If any of you have been to Milan, the inner circle of the image [1] is more or less the city boundary. That path could be anything between 70 to 100 km according to how they'll design it. I had no problems cycling 100+ km around the city during the second quasi-lockdown of one winter ago. The grey area is what's called "città metropolitana" now, basically the old province of Milan including more than 100 of other cit…
I’ve never been to the city-proper, only the train station, but it seems strange that any of the missing 20% would be in the city center.