I'm 16 years old. I am beginning cycling training and I wondered if I am too heavy to road race. I weight 163 lbs and I am 5' 11". My body fat is around 7-9% as i've figured with several caliper tests. Am I too heavy? What is a good road racing weight? How much does someone like Greg LeMond (I think I am spelling his name right) or Lance Armstrong weight? How tall are they?