I don't think smaller will help- I'm not small (when I was test riding stock frames, the 53/54s worked for me), just short-torsoed. Here's the comparison btwn my Serotta and the Bianchis (that are somewhere around my size). I can't get this to really format, but the numbers for my Serotta are the 480/490/174.8/73.5/11, and the other three columns are for the Bianchi 500, 530 and 550.


Serotta 500 530 550

Seat Tube, mm 480 470 500 520
Top Tube-actual, mm 490 515 527 541
Head Tube, mm 174.8 120 135 145
Seat Tube Angle,° 73.5 74.5 74 73.5
Top Tube Slope,° 11 7 6 5