paris-roubaix bicycle insanity

The Paris-Roubaix bicycle race is legendary for its insanity.  A good portion is over terrible roads with racers using modified and sometimes exotic road bikes to endure conditions that include rocks and cobblestones.  

Here is a video from about twenty years back.  The section from abot 0:45 on gives a sense of its craziness.  I doubt these bikes have a very long life.