I do my wheelies standing up but I think its easier to stand vertical, to the point where my thighs rub against my bars as i pedal. And what was said about leaning back farther requiring the wheel to be lower is true. As long as you balance the wight you are fine. I ride mine straight up with my entire body really close to the bike, but I also know people who ride with the front wheel only a foot r two off the ground but just lean back really far. Hope that helps.