So I don't quite understand it. Its not like I am a hulking mass as I tip the scales at a measly 150lbs. Its not like my thighs are the size of some peoples torso (just head to the track and you will see some of those folks, they are called sprinters). Its not like I even pedal in squares, believe it or not I am quite a smooth spinner.

Despite all of what I am not, somehow, through some unspeakable physics that just don't add up, I was able break a chain ring and crank spider on my first fixed gear bike. On bike that had a perfectly straight chain line, a bike that I specifically built too take a beating.