acey81

So I am discussing my 991.2 order with my dealer and I asked if we could find a solution where the car could be delivered with N-rated Cup 2 tires on the car upon delivery. Obviously this is not possible from factory, but the 991.2 GTS has the same dimensions as the 991.2 GT3 so the N1 tires should be a straight fit.

However the dealer claims that the tires are not approved for the regular 911s and that fitting the Cup 2 tire would void the warranty. My question is a) why and b) what kind of claims could be denied? And has anyone experienced any problems with using other than stock tires?

Needsdecaf

As my grandfather would say, your dealer is so full of ****!t that his eyes are brown.

First of all, you are talking about N rated tires.

Second, even if you don't run N rated tires, it doesn't void the warranty. Period.

erko1905

You can run whatever tire you want.

But after that conversation I'd suggest not buying it from that dealer.

skiahh

This. The fact that your dealer is already trying to weasel out of warranty coverage is beyond alarming!

[edit] I see that you're in Sweden, and no doubt your laws are different there, so maybe your dealer isn't shady. Looks like you have some research to do on what is and isn't true there!

acey81

Thanks for the feedback!

Consumer law / rights are very strong in Sweden, so unless it is stated somewhere that it is forbidden to run anything else than the factory supplied P Zeros I should be fine. However, I know that on the 981 Caymans, R-rated compounds were not allowed due to the fact that higher cornering forces could cause oil starvation. I haven't seen / heard / read anything about the 991 having the same issues.

Will not be buying from the dealer, that is for sure.

NoGaBiker

Well, my Cayman GT4 was delivered from the factory with Sport Cup 2s, and it essentially runs the 3.8 Carrera S motor. I'm not aware of any beefing up of the oil baffles in the GT4 9A1 (I've specifically searched for any info to that effect before), so it seems likely to not be a problem in the GTS. Unless, of course, the 9A2 is much wimpier, as we all secretly know in our hearts anyway.

amet

I was told that in Middle East only P zero is allowed on 991.1, I mentioned that Michelin is N rated and got the mouthful back that it will void the warranty as it puts more force on the wheel bearing.

Ira Blumberg

Porsche has announced that the P-Zero Corsa is approved for the GTS and is a dealer option. This tire is supposed to be street legal track tire like the Cup 2. Thus, you could probably get your dealer to mount the Corsa tire without a fight. Of course this also suggests that the Cup 2 should work fine on the GTS since it would likely have very similar performance to the Corsa.

erko1905

I do understand different countries and different dealers might be doing things differently. I would also understand that it'd be a grayer area if you were considering non-street legal racing slicks.

However, I'm fairly confident that if the tire you are running is street legal, and a dealer is unwilling to entertain a warranty claim due to your running a different type/brand tire, you will have legal recourse. Obviously that assumes some sort of functional legal system in that country.

aggie57

Warranty is funded and defined by the in country distributor. What applies in the US has zero relevance in Sweden. Ask your local distributor.

acey81

It seems to be one of those things where you have to just do it and then deal with potential problems later. In theory Porsche could try and get out of any claim relating to suspension / hubs and drivetrain due to non recommended tires.

I will keep you posted if anything goes wrong!

randr

Porsche do make statements in relation to slicks and the impact of high cornering G forces on cars that do not have a true full dry sump. MPSC2 and Corsas are not slicks.

In the manual it states "Basically, only tyres of the same make and with the same specification number (e.g. "N0", "N1" etc) can be fitted. Under "Before driving on race circuits" it states "do not fit racing tyres. Racing tyres are not approved by Porsche"

R_Rated

Red Flags like crazy but keep in mind the OP is in Sweden and different warranty t&c than USA.

randr

^^^^agreed its hard to see how a road legal tyre (MPSC2), as long as of correct size and fitment could void a warranty.

R_Rated

I'm sure there are as many variances as many countries but a race tire in cold climates isn't ideal. I don't know but imagine if I was running Alaska - I'd want strong warnings and waiver from cars with max performance summer tires but the republican in me says if you wreck it its on you and insurance shouldn't have to cover.