I rode a medium in the the parking lot with a 90mm stem. Still not sure but it was a little tight. When I get back in a week, the owner is going to let me ride it on a trail. Best way is look at the reach and stack of your current bike and compare it the atlas.So I'm looking at some '13 atlas frames/bikes and would like some feed back on which size. A demo isn't available so what size are the 5'11" 32" inseam types out there diggin' on? I'm leaning towards a medium with a 120mm fork.