Originally Posted by cyccommute

Probably. The 1992 Schwinn catalog says 700C. Just to be sure, look at the tire and see if it is marked with “622” or “630”. If it is 622, it is a 700C. If the tire is a 630, it is a 27”.

You’ll also need to know the width of the frame. Measure between the dropouts as best you can. It would be best if you use a metric ruler. It may be 135mm or 130mm. 135mm is 5.315” or 5 3/16”. 130mm is 5.118” or about 5 7/64”.