I for one need to use a 70mm stem on my 49cm Pake. I couldn't get a smaller frame because the frames don't get much smaller than that, unless you run a frame that takes 650c wheels. My dad had a IRO Mark V HD (650c), and that frame just felt too tiny. With my bike, I feel like if I had anything more than a 70mm stem, I would be way too stretched out. Some smaller people just need smaller stems.