Measure twice buy once. Not sure how you measured your inseam, but use a thin book and measure it in cm. Makes things way easier. 30.5 is about 77.4cm for you should be on a 53-54 according to the Rivendell chart. Go larger to get the bars up. Seems weird at first, but you will like it in the long run. Makes the drops usable.

http://www.rivendellbicycles.com/htm...framesize.html