I have one bike , my 1977 Raleigh Competition GS that is running 23c and it is fun to ride but the road has to be in good shape. Unfortunately a lot of roads in my area are in need of repair. On my Medici I run 25c and that works on most roads but not as comfy as my other bikes that are running 28c. As far as speed goes I am pretty consistent from bike to bike so it is more about feel , I guess. The times I ride the Raleigh I keep thinking of how fun the bike is , very light feeling and quick in the turns , like the Medici. This is another reason one bike won’t work for me!