Originally Posted by
DaveSSS
Your height to inseam ratio is not that extreme. Inseam should be measured from floor to firm crotch contact in bare feet. I have an inseam/height ratio of .49. I have no trouble fitting stock frames with a 100-110mm stem, even with a -17 (horizontal) stem because I can tolerate a saddle to bar drop of 10cm. On a road bike, the drop more than doubles with my hands in the drops.
I dont think it was the height to inseam ratio that threw respondents as much as it was the arm reach being less than the height—that is where a shorter top tube might really be beneficial—you can only shorten the stem by so much before your steering gets quirky.