VVG

When I bought my Spyder in 2020, there was no option to spec the car with Michelin Pilot Sport 4S tires. It was only the Sport Cup 2. While it is certainly a brilliant tire for dry track conditions, that is the only situation in which it is a brilliant tire. As a road tire, even one for spirited mountain/canyon driving, it is simply too compromised. My PSC2 lasted over 8000 miles including a smattering of track days. Better than I would have thought. The fronts had some life left, but the rears were down to the wear bars.

After some miles on the PS4S, in both wet and dry road conditions, through mountain passes and highway driving, I will say that it is a much better road tire. For speeds that one will see even on hard spirited back road driving, there is absolutely no discernible difference in grip, steering response, or chassis feel. I suspect these will only be detectable at a track when driven close to the limits. The PS4S rides better, makes less noise, and the difference in wet weather performance is night and day. Grip is substantially better, but more so is one's ability to tell the level of adhesion. On wet road surfaces, I always found that with PSC2, it was very difficult to tell where you were with regards to your adhesion. To me, this felt scary.

I highly recommend switching to the PS4S if your car is primarily road driven. Don't kid yourself. You will enjoy the car much more overall.

Avera

Nice write-up OP

The PS4S tires are fantastic

I find the Cup2s perfectly fine, but I will definitely switch over to PS4S when the time comes for new tires (I am not a tracker)

I think I heard Michelin came out, or will soon be coming out, with the next version of the PS4S?

If true, did you happen to get the most recent iteration of the PS4S?

Avera

NCheok

PS5S ... It's expected to be imminently released including in N1 Porsche specs. Sensing a little delay here with Ukraine War.

PS4S will become obsolete.

Avera

Please remind me, what is an N1 Porsche spec?

Alan C.

I used a set of MPS4S on my 16 GT4 and preferred them for mountain driving and switched to them on my 22 GT4 as well. Zero complaints.

Zeus993

Yep. Alpins on first for the winter season, then back to my favorite PS4S's!

GrantG

The N rating indicates a bespoke tire made to Porsche's spec. The number (begins with 0 indicates the generation of that tire in that size - you cannot compare generations of different size). While N rating does mean Porsche certified, it is not necessarily certified for a particular model, so try to confirm that first.

Avera

Thank you sir

rost12

I understand that for fronts, you can get PS4S with N rating, but for rears in the correct size no N rating is available. At least that’s the case for the UK market.

I’m giving it a try, but would be nice to be N rated for warranty/peace of mind.

kk2

There’s always something new or better around the corner. No one is missing out by buying ps4s.

colnagoG60

I wouldn't mix. Given the (2) compounds used to create the tread of a generic PS4S, vs. the upwards of (6) compounds on the BMW, one may be really mismatched. As far as N spec rears, this is mine, stateside:

Avera

Not sure if it is off-topic, but I first appreciated that not all performance tires are created equal when I lost the tire lottery with my G80C . . . BMW gives you no choice in whether the car is delivered with PS4S or P-Zeros, and mine came with P-Zeros.

P-Zeros seemed perfectly fine in dry conditions, but horrendous with any precipitation on the road. Even the Cup2s seem much better than the P-Zeros in wet conditions.

Comparing GT4 to G80C is not apples to apples, I realize, but I think there is good reason why the PS4S tires are so popular.

Just out of curiosity, does the GT4 handle 255 Cup2/PS4S up front without issue?

Avera

Dyim

Are you talking stock wheels?

If you change wheels, lots of options.

An example here:

https://support.apexraceparts.com/hc...-Fitment-Guide

Avera

Yes, stock wheels . . . not interested in aftermarket options.

I may have wrongly assumed the stock wheels would accommodate 255 tires . . . was more inquiring about fender well rub, etc

Thank you

Avera

Dyim

With the way the GT cars came set up from the factory, most of us don’t increase tire width on stock wheels. I would think clearance is on the tight side.

Not a common topic that I see discussed on here anyways.

If anything, people go down a wheel size for dedicated track wheels here. The opposite of what you normally see say on bimmerpost where people discuss bigger wheel/ tire/ lowering suspension/ fender roll etc.