1198r

mdrums

So you think the B'stone RE11 is as good or better than the Toyo R888 as far as grip and heat cycle longevity?

buckwheat987

Great info in this thread. Keep it coming.

1198r

those that like the bridgestones - would you have these in preference to new Michelin Super Sports?

DLJ

+1

1198r

OK, for the gen 2 RS guys, I have done some research on sizes of RE-11, MPSC and new SS (I am doing this excluding Pirelli as my Trofeo fault has made me lose faith).

Bridgestone:
RE11 sizes - 245-35-19 will go on rim width 8.0" to 9.5"
RE11 sizes - 305-30-19 10.5" to 11.5"

Michelin:
MPSC sizes 245-35-19 rims 8" to 9.5"
MPSC sizes 305-30-19 rims 10.5 - 11.5"
MPSC sizes 325-30-19 rims 11" - 12"

SS sizes 245-35-19 rims 8" to 9.5"
SS sizes 305-30-19 rims 10.5 - 11.5"
SS sizes 325-30-19 NOT MADE (YET!!!!!)

Interestingly, see attached link for new SS, which clearly shows picture of gen 2 RS - which begs the question - what size rear tyre and therefore rim size?

http://www.michelinman.com/tire-sele...r-sport-tires?


Questions:
1. Any gen 2 RS owners fitted RE-11 305 rears?
2. If we know a new MSS 305 has gone on a new gen 2 RS, given the info above, can we assume an RE-11 can too?
3. The Gen 2 rear rim is 12" (I think), is the 305 rear being stretched? Is the 1/2" making that much difference?
4. I fitted a 305 Trofeo (because the 325 rubbed), which failed - did it fail because it was stretched? An important question for the safety of us all thinking about the 305 rear I think.

If anyone else has more data to add please do as I have not considered actual tyre width in mm on rim. It would be good to know the differences here in mm.

Larry Cable

how are you liking yours?

lawjdc

No problems with 305's on 12" rims. No "stretching" involved. Thats the tire size that comes on the non-RS GT3's from the factory.

kaamacat

Logic says that because the GT3 and GT3RS (GenII) share the same wheel dimensions, accept for the offsets.........that a GT3 set will work on the RS. (But thats logic).

I don't think we've seen posted on any of the Porsche forum sites where someone has actually purchased alternate sizes for the RS on the standard RS wheels. (One other item to consider, the "narrower" tires may look a tad strange on the larger bodied RS.......if that matters).

CRex

Look closely at this picture from Mich's site. The rear wheels ARE stretched, in the same way Gen 1 RS tires look stretched in the rear (no surprise, those were 305s on 12" rims as well).

See the rounded, bubble like appearance of the sidewall?

That said, I personally think it's just a matter of preference--car gets even tail happier with 245s up front and thin 305s in the rear. Me, I'll wait for the 325s.

Targa Tim

I'll wait for 325 as well. It's like buying a pair of jeans. If I'm a 34, then a 32 or 36 probably will also fit. But why do I need to compromise, I want the best fit.

It doesn't make sense that PSS doesn't come in 325, as all .2RS and GT2 will need it, then there is the new 4.0. There is lots of business there already. And they care to make the 20" for the Ferrari 599. I don't understand what Michelin is thinking. I hope they read this forum.

Larry Cable

I have been communicating with Michelin since last November on the issue of the 325/30-19 fitment for the various RSen ... since this is a purely Porsche fitment (according to Michelin) the decision to provide a homologated (N-spec) fitment is primarily with Porsche not Michelin as such a development would require both Porsche and Michelin development resources to homologate.

Futher Porsche appear to believe that the GT cars warrant a (DOT R) tyre such as the MPSC(+).

AFAIK there will be no new MPSS fitments, apart from those announced at the launch, for this calendar year. Also note that the total addressable market for such a fitment in the US is probably only in the order of 600 cars or 1200 tyres.

I note that the addressable Ferarri market is probably a LOT smaller than that, but in this case Ferarri decided to launch the 599 and 458 on the MPSS.

My personal guess is we will not see an N-spec MPSS until the launch of the 991 generation cars since Porsche will need an N-spec tyre for the car from Michelin (as well as a Pirelli and/or Continental alternative) and the PS2 is superceded by the MPSS.

In short, you may have to wait a LONG time for that 325 fitment.

kaamacat

Don't some of the Corvette rears use that 19" also. (Z06's).......... although their 18" fronts may have a combination. Don't remember what year though, but think it was the latest C6 series. (345's that is)

And LarryCable.... thank you very much for the updates.

Larry Cable

I thought so too ... although the (new) vette fitments are I think are ZP 9runflats) ...

Larry Cable

factory rims with the 305 mounted...