Do i need N rated tyres?

[m3jappa]

Cayenne is now out of warranty, need some new tyres and theres a 15% off deal on some p zeros.

However....

N rated are something like 270 each and non n rated are 220each iirc. both p zero. one is n rated the other isn't.

Whats the actual difference?

Can i just get the regular ones? i think it works out to £750 for 4 new p zeros which sounds bloody good to me!

[Ohio7274]

If you’re no longer running warranty I’d say you’re free to run whatever tyres you like and ignore the n rated bks.

[Sport_Turismo_GTS]

The n-rated thing certainly isn’t bks, but out of warranty you are free to put on whatever tyres you choose. As long as they are the correct size etc, then there are no issues.

[Trevor555]

Do "used approved" Porsches need to have N rated tyres to be retailed?

[m3jappa]

What i cant determine is if there is actually any difference.

For example there are multiple p zeros listed all at different prices. merc, audi, Porsche approved. All different costs but on the face of it the same tyre.

I did read as well somewhere people saying insurance wouldn't pay out of not porsche approved tyres, is that true? i could partly believe it tbh.

[descentia]

m3jappa said:

What i cant determine is if there is actually any difference.

For example there are multiple p zeros listed all at different prices. merc, audi, Porsche approved. All different costs but on the face of it the same tyre.

I did read as well somewhere people saying insurance wouldn't pay out of not porsche approved tyres, is that true? i could partly believe it tbh.

https://www.caymanoc.com/old-home/records/porsche-myths-busted-car-insurance-n-rated-tyres-r62/

[LemonTart]

Last year I needed some new rear tyres on my GT3. I wanted PS4S rather than Cup 2 as I only really use it for road trips and very occasional track day.

The car was scheduled to have its geo realligned at Center Gravity so I asked Chris this very question he said if its out of warranty non N rated were fine so that was good enough for me.

Chris took the wheels off, tyres were fitted by a company on the same estate then Chris refitted and sorted the geo adjustment - very happy with both the service and results.

[Orangecurry]

Oh why not.

m3jappa said:

What i cant determine is if there is actually any difference.

For example there are multiple p zeros listed all at different prices. merc, audi, Porsche approved. All different costs but on the face of it the same tyre.

There are probably some physical differences, but nobody knows why the manufacturers won't specify what they are. It beggars belief how stupid this is. As if some Chinese copycat tyre manufacture are going to knock out BMW * copies that everyone will rush to buy.....

BUT - you will never ever ever ever be able to tell what that difference is as a functional part of your Cayenne..

m3jappa said:

I did read as well somewhere people saying insurance wouldn't pay out of not porsche approved tyres, is that true? i could partly believe it tbh.

N-rating is not and never was of any interest to any insurance company, ever. Only Service Managers at OPCs would intimate it to customers so as to boost sales.

IMO buy the best tyre you can afford in the market today. Here is a good place to look at factual unbiased functional comparisons.

https://www.tyrereviews.com/

Here's one specially for your car

https://www.tyrereviews.com/Article/2021-Tyre-Revi...

[Orangecurry]

Just to check OP - you do know how important Load Index and Speed Rating are?

[m3jappa]

Orangecurry said:

Just to check OP - you do know how important Load Index and Speed Rating are?

Yes.

There are 3 types of p zeros listed

all 3 are y rated

one is 103 and the others are 107. the non n rated is 107

Thanks for the previous info as well, i will go and have a look and see what else there is. I just want a non budget decent tyre for reasonable money. As its not a 'fun' car im not mega fussed. Just dont want to turn it into a jelly on wheels

Edited by m3jappa on Monday 22 May 22:08

[Orangecurry]

m3jappa said:

Thanks for the previous info as well, i will go and have a look and see what else there is. I just want a non budget decent tyre for reasonable money. As its not a 'fun' car im not mega fussed. Just dont want to turn it into a jelly on wheels

Ah well that's a different question - sidewall rigidity varies quite widely - look for this in SUV-specific reviews. Car Bridgestones for example usually have harder sidewalls than most - Uniroyal Rainsport (at least used to be) one of the softest.... Good luck.

[deutsche.diagnostics]

I would do a bit more research.

Both BMW and Land Rover owners have had issues with using the non marque rated tyres on their AWD cars. Judder on turning slowly and one of them had some serious transfer case issues.
I think Merc had issues too on their RHD GLCs, that was with MO tyres too, they had to fit customer cars with winter tyres and then change the compound of the MO tyres for RHD cars.


BMW were refusing warranty claims for non star rated tyres fitted as they had so many issues when 'some' tyres were fitted to xdrive cars. So just easier to say warranty refused on transfer case replacements if not the approved tyre fitted.

Probably fine, but maybe search for more info?

[the-norseman]

I had slow speed judder on my 981 Cayman S with N tyres on.

[boitjie]

the-norseman said:

I had slow speed judder on my 981 Cayman S with N tyres on.

That's the Ackerman effect. Happens on all Boxster/Cayman to some extent. Temperature and tyre type seem to effect how prevalent it is.

[boitjie]

Trevor555 said:

Do "used approved" Porsches need to have N rated tyres to be retailed?

Yes

[SV_WDC]

All tyres carry speed ratings & it is my understanding that all N tyres carry the speed rating that's suitable for the vehicle.

https://www.which.co.uk/reviews/new-and-used-cars/...

So can you run non-N? Probably. But will they be rated to the performance of the car? Have to check.

[TameRacingDriver]

Sounds like just another way of fleecing more money out of Porsche owners to me. Personally I wouldn't bother. Just buy decent tyres to begin with.

[freedman]

SV_WDC said:

All tyres carry speed ratings & it is my understanding that all N tyres carry the speed rating that's suitable for the vehicle.

https://www.which.co.uk/reviews/new-and-used-cars/...

So can you run non-N? Probably. But will they be rated to the performance of the car? Have to check.

Probably?

Of course you can run non N rated, and there will be no difference in the speed rating

Different of course if you have or wish to warranty the car, then you will need them

[Trevor555]

boitjie said:

Trevor555 said:

Do "used approved" Porsches need to have N rated tyres to be retailed?

Yes

If that's the case then OP needs to decide if he'll ever want to sell it to an OPC.

And if he does they will want to reduce the purchase price by a set of tyres.

[jimbo761]

The one negative of Porsche ownership for me was to retain warranty you are forced to use N-rated tyres, which in my case are either the god awful Pirellis it came with or the Good Years which are a huge improvement on the Pirellis but I'm not allowed Michelin (18"s) as no n rated options.

It's very restrictive, but if you're free of the warranty then no issues.