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YOUR RESEARCHGetting non NO rated Pilot Sport 4S tires installed - end of world?
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Check 996 tires and out of two sets
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I checked my 996 tires and out of two sets with 4 different sizes of tires, only 2 have the N2 rating.
Getting non NO rated Pilot Sport 4S tires installed - end of world?
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Suggestion
The people who say that Porsche knows best must not have heard about the 10,000 oil change interval or the IMS bearing, right?
Getting non NO rated Pilot Sport 4S tires installed - end of world?
Run mix of 18" and 19" wheels
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Getting non NO rated Pilot Sport 4S tires installed - end of world?
Run n rated tires
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Suggestion
For the 992 GT3 RS with 1800 lbs of downforce, yeah I'll be running N rated tires.
Getting non NO rated Pilot Sport 4S tires installed - end of world?
Run whatever you want
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Suggestion
Cars aren't under warranty, run whatever you want.
Getting non NO rated Pilot Sport 4S tires installed - end of world?
Test track in real situations
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What you're assured of with the N rating is that Porsche has tested it and it meets their requirements, not just on paper but at the test track in real situations.
Getting non NO rated Pilot Sport 4S tires installed - end of world?
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I ordered Costco tires to fit OEM size on 1999 996 C2 with 18" rims. Website let me order, but when I got there, they said they technically shouldn't install them as not NO rated tires but if they did, they couldn't accept responsibility for what may happen. I agreed to move forward, as they could only find Cup tires with an N3 rating.
I've read the internets and there seems to be a huge flow of opinions of non NO or NO only. But I haven't found a definitive source that says why it does or doesn't matter. Some say NO tires are made differently. Or NO tires have different treads. But I'm having a hard time even finding how to find these tires online in NO rating.
So, are there more opinions on if I've a bad decision or should just drive speed limit for next few years?
There have been lots of threads about this but I'd love to see the responses in 2023. Personally, I've used both N rated michelin tires and non-N-rated michelin tires and didn't notice a difference.
Pure conjecture: It's mostly, if not all, marketing. With porsches they try to sell you "N0" tires. With audis, they try to sell you "A0" tires (regardless if your car is front or mid engine). With ferrari they try to sell you "K0" tires. The people who say that Porsche knows best must not have heard about the 10,000 oil change interval or the IMS bearing, right? I wonder which track tires have an N-rating. Those guys drive pretty fast. The whole thing seems bogus to me but I would still buy N-rated tires if they were available. Seems like the difference between brands/compounds/tread patterns must be greater than the difference between a MPS4S and an N rated MPS4S.
Cars aren't under warranty, run whatever you want. For the 992 GT3 RS with 1800 lbs of downforce, yeah I'll be running N rated tires. For my 996's I don't think it matters much.
Not entirely marketing, watched a Porsche video about 13 years ago on the process behind giving the tire the N rating. What you're assured of with the N rating is that Porsche has tested it and it meets their requirements, not just on paper but at the test track in real situations.
Bottom line, you can get a tire without the N rating and it might be better than anything you've ever used...
I am interested in learning more about this but it seems to be shrouded in secrecy. Overload of misinformation on the internet and hardly anything official that I can find. I think what you are saying makes the most sense. That the tires (make, model, and size) have been tested and approved by Porsche.
What I think is unbelievable is that there are physical differences between the tires other than the markings on the mold. It would require Michelin, for example, to have dozens of different production lines, or at least processes that they swap out for all the different manufacturers and in Porsche's case the individual models. Just doesn't make sense to me. But I would believe it if there were info from an official source.
don't be skeptical. It's a real thing. I was at Easton PA training center and asked Michelin and Porsche reps. The tires are made differently using different materials. With that said is it going to matter on a 996 that sees rain and street time? I'm no engineer but probably not.
Call PCA and they can probably provide the official Porsche answer for you.
don't be skeptical. I was at Easton PA training center and asked Michelin and Porsche reps. The tires are made differently using different materials. With that said is it going to matter on a 996 that sees rain and street time? I'm no engineer but probably not.
Well, I thought the same thing, but I heard it from the "horses mouth" that they are indeed "different". I was at the New Product Launch of the Cayman and there was a Top Level Michelin representative there and he explained the "N" spec vs ":non-N" spec and said there IS a difference...( for better or worse (?)) .
It's not about "marketing" it about "contracts".....and yes the contracts are long and somewhat complicated.
To put it simply ( not that it will end the debate) , if the tires are "exactly" the same it will be just another "N" spec tire and no reason not have the "N" on the tire, but if the tire is not "exactly" the same ( albeit rubber composition or tread or sidewall design or anything else) then it doesn't and cannot get the "N" spec unless a new "contract" is issued and it will get a new successive designation ie "N1" N2" "N3" ect....
Very interesting. So, in practice, what this means is manufacturers go to tire companies and say, "we like X model of tire but we want it more of characteristic Y"? For example luxury carmakers could ask for extra noise cancelling? I think the question I would ask the tire manufacturers if I could is how different tires of the exact same model can really be.
I was curious so I went to the garage to check. Currently my rear tires are N3 MPS4S 295/30ZR
18
and my front tires are MPS4S 225/40ZR18 and have a "CR" where the other tire shows "N3" which doesn't seem to be any type of designation.
At least in terms of sidewall (look) and tread pattern that should be pretty easy to determine if there's a difference by just comparing an N spec and a non-N tire. i've got the non-N spec anyone have the N0 PS4 ?
Im also curious if there even is an N-spec PS4 in my size:
225/40 18
265/35 18
The guy at costco tried very hard to find one in the computer.
What usually happens as in the case of the 996 is that the car manufacturer goes to a tire manufacturer and says "we are developing a new model and want it to have better performance than the previous model and we have improved all aspects of the car and want to improve the tire contact patch for more performance, but no larger tire currently exists...so we will work with you on a wider tire to improve performance and promise to buy x number of tires for production..and they enter into a "contract" ". same with Michelin, Pirelli, and Continental ect..
In the Free World , Michelin Pirelli Continental and all other tire makers are free to make any tires they want, but they would not be making a larger tire if there were not someone willing to buy them ( ie. contract) or a car that "Needed" them..so as more cars are on the road and in the "wild" there are more tires available that are not part of a " contract" and " are free not to adhere to specifications"..
This got me to thinking about N rating.
I checked my 996 tires and out of two sets with 4 different sizes of tires, only 2 have the N2 rating.
My 295/30ZR18 have N2 on them.
Then I found this link:
https://www.porschespokane.com/porsc...res-explained/
I noticed that the Michelins I put on my Honda Odyssey were listed and I remembered that they were listed as "Porsche tires" when I bought them.
Yep, my Honda’s tires are Porsche approved:
But of course I have summer performance tires on my Honda.
My wife used to drive it!
It also has a big brake kit and a tune.
Its probably not a stretch to imagine a different rubber compound for a 911 just because of wear, or the desire to pick up a point on the skid pad..
Kinda like the DOT bfg tires years ago that had camber built in so that solid axle cars could corner better.. the camber ones had a "C##" number that indicated camber in degrees..
