I'm riding Teravail Rampart 700x32 on narrow rims, so they measure 30mm. I can go anywhere on a road map, not necessarily completely comfortably. If it's rough enough that I want knobs that's MTB territory. Any one set of tires I would run 35-38mm slicks, assuming I had the rims to make them work. 16mm rims with 32mm tires is pushing it.