Buy Continental Sport Contact 2 (Porsche N2) 255/40 R17 Z (94) for the back of the car.
Having had 2 sets of Pirelli P Zero Rosso (Porsche N3) 255/40 R17 Z (94) and being slighlty disappointed when damp weather grip goes when the tyres are only half worn , decided for a change.
Michelin PS2 temporarily unavailable so i went for the Contis as
1. Porsche wouldnt approve a specific tire if it was poor ;
2. BLACKCIRCLES.COM had them as their "recommended" tyre for this size.
3. The ordinary [not N2] tyre got good good reports for wet weather grip , tho some people didnt like it much.
First corner that i tackled aggressively on a road i use often , was 70mph uphill bend with a few bumps- i could feel the rears squirming ,,corkscrewing about.
Worst moment was when turning into a tightening radius slip road off a 80mph straight and the backend felt so unstable i thought it was going to breakaway.
Another unpleasant moment on a fast downhill dual carriageway doing about 90mph under a constant throttle on a long bend , and again the rear starts moving around. I had taken this bend often before at faster speeds and never thought i was anywhere near the limits of the Pirellis.
All this on a single drive on a warm dry road.
I have never driven a 911 , but suspect this is what old ones feel like.
So have decided to bite the bullet , dump the tyres and reorder the P-zeros which are always incredibly stable.