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YOUR RESEARCHN spec tire rating
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Install on their cars
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Therefore Porsche only allows these certain tires to be installed on their cars.
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I laughed out loud when my local stealership gave me the disapproving stare for having tires fitted without the N rating.
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Suggestion
That statement is not meant to change the topic and preach/lecture you on doing 90mph on curvy public roads.
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So here's the deal . . . .I am about to buy tires for my 986S that do not have an N spec rating for the side walls. The tire shop I have chosen has mentioned that I would have to sign a waiver in order to purchase these tires. Apparently, after further discussion this waiver is simply a hand written document that states the shop has mentioned these tires are not N spec tires and clears the shop from any liability. The shop is not being pushy about it, but just saying they need to do it. What I don't understand is why they have to clear their liability for a tire that is DOT approved.
Simply put, the N spec sidewall rating that Porsche has devised is essentially only given to a couple of tire manufacturers who have worked with Porsche through R&D. Therefore Porsche only allows these certain tires to be installed on their cars. Tirerack has an explanation posted on their website.
Bottom line, does anyone see any issues with siging a waiver to have non-N spec tires that are DOT approved installed?
Thanks,
CSbox03s
I laughed out loud when my local stealership gave me the disapproving stare for having tires fitted without the N rating.
Ordered tires from Tirerack and had my local indy Porsche shop fit and balance them - saved a fortune and very happy with the tires.
Here we go again.............
buy N tires and forget about it. You are hampering the handling capabilities of the car if you dont buy N spec.
Just read the load ratings between an N spec and a non-N for the same exact tire.
BIG difference!
True, cdodkin but imagine this.
I was doing 90 MPH around a turn. Bored that the car was not at its limit, I decided to whip the wheel harder to disrupt the rear.
Boy, was I in for it! The rear started to come around and the tires were howling really loud. I almost **** myself.
It recovered (not as quickly as I wanted being used to forward engined cars) and I understood what the rear weight could do like the classic 911's when the rear comes out.
So, in that instance, I could of put the car in the guardrail at 90 MPH if I would of had non-N spec tires. Every little bit counts in safety
Jus' sayin'...............
Hmm. This has always been an interesting debate for me to read about. Me personally, I have driven 996's with and without N spec tires (PS2's to be precise) and felt that the non N spec tires actually handled better. Granted the cars where set up differently, as mine (the one with non N spec tires) had a more aggressive alignment and both cars had modded suspension 1 with x74, GT3 bars and one with PSS9s, GT3 bars and control arms (mine). Overall grip in that autocross, mine felt better. I understand that my car had slightly wider tires and a better alignment which could contribute to the better grip but I wouldn't say that N spec tires will be the difference to loosing it or saving yourself in a drift. In fact, I found that feed back was just as good as was turn-in even though the N Spec tires have stiffer sidewalls.
Perhaps at the track the difference is more noticeable?
In one of my Porsche books, they discussed N-spec and gave the rear weight bias as being the main factor here. i.e. most cars don't have 60% of their weight over the rear tires and thus the side walls have to be stiffened to support the extra weight.
This sort of driving should be done at a track. That statement is not meant to change the topic and preach/lecture you on doing 90mph on curvy public roads. Instead, the point is that most, if not all, high-performance tires, if driven sensibility/normal on the street, will yield similar performance; therefore, the difference/benefits between an N-rated tire and the non-N-rated flavor may not be realized.
In other words, don't try to swing the rear out on the street and you'll have no problems.
///Michael
Having said all that, I have alot of miles and time to make my decision, but I'm leaning towards staying w/ N-rated tires. Even more so if the price difference is negligible.
Here's an article explaining N-spec. The answer to your question will be pretty clear. IMO.
I won't be a party to more popcorn eating.
http://www.tirerack.com/tires/tirete...currentpage=38
