I have a Sears and Roebuck Ted Williams Edition Year unknown in good condition and was wondering if any body had any information on it. It has a Shimano 3 Speed Coaster Break. It is a Chocolate Brown color and all it need are new tubes and tires. The tire size is 20" x 1 3/8". My understanding is that regular 20" tires dont fit and I have already checked local bike reatailers. Does any body know where i can get these tires? Other info known of bike is that the serial #?? maybe is E56E LIZENZ-PIETSCHEK.