First use date of Pirelli CN36 185 70 VR speed rating on longhoods before used in RS

[911MRP]

Cheers Dave

you have way more kardex resource than me but usesful to know it is too general info.

Not sure where this Info will be dug out — roadtests when new are obvious source because it is something journalists note in handling Section and was evident from tyrewall but with Dunlop and Michelin being common a bit of a train spotting exercise To fond pirlelli.

Pirelli publication is more aftermarket than OEM but like the veith one I have photographed that flag it as “in preparation” so rather a big clue on availability — evidently a product development milestone in CN36 range deemed worthy of noting in that booklet. So we know it wasn’t by then launched by the Pirelli German subsidiary that were supplying Porsche. factory.

Maybe low mileage survivors cars might give a few pointers but that is difficult as even on them tyres degrade and are replaced ... maybe a few Never used spares with three digit dot code still out there though?

Also COA probably not specific about type of Pirelli Fitted even if often woeful COA data can be trusted.

Not sure it requires a vast number of data points in my mind the in preparation comment along with the R&T along few others is fairly clear it was cinturato 72 at least until MY ..probably not until MY 73 unless hard proof emerges to contrary.

Frere says this about cn36 superseding the previous base model configuration DiringbG series — so after RS use of cn36:

It does not say it was the first use of cn36 but Fere’s comments certainly highlight the adoption of CN36 with the G series which tallies with David’s personal recollection of tyre evolution on his long term owned 73 targa in the other thread.

As mentioned elsewhere the first objective evidence of cn36 I’ve found is in spring 73 roadtest of the UK importer’s press 911T demonstrator.

Thanks Russ. Generally the tyre types evolution is not something well documented on one thread here — crops up in various ways - possibly because unlike less consequential but massively chronicled things like toolkit tyres are lifed by wear or age; never less are a authenticity point for folks who care about such historical matters.


Steve