Miyata made a 45cm 610 touring bike (50cm top tube) in 1986, as well as a 49cm 610 with a 52cm top tube--I know because I have both bikes! Terry also made a lugged steel Symmetry in the early nineties in a 45cm, with a an even shorter top tube of 48cm! Like Easthill, I am vertically-challenged in leg length, so I'm looking for the 'little' rides!