jibberjim wrote:robthehungrymonkey wrote:Women generally have much longer legs to upper body ratio than men do. Therefore a shorter top tube would make more sense on womens bikes.
No they don't, in some parts of the world it's true, but in the UK it's not - see http://www.ncbi.nlm.nih.gov/pubmed/12031138 has the ratios for all ages including young adults, you'll see that it's the MEN that have the longer legs / shorter bodies in the south east of England but that is very much an on average and the individual variation is high. But if it was the case, then as you say a shorter top tube may make sense for those people - but it's slightly more likely to be a male rather than a female here in the UK.
I'm surprised by that, as every girl I have tested it with has significantly longer legs proportionally than men.