Question: what is the difference between o gauge and o27 gauge?
Answer: O Scale refers to trains that run on 2 rail O track. ... The traditional size operates on either O or O-27 3 rail track. The term O-27 comes from the track line introduced by Lionel that has a sharper radius than the original O gauge 3 rail track. O-27 is lower in profile than O gauge 3 rail track.