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...More Tyre Questions

luke

Trainee
Joined
21 Jun 2003
Messages
73
Peter's question about his tyres prompted a quick, guilty inspection of my own. My fronts are Pirelli P Zero Rosso 205/50 ZR-17, the rears are GT Radial Champiro 255/40 ZR-17 94W.

None of this means a great deal to me - can anybody shed any light on whether I can relax until tread depth dictates a change, or whether I should drive to my dearest tyre merchant straight away for an urgent fix?


Migration info. Legacy thread was 11825
 
Tyres marked with a "W" and "Y" are designed to go faster than 150 MPH but no faster then 169 & 186 MPH respectively.

But, if they arn't "N" rated (Pirelli's should be; Champiro's probably not) it means they are not approved by Porsche.


Migration info. Legacy thread was 11828
 
Thanks Vic,

Should I worry about the Champiros not being approved by Porsche? Are the Chanpiros a decent product - anybody got any views?


Migration info. Legacy thread was 11829
 
Never heard of Champiros...
I've always found it best to have a matched set of tyres for all four wheels as different compounds respond differently resulting in differing grip / handling front to rear. It all depends what type of driving you are doing however (ie whether the tyres are worked hard or not).
Some Insurance companies will not honour claims without the Porsche approved N rated tyres.

Check out the following:
http://p-car.com/technical/tires.htm

Its a US site but its still relevant.

Migration info. Legacy thread was 11830
 
Luke,

You've only really got a problem with mixed tyres if you are Track Daying the car. On normal road use (especially in winter) it shouldn't be a problem, unless,as Vic says, you are going to cane it over 150.

Interesting point bosch makes about Insurance companies and N rated tyres. I've only ever had one Insurance Company stipulate N tyres (Admiral). All the others were OK and there were no exclusions in the policies. Worth checking the small print on yours.


Migration info. Legacy thread was 11835
 
Champiro....champs or chumps?


Never heard of them winning a grand prix...or anything else. Why chance it, guaranteed you wont be getting the best out of your expensive car...worse, you might find the tyres wanting when you need them most - you will never know. Why chance it? get the basics right and that has to start with 'N' marked rubber on the ground.


Adrian Crawford 911secrets.com performance2and4.co.uk


Migration info. Legacy thread was 11839
 
Previous poster said:
Quote: Originally posted by CT993 on 17 December 2003

Luke,

You've only really got a problem with mixed tyres if you are Track Daying the car. On normal road use (especially in winter) it shouldn't be a problem, unless,as Vic says, you are going to cane it over 150.

Interesting point bosch makes about Insurance companies and N rated tyres. I've only ever had one Insurance Company stipulate N tyres (Admiral). All the others were OK and there were no exclusions in the policies. Worth checking the small print on yours.



Chris, it's not just for Insurance, N means they are tyres Porsche themselves recommend.

Get your scalectrix?

Migration info. Legacy thread was 11840
 
I agree, I would change the Champiro for approved rubber. Guess the best bet would be to get some P-Zero Rossos for the rears.

Most people forget that the tyres are the part of the car that keep them in contact with the road.

Did a search on google for these tyres and most references were on German Sites. Is your car an import???

Anyway I would change them for peace of mind.

Cheers


Migration info. Legacy thread was 11841
 
Thanks for all your posts & comments.

Think I will get the rears changed in the New Year - for some P Zeros.

Sean, the car's not an import, I bought it from Shirleys, who fitted the Champiros new as part of their prepping the car. I've had a word with them about replacing with P Zeros free of charge - seems fair to me that as a Porsche specialist dealer they should only have fitted Porsche approved rubber in the first place - should get an answer tomorrow

Cheers


Migration info. Legacy thread was 11882
 
Shirleys have agreed to replace Champiros with N rated rubber - no problems - will get it sorted early in Jan

Migration info. Legacy thread was 11929
 
Can't believe they put non-N's on !!!!!!

Migration info. Legacy thread was 11941
 

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