Bike Wheel Size Measured From Where. The 28 x 2 00 iso 50 622 onwards as a marketing term for wide tires for mountain bikes are known as 29 inch for their larger wheel diameter and measured in decimal sizes. But some manufacturers give the overall width instead.
But some manufacturers give the overall width instead. At 5 6 you re not quite in that very small frame category and it s completely reasonable for a frame suited to your height to use 700c. While not all bicycle frames have a size label it ll save you some work if yours does.
Subtract 6mm from overall width to estimate the rim section or simply measure the distance between the flanges.
Iso 32 622 through iso 42 622 traditional urban bicycle size. Keep in mind that the frame size may be listed in either inches or centimeters. Sometimes very small adult road bike frames will use a smaller wheel size like 650b but it s more common even for small frames to use 700c wheels. At 5 6 you re not quite in that very small frame category and it s completely reasonable for a frame suited to your height to use 700c.