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Joined: 03 Jun 2017
Posts: 49
Location: Norfolk, UK

PostPosted: Mon Dec 11, 2017 10:04 am    Post subject: Tyre sizes and types. Reply with quote

I'm looking at changing the tyres on my 2003 Cayenne Turbo and have a couple of questions..

It's currently fitted with the budget brands it came with (Accelera on the front and Roadstar on the rear) in 275/40 20. I don't have anything to compare it with, but having budget tyres on a car like this makes me feel like I'm not doing it the justice it deserves. I wouldn't say that I've noticed any problems as such like lack of grip, but I've always thought the ride is quite harsh even in 'comfort' mode. Are Turbos with 20" just like this? Or might tyre make (rather than profile) play a part?

Looking for possible replacements, my gut feeling is to go for the recommended 'N' rated Michelin (are these the factory tyre?)


But these caught my eye too due to the better pricing and better wet and equivalent noise rating:


Any reason to go for the Michelin over the Avon?

Also, I noticed when searching for tyres by registration number, that there seems to be an implication that I should have 275s on the front, but 295s on the rear. Is this so?

Thanks in advance for any thoughts!
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Joined: 15 May 2002
Posts: 10195
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1997 Porsche 993 Carrera 2

PostPosted: Mon Dec 11, 2017 10:29 am    Post subject: Reply with quote

Avoid Avon Tyres, stick to the N rated Porsche Tyre program and that is from actual experience of running a Cayenne Turbo and running a set of Michelin N Rated Diamaris 4x4 Tyres


Front and rear tyres are the same

275/40R20 106 Y
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Joined: 03 Jun 2017
Posts: 49
Location: Norfolk, UK

PostPosted: Mon Dec 11, 2017 8:20 pm    Post subject: Reply with quote

Perfect answer, thanks very much!
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