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      03-12-2021, 11:15 PM   #1079
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34-35psi is the sweet spot IMO, comfortable yet responsive to steering input
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      03-12-2021, 11:59 PM   #1080
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Don't want to hijack the thread but since they do not make PS4S in the oem 18s size, what is the natural progression for the 513M wheels?

265/35/18 and 285/35/18?

The car will be lowered and on 15/12mm spacers, would like to avoid rubbing as much as possible.
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      03-21-2021, 11:42 AM   #1081
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Figured I'd chime in.

Recently swapped the OEM star spec PSS out for 265/35/19 front and 275/35/19 rear PS4s.

I think next time around I'll stick to the 255 in the front. The steering feel and turn in feels more lethargic with the 265 ps4.

Rear grip is greatly improved, rear end feels much more planted.

Initially ran the recommended 32psi, this is far too squishy and squirmy. 35-36 is better, but still too much roll over at speed in corners. I'm at 38 (cold - but FL so ~70-80 degrees). At temp they get to around 40-42 psi. I've found this is proper, the suspension dampening feels well matched to the tires.

Are they better than the PSS? Eh, negligibly. Really not a huge difference. Most of the things I've noticed I think are more related to the change in tire size than the tires themselves. They do fill out the wheel wells a lot more, much chunkier.

Overall, I think I'll give 255's up front a go next time, I think the 265 PS4 is just too much tire for the stock non-comp wheels. Pretty happy with the 275 in the rear though.
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      03-25-2021, 02:28 PM   #1082
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Quote:
Originally Posted by aboulfad View Post
Just got the PS4S 265/285 35R19 for my stock M4. My previous stock MPSS (255/275 35R19) were finished. Don't know if its because its a new tire and has more rubber than the used MPSS, but the PS4S are super quiet/comfy on our horrible roads here.

No opinions on performance yet. As to aesthetics, I personally prefer way more the look of the older MPSS compared to the PS4S. The PS4S kinda make the 19" 437" look small... (coined donut look) (I ordered MPSS 265M0/295* but only to find out they were old stock)

Looks kinda donuty
I also feel that the super sports, look better too. the P4S has this square look. I'm sort of leaning towards the Continental Extremecontact sports, for this rounder sidewall look and wet handling, plus its like 70 bucks cheaper each. How much worse can these Continentals be in dry straight line traction?
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      03-26-2021, 05:47 AM   #1083
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Quote:
Originally Posted by Gotulukn View Post
I also feel that the super sports, look better too. the P4S has this square look. I'm sort of leaning towards the Continental Extremecontact sports, for this rounder sidewall look and wet handling, plus its like 70 bucks cheaper each. How much worse can these Continentals be in dry straight line traction?
tbh that was my first initial impression when the tires were installed. Now I don't think twice about the looks and enjoy the performance of the PS4S both on wet & dry. Sorry don't know much about the Contis, small advice is to take aesthetics & small difference in cost out of the equation (if possible). Good luck with your choice!
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      03-26-2021, 06:09 AM   #1084
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Quote:
Originally Posted by Zomboss View Post
With the amount of driving I do during the pandemic, I can probably get another 3-4 years on my PS4S before I need to replace them. I found that increasing the tire pressure on the PS4S to 34-35 PSI on the front helps with the steering response. I did not observe the front-back sway issue with all four on PS4S.
The PS4S indeed seem to favor higher inflation pressures.
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      03-27-2021, 09:44 AM   #1085
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Quote:
Originally Posted by aboulfad View Post
tbh that was my first initial impression when the tires were installed. Now I don't think twice about the looks and enjoy the performance of the PS4S both on wet & dry. Sorry don't know much about the Contis, small advice is to take aesthetics & small difference in cost out of the equation (if possible). Good luck with your choice!
Thanks! I guess I'll try to get over the anesthetics too. Just purchased Mich ps4s 285/35 for the stock 19 rears! $735 for two tires 🥲
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      04-24-2021, 07:30 PM   #1086
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Just an update in case anyone was contemplating tire sizes/combis for the PS4S on the 20-inch 666Ms:

I was on PS4S 265/30/20s up front and PSS 285/30/20 in the rear and wasn't a fan of how the car drove, even after the mold release lubricant wore off. I think a big part of the issue was mixing the two different types of tires. I'll never do that again unless I absolutely can't help it, and even then I would try to get a full set asap.

Today I switched everything out to PS4S 275/30/20s in the front and PS4S 295/30/20s in the rear, and even though they're brand new I'm really enjoying the drive already. Haven't pushed it too hard but there's a marked improvement in the grip all-around, and I don't feel any worsening of the steering response despite the wider front contact patch. 33 psi cold on all four.

The thicker side wall fills the wheel well a bit better, and is noticeably more comfortable to ride on, as one should expect. Quieter for sure, though less of an issue for me since I usually drive with the top down and get a lot more ambient noise anyway.

Waiting to see how it drives after breaking in, but as it stands it's already quite confidence-inspiring. Feels as if the car was meant to come fitted with 275F/295Rs on the PS4S.
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      04-30-2021, 03:16 AM   #1087
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Quote:
Originally Posted by therealkenc View Post
Just an update in case anyone was contemplating tire sizes/combis for the PS4S on the 20-inch 666Ms:

I was on PS4S 265/30/20s up front and PSS 285/30/20 in the rear and wasn't a fan of how the car drove, even after the mold release lubricant wore off. I think a big part of the issue was mixing the two different types of tires. I'll never do that again unless I absolutely can't help it, and even then I would try to get a full set asap.

Today I switched everything out to PS4S 275/30/20s in the front and PS4S 295/30/20s in the rear, and even though they're brand new I'm really enjoying the drive already. Haven't pushed it too hard but there's a marked improvement in the grip all-around, and I don't feel any worsening of the steering response despite the wider front contact patch. 33 psi cold on all four.

The thicker side wall fills the wheel well a bit better, and is noticeably more comfortable to ride on, as one should expect. Quieter for sure, though less of an issue for me since I usually drive with the top down and get a lot more ambient noise anyway.

Waiting to see how it drives after breaking in, but as it stands it's already quite confidence-inspiring. Feels as if the car was meant to come fitted with 275F/295Rs on the PS4S.
Your post was very helpful. Can you confirm that you are on stock suspension? I'm about to pull the trigger on the same tire setup.
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      04-30-2021, 06:35 AM   #1088
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Quote:
Originally Posted by therealkenc View Post
I upped the front pressure to 38 psi (hot) and the car still doesn't feel planted the way it used to around the bends
I run PS4s fronts (33 psi) with Turner Motorsport monoball control arms and the alignment set at 1/2 factory toe. I have great feel and turn in response.

763m 19s with 265/35/19
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      04-30-2021, 11:56 AM   #1089
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Quote:
Originally Posted by xjet04 View Post
Quote:
Originally Posted by therealkenc View Post
Just an update in case anyone was contemplating tire sizes/combis for the PS4S on the 20-inch 666Ms:

I was on PS4S 265/30/20s up front and PSS 285/30/20 in the rear and wasn't a fan of how the car drove, even after the mold release lubricant wore off. I think a big part of the issue was mixing the two different types of tires. I'll never do that again unless I absolutely can't help it, and even then I would try to get a full set asap.

Today I switched everything out to PS4S 275/30/20s in the front and PS4S 295/30/20s in the rear, and even though they're brand new I'm really enjoying the drive already. Haven't pushed it too hard but there's a marked improvement in the grip all-around, and I don't feel any worsening of the steering response despite the wider front contact patch. 33 psi cold on all four.

The thicker side wall fills the wheel well a bit better, and is noticeably more comfortable to ride on, as one should expect. Quieter for sure, though less of an issue for me since I usually drive with the top down and get a lot more ambient noise anyway.

Waiting to see how it drives after breaking in, but as it stands it's already quite confidence-inspiring. Feels as if the car was meant to come fitted with 275F/295Rs on the PS4S.
Your post was very helpful. Can you confirm that you are on stock suspension? I'm about to pull the trigger on the same tire setup.
I'm on stock ZCP suspension with EDC
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      04-30-2021, 11:59 AM   #1090
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Quote:
Originally Posted by YKIGI View Post
Quote:
Originally Posted by therealkenc View Post
I upped the front pressure to 38 psi (hot) and the car still doesn't feel planted the way it used to around the bends
I run PS4s fronts (33 psi) with Turner Motorsport monoball control arms and the alignment set at 1/2 factory toe. I have great feel and turn in response.

763m 19s with 265/35/19
I had issues on my earlier set with 265 PS4S up front and the stock 285 PSS in the rear. The mixed set prob had more impact on the feel than the slight psi variation.

So far my 275/295 PS4S set is working well, haven't had to toy with the psi yet.
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      05-02-2021, 06:36 PM   #1091
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Made in France vs. Made in USA and OEM star

Hi all - apologies if this has already been discussed as I haven't been on the forum for a while... recently got new shoes for my F82 ZCP. Noticed that my fronts were made in France and my rears were made in the USA. Didn't realize Michelin Pilot Sports here-- any meaningful difference? Also, how come the 4s do not have the star symbol that the PSS my car originally came with had on the sidewall? Thanks!
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      05-16-2021, 11:47 PM   #1092
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After reading the thread, was interested in the 265/285 setup that the majority seem to be a fan of, but my tire place says the 265s are backordered. All the other sizes are available though.

What would be the downside of going 255/35/19 front and 275/35/19 rears for the PS4S? Isn't that the closest to the OEM Super Sports in terms of size? I could run 255/285s but not sure if that would throw anything off. Thanks in advance for any advice.
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      05-19-2021, 10:35 AM   #1093
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Quote:
Originally Posted by Carbon Black E46 View Post
After reading the thread, was interested in the 265/285 setup that the majority seem to be a fan of, but my tire place says the 265s are backordered. All the other sizes are available though.

What would be the downside of going 255/35/19 front and 275/35/19 rears for the PS4S? Isn't that the closest to the OEM Super Sports in terms of size? I could run 255/285s but not sure if that would throw anything off. Thanks in advance for any advice.
I have 255/35 R19 and 275/35 R19 on MPS4s since Feb 2020 (roughly 9000 miles on them) TBH, I don't really feel any con of doing this. Traction is improved due to the compound. NVH doesn't seem much different, I swapped my MPSS at 3/32 or 4/32nds so it wasn't super worn down. I haven't tracked or AXed this car so I can't tell you how it is in those scenarios. I do drive spiritedly on the road though.

I would try to run 265/285 on my next set of tires, probably around early next year as this increases the side wall height and should improve on some comfort.
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      05-24-2021, 05:59 AM   #1094
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Worth a watch. Nice, detailed video on the difference between aftermarket and OE 4S G80 tyre.

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      05-24-2021, 11:17 AM   #1095
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Quote:
Originally Posted by SEXY-BEAST View Post
Hi all - apologies if this has already been discussed as I haven't been on the forum for a while... recently got new shoes for my F82 ZCP. Noticed that my fronts were made in France and my rears were made in the USA. Didn't realize Michelin Pilot Sports here-- any meaningful difference? Also, how come the 4s do not have the star symbol that the PSS my car originally came with had on the sidewall? Thanks!
I could be wrong but I believe the star indicates that particular tire size from that particular manufacturer is made to be paired with a certain vehicle as an OEM part.

It can also mean that the dimensions on that tire may not be directly comparable to other tires even if they have the same specifications.

For example 265/35/19 with star may not have "true" 265/35/19 measurements. It might be a little narrower for example and not truly measure 265mm.

If you want best and most predictable/precise tire fitment on aftermarket wheels you should choose tires without the star.
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      05-24-2021, 06:16 PM   #1096
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Not sure if this was answered, but on Tire rack, I noticed there are two "generic" PS4S available in 275/35/19, that are not a specific OE spec.

One is 100Y load rating and country of origin shows US.

Other is 96Y load rating and country of origin is France.

What is the difference and which is recommended if I am replacing my OE star spec super sports with PS4 on factory wheels?
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      05-28-2021, 06:54 PM   #1097
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Quote:
Originally Posted by rborane View Post
Not sure if this was answered, but on Tire rack, I noticed there are two "generic" PS4S available in 275/35/19, that are not a specific OE spec.

One is 100Y load rating and country of origin shows US.

Other is 96Y load rating and country of origin is France.

What is the difference and which is recommended if I am replacing my OE star spec super sports with PS4 on factory wheels?
Would guess that the higher load rating will have a stiffer sidewall. Surprisngly it's the cheaper tire too.

I would go with 100Y if I were you.
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      06-05-2021, 05:16 AM   #1098
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Quote:
Originally Posted by rborane View Post
Not sure if this was answered, but on Tire rack, I noticed there are two "generic" PS4S available in 275/35/19, that are not a specific OE spec.

One is 100Y load rating and country of origin shows US.

Other is 96Y load rating and country of origin is France.

What is the difference and which is recommended if I am replacing my OE star spec super sports with PS4 on factory wheels?
What you need to do is go too the specs and check the tread width. This is probably the most critical and telling spec on a tire, that is how you know how wide the tire really is. In general terms you want your wheels to be +/-.5 of the tread width. If the tread width is equal to the wheel width the tire is going to have that square look. Greater tread width will make it look bulbous and negative will make it look stretched.
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      06-10-2021, 03:39 PM   #1099
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I have a 2018 F83 completely stock with 437 wheels. OE tires are Continental Sport Contact 255/35 & 275/35. I will be looking to replace them soon and when I asked Discount Tire about the PS4S they said I couldn't get them because I currently have run-flats. This obviously can't be correct given so many of you have the PS4S. Any idea where they're coming from?

Also, would it be a good idea to move up to 265 & 285? What difference would it make?
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      06-10-2021, 10:28 PM   #1100
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Eyeing up a set of PS4S. Anticipated upsizing to 265/285-35R19 on my 437s as many in this thread have done. But the BMW Star OE version seems super cool and are side tracking me. The widths don't look right. Am I reading the specs correctly? tirerack lists tread width on the BMW Star PS4S rear 275s as only 8.9" where the front 255s are listed as 9" even. Still reading/searching through this thread to see if it was already discussed.
edit: Forgot that the G80 star spec 275 tire is a Front tire, and that tread width makes sense.. Still seems silly to call that a 275 tire.

Last edited by agentrnge; 06-10-2021 at 10:48 PM..
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