Indeed, not debating the ps4s has probably the best all round characteristics and obviously suit your car and driving style, but for the OP going from a 2.0 on run flats I am making the assumption he is using the car in possibly a more average style hence saying choose which characteristics are more important to you.. if he drives a z4m or 35is in all weathers with heavy foot then of course the characteristics you would seek would most likely be those of the ps4sR.E92 wrote: ↑Fri Feb 19, 2021 11:37 amSome aspects of a tyre require hard driving to notice but simple things like straight line grip are quite apparent in normal driving and not just track use. The reason I wouldn't deviate from the PS4S is that it just sticks when taking off.mr.tourette wrote: ↑Fri Feb 19, 2021 10:36 am Truth is if you look at the summer tyre reviews on Autocar or the like and pick a tyre from the top 10 you are not going to get a bad tyre, they just all have slightly different characteristics and how they feel to each of us is slightly different, most of these tests are testing the performance at nine or ten tenths by accomplished drivers that are capable of pushing them very hard.. chances are you will never get to those levels on a track day let alone the road and any of the tyres tested, even those finishing bottom of the pile, will be more than adequate for the average driver.
The ps4 will be perfectly fine for you, but if cash isn't a concern then you would do better with the ps4s, want the quietest tyre get the Dunlop RT2, want great value/performance combo, hard to beat Vredestein Ultrac Vorti, want a set of runflats that are actually good, the new Pirellis.
Goodyear F1 Assymetric 5s felt like the best tyre I had ever used wet or dry but they were so noisy i hated them but couldn't fault their performance.
So pick on the characteristics you think are important to you and dive in, and remember its easy to get hung up on whats best but at the price point you are looking at theres no bad tyres.. just slightly different
On a warm dry day I can spin the wheels up in the first 2 gears if pushing too hard but with warmth in the tyres and a rolling on the power I can get traction all the way through 3rd gear which is impressive given the power output.
I've tried Goodyear Eagle F1 Assymetric 3, Vredestein Ultrac Sessanta and Avon ZZ3 on the Z4 and all of them were capable of spinning in 4th or even 5th (I think the Avons even span in 7th if it was damp). The only other tyre that matched the PS4S was the Michelin Pilot Super Sport which is just the previous version of the PS4S anyway.
For wet grip the PS4S is by far the best out of all I've had on the car. Other aspects like noise, wear rate and comfort come further down the priority list but it excels in those areas too. There's a reason the tyre wins everything and is a staple for OE spec on high performance cars.
of course for many of us there are other considerations other than outright performance 
