I just discovered this as well while shopping the last month. If I went strictly by stand over height, I was looking at 63-64cm. frames. But once I was on them, they were way too stretched out for my upper body to be comfortable. I ended up being fitted in a 60 cm frame with a stock stem, and only the seat slid back less than 1 inch. It feels comfortable, and I am glad ended up being fitted rather than going by strictly a stand over height.