why run 17" repro cups on a 964?

[hepkat63]

Hi All,
new to Porsche and to the forum and have a question regarding the replacing of the standard wheels. I have just bought my 1990 964 Porsche C2 and it has 17" repro Cups wheels on it. They look just fine and have good tyres on them.
When i bought the car, the guy also had the original 16" wheels for it - they also have good tyres.
After i got home - i cleaned them all up and they are pretty much as good , if not better than the repro cups that are on the car now. So, i am considering putting the original wheels back on and selling off the cups ones.
My question is (and apologies if it is a stupid one) - apart from looks (and they look pretty similar anyway) why would someone decide to put 17" rims on the car ? I thought that a 16" rim would give a better (factory) ride anyway?
As I said, new to Porsche - so maybe there is some great reason I don't know about?

[clutch-monkey]

much broader choice of rubber in 17".

[umgang]

Unsprung weight.
Most aftermarket wheels are much heavier which makes a huge difference in how it drives.

[GaryR]

Originally Posted by clutch-monkey

much broader choice of rubber in 17".

That's the best reason, looks being another. Put on what you like, just be sure you can put the tires you want on whichever wheels you choose.

[Type911]

Because it's the way to go....