Despite what it’s told in newspapers (in Italy and abroad), Roma is a nice place to be enjoyed by bike.
Especially if you stick to the center of the town, it’s a beautiful way to go around in places where cars absolutely can’t go.
For example a nice tour in Villa Borghese or in Tridente or on Tevere’s Banks, why not enjoying Kentridge “Triumphs and Laments”.
And there’s also the GRAB, a more than 40 km internal ring, mostly on bicycle lanes. Some of it it’s still to be cleared, but most can be used right now. Enjoy!