Hi folks,

I’ve got a 2016 Cayenne on 21” wheels and want to go smaller to improve ride comfort.

I have two questions...

The 20” RS II alloys seem to come in a couple of config options and I understand the ET47 wheels have the right offset for cars with arch extensions, but they seem to come in two further versions. One for air cars and one for steel. I can’t think for the life of me what the difference could be? I’ve found a decent second hand set but they are the ‘air’ version - I have a steel sprung car...

Second question is more straightforward. Would the 19s look stupid with the arch extensions? I’m not a fan of wheel spacers...

Thanks for any help!

Wow, interesting, learn something new about these things all the time.

So how did you find out there are two versions for the different suspensions? I’ve only ever seen different part #s for the RS wheels based on color/finish. In the Porsche parts listings and the Tequipment catalog, I’ve never seen mention of specific wheels for air vs steel suspension options. I have seen part different part #s for TPMS and no TPMS equipped, but it’s still the exact same wheel in those cases.

Do you have two different part #s based on this distinction? Like you I can’t imagine what would possibly be different between the two because of the suspension type. Doesn’t make sense. When I purchased OEM 21” wheels for my 19” equipped 958 CTT, I was never asked, nor was there any different set available for air vs steel springs. Weird.

Well, dunno if I have pics of mine on 19" - hold on, I think I do..

Ok - you can decide for yourself. Extra points if anyone can ID the locations the photos were taken at (done during a coast-to-coast-to-coast trip last year in December - where I put on the snows just in case. 7,000 miles+ later - had gone through 10 minutes of snow in West Virginia..)

Thanks for the pictures - I think they look good!

the following link has the two versions of the wheels on it (for the 9J ET57) You can see that air cars have a p/n ending in 32 and steel cars 42...?

http://content2.eu.porsche.com/prod/...257981004A481C

Wow, very interesting.

So when I looked at your link, I said “Ah-hah! That’s the Euro Tequipment website and it’s for the Cayenne S Diesel, which we don’t have here in the USA...that may be the difference...maybe something unique to that particular model?!”

But then I looked at that same winter wheel/tire set on the USA Tequipment site, using the closest model possible (Cayenne S) and lo and behold, yep there’s a different set specified for the air vs steel suspensions! Really interesting!

So now the mystery continues....what’s the difference?! Since it’s a complete package (wheels/tires/TPMS), the part # corresponds to the package, not the wheel itself. So it just might be something in the package, other than the wheel itself, that’s different for the two suspensions? If you could find a Porsche parts list for just the bare wheel alone, it would be interesting to see there if they list two different part #s for each suspension variant for just the wheel.

I’ve purchased two absolutely perfect OEM Cayenne wheel/tires sets from Craigslist in the past, and felt like I stole them! Unbelievable deals to be found there occasionally.

This mystery of the steel vs air suspension wheel variants is still really strange though. Interesting.

Hi folks,

I’ve got a 2016 Cayenne on 21” wheels and want to go smaller to improve ride comfort.

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