The 18" wheels probably provide better road noise reduction but you may want to balance that concern against the esthetics of an 18" vs a 19" wheel. Frankly, I felt from an esthetic perspective the 20" wheels looked the best but I compromised with the 19" wheel for better ride comfort. Look at some Porsches at the dealership and compare Porsches with different wheel sizes before making a choice. Just a word of caution, changing the wheels after the fact can get costly.Don't have the car yet, but they would be 18s. Just getting a head start.
Just a reminder that the outer diameter of the 18" tires is exactly the same at the 19" tires and 20" tires. They "fill" the wheel wells to the same degree. Otherwise, Porsche might have to change the final drive ratio for each different wheel size........The 18s may look a bit on the small side......
Not so much, actually, if you're looking for Porsche approved.I am told that there are plenty of high performance tires in the 18" and 19" size but selection may be more limited in the 20" size, if that matters to you.
The Boxster may be quieter (with the roof up) than the Cayman and is sure louder with the roof down. It's nice to have the choice.
As far as the wheel size goes, the 18" are the best riding and the 20" are the hardest riding. Ultimate performance differences?--basically irrelevant on public roads. The bigger wheels do suffer more from pot-hole (and similar) damage so may be less desirable if the road surfaces are bad.
OK, so maybe disconnecting the soundaktor is why my Boxster is quiet.I have owned both and Boxster is always louder, if you disconnect the dreaded sound aktor Cayman transforms to a luxury saloon, until you use sport/sport+
Great info! Thank you. I was thinking of going the dynamat route and now will back off. My gts has 20" michellins, which are supposed to be the best for the car. I wonder if another brand may be quieter. I am willing to give back some performance for less noise.i had planned on sparingly using dynamat on the interior of my cayman but while it was at my friend's shop one of his guys went a little overboard and coated almost everything from the rear firewall back in a layer. i had already done the inside of the outer door skin and the outside of the inner skin and disconnected the aktor. it is more quite inside now but i don't think it was worth the effort. dynamat is a vibration control product, not a sound blocker. to block sound you need a layer of ccf (closed cell foam) and a layer of mlv (mass loaded vinyl), both with 100% coverage (sound is like water - it will find the path of least resistance).
Here's a link to Porsche Tyre Approvals on Porsche.com in the U.K. The lists also provide noise emission figures. https://www.porsche.com/uk/accessoriesandservice/porscheservice/vehicleinformation/tyreapproval/Great info! Thank you. I was thinking of going the dynamat route and now will back off. My gts has 20" michellins, which are supposed to be the best for the car. I wonder if another brand may be quieter. I am willing to give back some performance for less noise.
Any opinions on what brand tires are quieter?
As someone has already stated, the biggest impact on the interior sound in these cars is the road surface itself. The car is very quiet when travelling on smooth tarmac but unfortunately most our roads seem to be made from coarse stone clippings
I have noticed on other cars I have owned that Pirelli tyres do get noisier once they are part worn which is why I am going to swap to Michelin’s next
Also, the cayman wheel wells are lined with plastic where as our Macan has wheel wells lined with some sort of felt. That is where most of the noise will come from
Don't have the car yet, but they would be 18s. Just getting a head start.