I do have long legs at 6' 3". Fetish claims this to be a 20" frame, but my Cannondale does not have that much seat post. My Cannondale is a true 20" frame center to center. Fetish seems to calculate theirs more like a compact geometry. My setup is 32.5 inches from center of bottom bracket to the top of my seat on all of my bikes. This height was calculated from my inseam. FR and DH setups usually don't follow this formula, because of the need to come off the back of the saddle. I stay in the saddle spinning up gradient the most so it is a true XC setup.