my info is sketchy; this i know, it is totally European, the riders aren't truly cycling for that long, i have heard that the events last 6 hours each night, 2 riders per team. it's been around forever, i heard there were 6 day races at the old auditorium in Minneapolis. sounds like the atmosphere at the track is similar to keiren racing in japan. when i make a trip to belgium i'll fill you in on the details
here's some reference material
http://www.pezcyclingnews.com/?pg=fullstory&id=6479
http://www.cyclingnews.com/track/?id=sixdayintro00
