Hi Cyclingnewbie,

I have a Bianachi although my problem is that I am small. If you are looking at short top tubes, you can pull up different manufacturers on the web and check out the geometry on each one. Look at the lengths of the top tubes on their 58cm bikes and compare them. the Bianchi site is BianchiUSA.com.
Believe or it or not, my bike is a Bianchi Alfana 44 cm frame. The top tube is 514. The Trek WDS actually has a relatively shorter top tube (I believe something like 497 mm for a 47cm bike). Good luck!!

Nina