Wow, this guy's a true geek:

http://cozybeehive.blogspot.com/2010...ra-attack.html

He is not making a call on whether Cancellara is cheating or not but calculates the kind of wattage that is required for one of Cancellara's fabled attacks. The bottom line is something like 1400 watts for the first five seconds of the attack (to break away from the group) - which supposedly is not totally unattainable for humans - and then almost 700 watts. Pretty impressive stuff.

If you watch the whole video, it doesn't seem that weight would be an issue. Many racing bikes have to have weight *added* to them because they are too light anyway (according to the rules).

I have no opinion on whether this is true or false, but I find it highly entertaining.