Originally Posted by
CliffordK
Fortunately, recently the rim sizes have been somewhat standardized.
700c = 29er = 622
28" may also be the same size???
A smaller outside diameter tire will change your ride somewhat though.
622 is the ISO size, which is also the diameter of the bead seat in millimeters. 28 has been used from time to time in the UK for tubulars, and Continental uses it for their trekking (700c hybrid) tires.