Oh, I see, the 7.3 FX is available in a step-through women's style frame. It's not listed in the Trek catalog as a WSD bike (though it is clearly designed for women). The WSD bikes I'm talking about are the 7.2, 7.5, and 7.6 FX WSD, which all have men's style frames but with slight tweaks (shorter stems, wider saddles, shorter reach brake levers) to fit women better.