WOW! I have never owned a vehicle where you could feel the difference, and power loss, from riding in a higher altitude as this bike. I live at sea level but stoped by my in-laws on the way home from Texas who live at 2200'. Did some riding there and if I hadn't rode at higher altitudes once before I would have thought something was wrong. I could not get the front wheel off the ground, well not using my current technique anways. Oh well, just wondering if you guys had any similar experiences... Man I'd hate to live in Denver...