"N" rating on tyres
Discussion
Any idea what a 2007 Cayman S should have?
235/35 front and 265/35 rear both R19.
Michelin PS2's if you can still find them, what was the original N rating and what would you get now.
Don't have car here so can't check whats on at the minute. The rears are about 2 years old and threadbare, the fronts maybe a year or so.
If I remember right they were maybe N2 going on N3. Poss N2 rear and N3 front.
Can't see any issue in different compounds front/rear. Doubt many of us are pushing the car hard enough to notice.
Also in gran turismo you can deliberately affect the balance of the car by mixing compunds so it must be ok....
Anyways only seeing a difference now that the rear treads are getting low and the roads a bit muggy. Found myself 'gliding' up the road today after coming out of a junction, couldn't really get power down properly - fun though.
235/35 front and 265/35 rear both R19.
Michelin PS2's if you can still find them, what was the original N rating and what would you get now.
Don't have car here so can't check whats on at the minute. The rears are about 2 years old and threadbare, the fronts maybe a year or so.
If I remember right they were maybe N2 going on N3. Poss N2 rear and N3 front.
Can't see any issue in different compounds front/rear. Doubt many of us are pushing the car hard enough to notice.
Also in gran turismo you can deliberately affect the balance of the car by mixing compunds so it must be ok....
Anyways only seeing a difference now that the rear treads are getting low and the roads a bit muggy. Found myself 'gliding' up the road today after coming out of a junction, couldn't really get power down properly - fun though.
Article from JMG Porsche:
When Porsche buy in tyres from manufacturers they test to see which ones give the best performance, driver comfort and speed of wear. Once they have selected a tyre, they then approve that manufacturer and allow them to display the tyre as N-Rated, also that manufacturer offers a discount to the factory. When a Porsche is new, not using N-Rated tyres can invalidate your warranty and actively encorages owners to use the N-Rated tyres, which is part of the deal with the manufacturers who supply the tyres. Once a Porsche is out of warranty, there is no reason to use N-Rated tyres, the non N-Rated version of a Pirrelli Tyre (for example) is exactly the same as an N-Rated one. Likewise, since any Porsche model has been released, the European standards for tyres improve, as do materials and production techniques. So do not be put off if the tyres on the car you are looking at are not N-Rated.
When Porsche buy in tyres from manufacturers they test to see which ones give the best performance, driver comfort and speed of wear. Once they have selected a tyre, they then approve that manufacturer and allow them to display the tyre as N-Rated, also that manufacturer offers a discount to the factory. When a Porsche is new, not using N-Rated tyres can invalidate your warranty and actively encorages owners to use the N-Rated tyres, which is part of the deal with the manufacturers who supply the tyres. Once a Porsche is out of warranty, there is no reason to use N-Rated tyres, the non N-Rated version of a Pirrelli Tyre (for example) is exactly the same as an N-Rated one. Likewise, since any Porsche model has been released, the European standards for tyres improve, as do materials and production techniques. So do not be put off if the tyres on the car you are looking at are not N-Rated.
trevbeadle said:
Article from JMG Porsche:
When Porsche buy in tyres from manufacturers they test to see which ones give the best performance, driver comfort and speed of wear. Once they have selected a tyre, they then approve that manufacturer and allow them to display the tyre as N-Rated, also that manufacturer offers a discount to the factory. When a Porsche is new, not using N-Rated tyres can invalidate your warranty and actively encorages owners to use the N-Rated tyres, which is part of the deal with the manufacturers who supply the tyres. Once a Porsche is out of warranty, there is no reason to use N-Rated tyres, the non N-Rated version of a Pirrelli Tyre (for example) is exactly the same as an N-Rated one. Likewise, since any Porsche model has been released, the European standards for tyres improve, as do materials and production techniques. So do not be put off if the tyres on the car you are looking at are not N-Rated.
This is demonstrably not true.When Porsche buy in tyres from manufacturers they test to see which ones give the best performance, driver comfort and speed of wear. Once they have selected a tyre, they then approve that manufacturer and allow them to display the tyre as N-Rated, also that manufacturer offers a discount to the factory. When a Porsche is new, not using N-Rated tyres can invalidate your warranty and actively encorages owners to use the N-Rated tyres, which is part of the deal with the manufacturers who supply the tyres. Once a Porsche is out of warranty, there is no reason to use N-Rated tyres, the non N-Rated version of a Pirrelli Tyre (for example) is exactly the same as an N-Rated one. Likewise, since any Porsche model has been released, the European standards for tyres improve, as do materials and production techniques. So do not be put off if the tyres on the car you are looking at are not N-Rated.
Best thread on the topic of N ratings that i've found is here:
http://www.pistonheads.com/gassing/topic.asp?t=143...
On it you'll find questions answered by Jamie Mcwhir who works in R&D for Michelin.
http://www.pistonheads.com/gassing/topic.asp?t=143...
On it you'll find questions answered by Jamie Mcwhir who works in R&D for Michelin.
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