Specific geometry, I don't know about. My 1972 Schwinn, P-15 Paramount will run 35mm and full fenders with room to spare. I think without out the fenders, it could easily run something inthe 40mm range.
My 1981 Trek 710 will run 32mm tires w/full fenders. Both could run thinnner tires if need be. Most all rounders can either be touring bikes or road bikes, hence the term "all rounder"...........