964X33

Time to retire the old SO2As. I am looking to go with Michelin Pilot Super Sports but need some advice pse.

I am running RUF Speedline 18s, 10J and 8.5J. Currently using 285/30 and 225/40. Car is not a DD but does do occasional track service.

The options in MPSS are (size, rim reqt, (design rim size), rotations per mile):

275/35/18 9-11" (9.5") 814RPM
285/35/18 9.5-11" (10") 804RPM

225/40/18 7.5-9" (8") 829RPM - have option of 88Y and 91Y
225/45/18 7-8.5" (7.5") 802RPM
235/40/18 8-9.5 (8.5") 819RPM

So my questions are:
1. Does anyone have any advice on the different rolling diameters if I went for the 285/35, 225/40 option above? Should I definitely go with the 225/45 not the 225/40?

2. Would you go for the stronger heavier 91Y or the lighter 88Y rating in the 225 if opting for 225/40?

3. Anyone running 235s experiencing any rubbing on an RS height car? How would 235s affect handling?

4. Anyone got any thoughts on alternative tire brands for the use mentioned (I still want absolute confidence in the wet).

Thanks in advance.

AC/911's

295's & 245's

ralt

I had 275/30s. wore them out and replaced with 285/35s which are more expensive. I will go back to 275/30 s when these go. Unless you are in it just for looks, you wont get any performance difference unless you are Lewis H. the 275s 'felt' better than the larger 285s. I feel sidewall movement. At least thats what I think it is. I am sure someone will disagree but the car doesnt feel as 'snug' with these current tires on rear. As to fronts, 225s already rub on turning so I am happy to stay where I am. I know people are doing 235s but dont know how with out major rubbing on the front fender liner

Metal Guru

I run 235's up front with my car at RS height and have no rubbing. The caveat is that I have 5 mm spacers and rolled fender lips. At full lock when backing up the tire that's on the inside of the turn touches the very outer part of the wheelhouse (the little removable piece) lightly.
I run 295's in the rear and I have no complaints.

MeanMachine

295/35/18 ?

Metal Guru

295-30-18's.

urquattro20Vt

Not sure what advice I can really give but I have the Super Sports on my car - 225/40 up front and 285/35 in back - would prefer 295/30 but as you know it's not an option.

I actually like the beefy look in back with the 285/35 - but don't like the even taller gearing it provides - not that I can really notice it - it's just that I know. I probably does make the speedo dead on accurate, tho, instead of the typical conservative. The bigger sidewall also adds a smidge of compliance - another plus IMO considering roads here suck now.

jim dorociak

I just bought PS2's - I went with 225/40 and 285/30 as they are almost the same height, I am sure our new Porsche friend will identify himself when he is ready. Rated N3 and N4 just for Porsche because SS were not available in the sizes he wanted. jdorociak@gmail.com Jim

964X33

Thanks for all the views on tyres earlier in the week. Nobody commented on 89y or 92y option for the 225s. Do you go stronger or lighter or it doesn't make any difference so go cheaper?

brad@tirerack.com

On an 8.5" wheel the 225/40 is the best choice. 235/40 can be also. Either load rating would likely be OK, the car isn't that heavy. More load capacity would come with the 92 load index.