On the way home from work last evening I bought two bikes.Both are Western Flyers. One is a ladies model 5 speed and one a man's ten speed, with fenders and upright handlebars.This morning , seeing them in the daylight and after some cleaning I realized that the man's bike has 27" wheels/tires on it. It is the first I have bought with 27s.The tires will have to be replaced on it. Unfortunatley I can't read any numbers on letters on the sidewalls.Now I need to figure out exactly what tires to buy . I have looked at some of the info on here , including the late Sheldon Brown's charts.Any advice will be welcome.Thanks. :?: