Here's a painfully obvious fact of nature: Girls are different than guys. They generally smell better than guys, know how to ask directions when lost, and are usually better at choosing colours than their hairier, less graceful male counterparts. They often have different needs in a bike too. The Juliana SL is a Superlight that has been tweeked to offer optimised tubing for lighter weight and smoother ride characteristics, shorter top-tubes, lower bottom brackets, slightly more relaxed geometries, and a range of sizes that shrink all the wya down to pixie-small. Juliana - perfect for half the population.
The difference in torso length between men and women is a major factor in why the traditional bikes don't fit women. The Santa Cruz "Juliana Bike" has adjusted the top tube length to fit a women's shorter torso - alleviating the pain in your neck and optimally positioning you for pedalling efficiency and comfort.
To accomodate a womans shorter torso length, the geometry of the frame must be adjusted. Santa Cruz shortens the top tube length to fit women, resulting in comfort, performace and fit.
The crank arm, what the pedal attached to, had been designed by and for men. However, womens legs tend to be shorter, requiring a shorter crank for optimum pedalling efficiency. Santa Cruz implements the femmetry design by specifying the correct crank lengths.

