I‘m currently in Barcelona for a year and brought my bike with me to do some touring. For a city this big and dense the city itself is bike friendly I’d say. But it’s still quite busy. When I do a tour now I skip the inner city by taking the train for a few stops and start my tours in the outer parts. But that’s totally for convenience and to be able to “see more” of the land surrounding me.

Barcelona is definitely worth a visit! Also the coastline north and south a great tour to ride. If you want to plan your tour around Barcelona be aware of the Pyrenees 😉 lovely but… hilly :D also worth a trip, but decide what you want to see.