I fit Maxxis Rambler 700x38's in the rear of a 1978 Schwinn LeTour III. 700x40 in front, my 1980 all chrome Schwinn Voyageur has gravel king 700x35 in front and 700x32 in rear, just picked up a 1987 schwinn voyageur and hoping to put the maxxis 40's on it