications for each unique section width/size, with the explicit intent of only using that size tire on a single axle of a particular chassis. These are mass produced BMW's, not a koenigsegg, lamborghini, mclaren, or bugatti hypercar.

Additionally, consider that Michelin produces this tire for various other manufactures, also likely with customizations (source: Michelin Website:
OE [Vehicle Manufacturer] Sidewall Markings: K# = Ferrari, MO= Mercedes-Benz, N# = Porsche, TPC = GM, * = BMW
OE Code [Original Equipment Key]: BMW = BMW, FER = Ferrari, MB = Mercedes-Benz, GM = General Motors, CAD = Cadillac, FOR = Ford, POR = Porsche, LEX = Lexus



I'd assert that for the sake of this argument, what really matters is if you use the same type (BMW star, or not) on both front and rear axles, regardless of the size you use.

For me, if prices between the two were comparable, I'd go for the BMW star designated tire - as I value the same goals BMW had when they customized the tire. But I personally wouldn't pay a premium of more than $30 per tire just to get that designation.
I run a square 255/35/19 setup anyway, A) for more fun, and B) so I can rotate between front back.

[chris719]

Originally Posted by bitcore

I hear this parroted elsewhere - regarding the axle each section with comes on from a factory, and which G series chassis they are used on. What's unclear, is if where BMW happens to use these sizes in OE applications actually matters. I don't think it does.

Consider the information contained in the 'Tire Reviews' video posted earlier in this thread. One could assume that the differences for the Michelin BMW "star" model compared to the OEM PS4s (reported as mainly the compounds used across section with and differences in the ply construction) would be consistent across the various available sizes of tire for a given rim diameter. One could also assume that these custom specifications would remain similar, regardless of which axle or chassis BMW decided to use them on in OE applications. After all, there are no application specific notes that I could see to denote a front vs. rear fitment.


What we do know, is that BMW changes the tire make/model completely for the different generations and trim levels of M2, and they didn't seem too picky about what tire they sold you on the OG M2 right out of the factory - at least in the NA market that I'm familiar with.

OG N55 M2's came with either Continental Sport Contact 3 or BMW Star Michelin PSS's. Luck of the draw, and you had no real choice.
My M2C came with BMW Star Michelin PSS's, and seems all others who sourced their car new from a dealership appeared to have as well (from my limited research)
M2CS's come with Cup2's (I don't know if these also had a BMW star designation or not)


I'm personally inclined to believe that BMW has a uniform design specification of compound and ply design for the MPS4s "star" tire, which is the same across the available section widths. I believe this is to better match BMW's desired driving dynamics in general since they are buying hundreds of thousands of the tires. I believe this makes much more sense from a business, logistics, and supply chain/SKU count perspective - rather than demanding unique specifications for each unique section width/size, with the explicit intent of only using that size tire on a single axle of a particular chassis. These are mass produced BMW's, not a koenigsegg, lamborghini, mclaren, or bugatti hypercar.

Additionally, consider that Michelin produces this tire for various other manufactures, also likely with customizations (source: Michelin Website:
OE [Vehicle Manufacturer] Sidewall Markings: K# = Ferrari, MO= Mercedes-Benz, N# = Porsche, TPC = GM, * = BMW
OE Code [Original Equipment Key]: BMW = BMW, FER = Ferrari, MB = Mercedes-Benz, GM = General Motors, CAD = Cadillac, FOR = Ford, POR = Porsche, LEX = Lexus



I'd assert that for the sake of this argument, what really matters is if you use the same type (BMW star, or not) on both front and rear axles, regardless of the size you use.

For me, if prices between the two were comparable, I'd go for the BMW star designated tire - as I value the same goals BMW had when they customized the tire. But I personally wouldn't pay a premium of more than $30 per tire just to get that designation.
I run a square 255/35/19 setup anyway, A) for more fun, and B) so I can rotate between front back.

Why would you believe that the compound BMW selects for a G20 is the same as the compound BMW M selects for the G8x? If I were BMW I would not specify nearly as aggressive a compound for the G20. I'm not saying you're wrong since only Michelin and BMW know, but the logic you use to dismiss the front/rear difference is not really compatible your prediction on the compounds.

BTW, there is also a Michelin PDF floating around that I can't find that suggests what PSS and PS4S to fit on all F8x and G8x. The PDF suggests non-star PS4S for the M2.

Edit - Here is the PDF:

https://michelinracingusa.com/wp-con...oduction-4.pdf

Well, perhaps you are correct. If you look at the F8x recommendation the rear is 21325 which is a star spec tire and the front also appears to be, 97665. So, if you do order PS4S Star 255/275 be careful because there are actually two different Star 255/35/19s. What the difference is, I don't know.

[bitcore]

Originally Posted by chris719

Why would you believe that the compound BMW selects for a G20 is the same as the compound BMW M selects for the G8x? If I were BMW I would not specify nearly as aggressive a compound for the G20. I'm not saying you're wrong since only Michelin and BMW know, but the logic you use to dismiss the front/rear difference is not really compatible your prediction on the compounds.

BTW, there is also a Michelin PDF floating around that I can't find that suggests what PSS and PS4S to fit on all F8x and G8x. The PDF suggests non-star PS4S for the M2.

Edit - Here is the PDF:

https://michelinracingusa.com/wp-con...oduction-4.pdf

Well, perhaps you are correct. If you look at the F8x recommendation the rear is 21325 which is a star spec tire and the front also appears to be, 97665. So, if you do order PS4S Star 255/275 be careful because there are actually two different Star 255/35/19s. What the difference is, I don't know.

Yeah, the challenge here is that we can really only speculate. In all likelihood, I'm probably wrong in my assumptions. Nice find on that homologation document.

I've not read through this thread, but apparently there's a wealth of accumulated knowledge here with some gems that may translate over to the F87 platform: https://f80.bimmerpost.com/forums/sh....php?t=1350040