I don't see very many road bikes with sloping top tubes. Some "compact" frames like the Giant TCR exist but they are pretty rare plus usually the slope is not very much. Especially with handmade microbuild type guys it seems the level top tube style road bikes are much more popular but this is also true of the big brands.
For reference, the following is a basic view of the approach. Modern seat tubes are available with 350mm length so why not build bikes with top tubes that slope down as much as possible while still allowing the rider to fit? It seems logical to assume that the smaller front triangle would increase lateral stiffness and the longer seat tube mast would provide more favorable vertical compliance.
In any case, what are your thoughts as a builder. Do you feel there is a structural reason for level top tubes on road bikes?
Bookmarks