Porsche Cayenne Turbo Tyres

[Ropps]

Hi Gents,

I have been told by a tyre garage that my tyres 275/40/20 need to be "N" rated? is this true?

I also was looking at putting 275/45/20 - would this cause an issue? and putting 295/45/20 on the rear for better grip on the road? is this possible

any help would be much appreciated as my Conti's will need replacing soon.

kind Regards

Sandro

[thegoose]

You only need Porsche N rated tyres if your car is under Porsche warranty, if not then anything with the correct load rating will be suitable, so make your own choice as you would with any other car. 275/40x20 tyres can be bought for as little as £50 each new, whether you want to run something of that quality is up to you.

I'm not sure why you'd want to change the size but definitely don't use 275/40 and 295/40 together as they're different rolling radii which isn't good news for the 4 wheel drive system and may even upset the ABS and PSM systems, If you do change then make sure your rolling radii are the same or very close.

Have you found yourself losing the back end when driving on dry Tarmac? If not then you don't need more rubber on the back end. Porsche spent a long time engineering the Cayenne to perform brilliantly, I think they've done a pretty good job and I wouldn't try to improve on it by fitting staggered tyre sizes. As for going up to 45 profile instead of 40 it will mean your speedo under reads slightly but even though the tyres will be bigger I don't think it's so much so that you'll run in to clearance problems, the ride will improve a bit but at the expense of steering response.

[Ropps]

Thanks Marcus.

Very informative. I will stick with the 275/40/20 and I wouldn't want to scrimp on money when buying tyres! Afterall it's the only thing sticking me to the tar mac.

Thanks again.

[Paulog13]

I've been using Hankook Ventus ST's on my Cayenne for the past 3 years after reading reviews of them on Rennlist and find them to be excellent for both grip and wear rate... Only £155 a tyre too...

[thegoose]

...or £112 from www.tyretraders.com then get them fitted for a tenner each.

My summers are the same ones as it happens, although only because they came with the used wheels I bought. They're fine but I haven't tried different types to compare.