N rated tyres.

[996dom]

I am after some new rubber and can only find P Zero Rosso's N1 for the rears...315/25-19. The thing thats worrying me is how old is a N1 rated tyre when other sizes are available with a N5 rating?

Also I quite fancy the Conti Sport contact 2 V max which I believe is rated to 225mph but I can't find these with a N rating!

Any ideas.

Cheers

[james s]

There is an n rated contis. N2s I think - but not sure they do it in your size. Try blackciclres.com or mytyres.com

[thegoose]

The N number does not relate to the age - N3 doesn't mean it superceeds N2 and that N2 is obsolete etc.

[996dom]

www.pistonheads.com/gassing/topic.asp?f=48&h=&t=225907

According to the people on this thread N ratings numbers are age related!

Know I'm getting confused.

Dom

[DiscoColin]

IIRC the N number is essentially just the particular version number of a model of tyre. The most recent MPSCs for 997s are N0, current PS2s for a 996 are about N3, Pirelli Corsas are up to about N5 or something. The N number is just incremented the last time the design and/or compound was revised, it isn't the age of the actual tyre.

[john ward]

I have spoken to Porsche HQ about N ratings when buying my last set of tyres. As I cannot quote the guy exactly, my quote here is more or less what was said to me: "N rating means that we (Porsche) have tested these tyres and are confident that customers can take their cars on to a track, thrash them all day, and then drive back on the public roads knowing that their tyres are safe, i.e. the tyre walls are not going to weaken and collapse".

Therefore you do not have to put N rated tyres on, it's just that if you do then you know that Porsche have tested (and therefore approved) them for your safety.

Hope this is useful.

[simply tyres]

DiscoColin said:

IIRC the N number is essentially just the particular version number of a model of tyre. The most recent MPSCs for 997s are N0, current PS2s for a 996 are about N3, Pirelli Corsas are up to about N5 or something. The N number is just incremented the last time the design and/or compound was revised, it isn't the age of the actual tyre.

Good Lad....One is very correct on the ' N '.

What tells the age of the tyre is the DOT Code and this is foundon the sidewallof a tyre below is example

DOT 198* ( made on 19th week 1998 )
DOT 1206 ( made on 12th week of 2006 )

Speed Ratings

Also the sidewall will tell you what the safe limit speed of a tyre is.

example = 235-40-18 97Y ( 97 is the load capacity in Kg that the tyre can handle and Y is the speed limit,is this case 186 Mph)

example 2 = 235-40-18 (97Y) When the load index and speed rating is in brackets thenthe tyre can go beyond 200Mph

Regards Steve

[996dom]

Thanks for the reply's, all very informative.

I'm still a bit unsure on one issue though....I can get a Pirelli P Zero Rosso in 315/25-19 with a N1 porsche rating and on the same shelf is a Pirelli P Zero Rosso in 235/35-19 with a N5 Porsche rating, both are made at the same time.

Now is the N5 tyre better than the N1 as it has gone through 4 evolutions of improvements or is it exactly the same compound etc and just a new size to Pirelli for Porsche cars.

I hope this makes sense!!!

Cheers

Dom

[MauriceC2S]

996dom said:

Thanks for the reply's, all very informative.

I'm still a bit unsure on one issue though....I can get a Pirelli P Zero Rosso in 315/25-19 with a N1 porsche rating and on the same shelf is a Pirelli P Zero Rosso in 235/35-19 with a N5 Porsche rating, both are made at the same time.

Now is the N5 tyre better than the N1 as it has gone through 4 evolutions of improvements or is it exactly the same compound etc and just a new size to Pirelli for Porsche cars.

I hope this makes sense!!!

Cheers

Dom

You need to consider the tyres in sets - for a particular model there will be several approved combinations, and the N digit is associated with each manufacturer / tyre / fitment combination ..

Having said that, I'd be surprised if a 19" Rosso had got to N5 in any combination, as they haven't been approved fitment very long (987 / 997 only). I guess the 235/35 is a 997 front or Boxster somewhere, the 315/25 a GT3 optional rear .. ?? Standard is 305/30 ..

Christophorus has all the latest tyre approvals twice a year, one for summer, the other for - yes, winter !

HTH, cheers, Maurice

[MauriceC2S]

[quote=MauriceC2S
Christophorus has all the latest tyre approvals twice a year, one for summer, the other for - yes, winter !

[/quote]

Well, they used to ! But I just checked 320 to 323, nothing there ! Guess it's too technical for today's Porsche buyers ... ;-) Hopefully they still issue TSBs ...

cheers, Maurice

[tb993tt]

simply tyres said:

example 2 = 235-40-18 (97Y) When the load index and speed rating is in brackets thenthe tyre can go beyond 200Mph

Regards Steve

Beyond 200mph - you sure ?
I understood it as...... "Y" up to 186mph and the old "Z" being over 150mph with no stated top limit.
The only truely approved over 200mph tyres are the low tread Contis but other "Z" tyres can go "above" 150mph so I guess that includes 200mph or 220mph ?

Edited by tb993tt on Thursday 1st March 17:59

[911addict]

I just bought Pirelli Rossos and they are N3 and was told these are the "latest" version. PS: Mine are 17's.