Ps - i have heard folk say genova is somewhat alarming/tricky to cycle around.
Pps - would be nice to see a pic of your bike in naples. Did you take any? Did you take your own bike? If so what?
Nowadays, unless I am touring, I just fly in & hire, I only found 3 hire shops in Naples and they are all expensive compared to BCN where I can get a bike for 8eu a day. No bike pics but here I am on Via Toledo last Friday, more handsome that all Italians put together.

https://photos.google.com/share/AF1...?key=d2VpWTVKZG9jUk9YQU9aSjBTZnFDZUwxV3NPMzdR