I am 6'4" and I recently got into mountain biking. My wife and I bought some decent used bikes (name brand stuff) and started biking. My first experience on a long and technical trail left me feeling nearly cripp0led afterwards. Now I was using a non-suspension Trek, but the bumps didn't bother me. If you drive a truck it should be expected to ride like one. What bothered me was bending over on the bike for 2 hours. Recently my wife purchased a hybid bike for road use. She was getting frustrated with the constant bending over on her MTB as she is no midget at 6' tall. It has a very upright orientation. Recently she rode it 30 miles with no discomfort. I tried it out and it was very comfortable. So I had the idea to put the upswept bars on my Trek. They are wide and elevate 3.5 inches which afffords amore upright position. I took it over some trails today and it was comfortable and handled the technical sections with much more control. So why is all the high tech engineering put into making you bend over? Aerodynamics are a minimal influence on a tough trail so the gain you would get from a bent over position is arguable.