I just read your PM.
Id really say a big NO to this. 17 is too much for the City, the max you can go is 16.
Firstly, the suspension will give up with 17's much earlier than usual, secondly the ride comfort will be equal to riding on 15's with coilovers.
So I'd really suggest you to sell off the 17 inchers and buy 15's or max 16's if you really like bling bling wheels.