I raced with a 52/42 front and a 6 speed 13x19 or 18 freewheel. When 7 speed came out, I went to a 12x19 or 18 rear.
Can't remember what I ran in 5 speed because I only used a 5 speed for about a year.
__________________
“Train hard until your legs are tanned, then keep going until the shape arrives.” -Jolanda Neff