leeked

Yes, I think that's what I said...

ATX_Native

I was confirming it.

///Malcontent

There is now a Pilot Sport S 5. Note the letter-number reversal. However, it is being developed for OEM applications only. The aftermarket PS4S is still to be released.

jamesinger

I think there is some naming changes where they are going back to PSS5 instead of PS5S. I assume there will be a PS5 and a PSS5 eventually.
Also, in line @///Malcontent , the PSS5 will be OEM initially and then in time will most likely replace the PS4S. I just got PS4S and went down this rabbit hole before just getting recent date PS4S again because they are the best tires on a street car I have ever had regardless of the new new.

Here is a BMW story about the OEM use coming
https://www.bmwblog.com/2023/03/28/m...pss5-bmw-tire/

///Malcontent

All this is covered in the video I linked.

jamesinger

ah, sorry. I cannot watch videos at work without my students wanting to watch them with me, lol.

6sigma

My dealer installed N spec Pilot Sport 2 tires instead of PS 4S. I requested PS 4S tires and they charged me the 4S price, but installed PS 2 tires. I think they made a mistake in ordering the wrong tire, or maybe they were shipped the wrong tire. I'm OK with it though as the PS 2 is N spec (actually the sidewall says N2) and performs really well. They are very wide too - they look really good on the wheels and extend over the rim edge by about 1/2 inch. Front 235/35R19 and rears 305/30R19. I wonder if the extra width is part of the N spec?

Nate R

I got PS4s on my 09 4S. Love them. Also replaced the old factory TPMS sensors. Tire rack has some off brand ones that work great. Also like 10% the cost of the Porsche ones.

SpecialKay

I feel like my experience with Michelins is different than most others' and certainly different than many reviewers'. I just put four brand new Michelin Pilot Sport 4S tires (295/30 XL and 235/35 XL) on my 2009 C2S, replacing Bridgestones that had been on the car for too many years. I have about 1,000 miles on them at this point, and I'm not loving them. I live in the New York City metropolitan area, so road conditions are mixed -- some smooth highway, some fun secondary roads, some bumps and pot holes (carefully avoided!). Tire pressure ("cold" at 70F) starts at 40 psi (rears) and 34 psi (fronts). These pressures are pretty close to the recommended numbers for a partial load. At these tire temperatures/pressures, the tires feel nice -- responsive, not too much growl, good grip, and the car feels supple and planted. Just what I'd been hoping for.
However, once everything comes up to temperature, with the tires now reading 46psi (rears) 40 psi (fronts) from their temperature increase, the characteristics, as I perceive them, change significantly. The ride gets rough, the tire response is harsh, the noise level increases, and the car does not feel as planted and sure-footed. You know that feeling when the tires are overinflated? That slightly bouncy, chattering sensation where you feel every grain of dirt in the road? Yeah, that.
I'm considered the idea to let down some pressure, but I worry about starting out too soft and damaging the sidewalls. I mostly drive the car as a sprited GT and throw it around a bit on twisty secondary roads. At this point, I'm not comfortable pushing the tires hard -- I don't trust them and I don't have a place to push them where I'd have a safe run-off if things went sideways (literally).
So, with gratitude, I'm seeking the wisdom of the community. Does anyone else have experiences to share, good or bad?

Wayne Smith

It sounds like you've narrowed it down to pressure problems. That's a great start.

You can easily start cold with 5 psi less.

I've been told by people smarter than me that large pressure increases can be due to moisture in the tire. One of the reasons to fill with nitrogen.

Just thoughts. Please let us know how you progress.

leeked

I would agree with reducing your pressures a bit, I normally run 33 F/36 R and they usually settle around 36 F/39 R when they're up to temp. I'll then bump them up a few PSI if I'm planning a long trip to improve the mileage a bit, but it works well otherwise.

Rig.Stunts

Your 34 /40 is my sweet spot for the PS4S - HOT. This tire is very sensitive to pressure and is unbearably harsh over 40 psi

I'll see 4 psi increase on the street and 6 psi on the track.

30 / 36 cold is a reasonable cold setting

Take it easy until tires come up to temp . . .

Patrick E

[QUOTE=SpecialKay;18923763]I feel like my experience with Michelins is different than most others' and certainly different than many reviewers'. I just put four brand new Michelin Pilot Sport 4S tires (295/30 XL and 235/35 XL) on my 2009 C2S, replacing Bridgestones that had been on the car for too many years./QUOTE]

I too recently installed PS4S on my ‘06, replacing Bridgestones. I assumed I was going to love them based on reviews and forum posts. So far, I feel pretty “meh” about them. Not bad, but also not noticeably better than the Bridgestones. I also did a track weekend with them and was prettty underwhelmed. Definitely sensitive to pressure, but even in the 34-40 sweet spot noted above they were a bit disappointing. I think my expectations were just too high.

dmpslc

I wasn't totally sure about mine until I dropped the pressures down to 33/39 (hot). Much higher than that and they do feel a little more squirrelly/harsh. I have about 10k miles on them now and I have been overall very happy with them and no sidewall concerns even with some sketchy pavement. Definitely better than PZeros that were on it, can't comment about Bridgestones. The tricky part is keeping the low pressure dash light from coming on!

Liste-Renn

Another data point for you:
997 GTS, RWD
9 and 12 X 19 wheels with 245/35 and 325/30 MPS4S
About 2K miles on them (date codes are 2020)
Pressures are 32/39 cold, will increase to 37/44 under prolonged canyon carving in 80-100 deg heat.
I have never bled them off while hot- 'cause when they cool down the TPMS displays a low pressure code that cannot be cleared.
They don't seem harsh at 37/44, but I am not commuting on smooth roads at those pressures and don't really notice the ride as much as the grip.

They are noticeably better tires than the Bridgestone or Mich PSS that I ran prior.
Far quieter than the RE-71, better grip than the the Super Sports and wet performance is superior to either of them, by far.