The first time I rode the bikes at this shop, I rode the Quick 5 in one size and the Vita in 2 sizes, but I have no idea what sizes those were. The second time I rode them, I was more concerned with how smooth the ride was since I assessed that I sat fine in both the quick 5 and the smaller vita. The bike I rode the 2nd time was the one I bought but I again just assumed it was the same as the previous time but in the next model up. I mean I can go back and ask if maybe I rode the size smaller the first time because the saddle had to be moved back instead of forward and see what they say.