Bicycle Wheel Size Chart. If all three have a 15 frame there will be a height difference. It s a holdover from an old french system that designated tire sizes using the letters a b and c.
Note that the c does not stand for centimeters. This means that you can easily find the right tire size although it is a danish. Unfit tire size could damage the rim and put the riders in danger.
If the tire is not wide enough you re risking more pinch flats.
This chart will provide guidance on what tires sizes can match your internal rim width. Some are measured by s m l others use cm and some use inches. If all three have a 15 frame there will be a height difference. It is important to note that different kinds of bikes also have different sizing a mountain bike won t fit the same size as a road bike and a bmx won t fit the same size as a mountain bike.