what I kind of left out was the basic racing dynamic. on a “stage” race like yesterday, it’s most efficient for riders to travel in a group (peloton).
what you tend to get is a small group that will leave the peloton, but with only a few people breaking the wind, they tire and get “reeled” in by the peloton. Not always, but often. Sometimes they get “points” bonuses for being first to certain checkpoints along the route, so it can be beneficial to break. The points are some alternative scoring that I don’t really understand.
So, when postal moved yesterday, if it was just a few of them they might have been reeled in. But, they had enough people go with them (people who probably feared they wouldn’t be reeled in) to make their own mini-peloton. That mini-pel including Ullrich, Hamilton, and I think Heras. It DIDN’T included Mayo.
Actually, Mayo, maybe suspecting a break, fell when he was trying to get closer to the front (according to the announcers). He was a victim of walking the fine line between agression and patience.
So, you might ask, “how do you time the riders in the peloton at the end”. What they do, AFAI can tell is reward time bonuses to places 1-2-3 so that there’s always a mad sprint at the end. But, the rest of the peloton gets the same time. I think this system avoids having 100 riders try to fit across 10 feet of pavement.
That said, I think at some cut-off point in the peloton, they all get +5 seconds from there on back, and maybe a +10 from some other point on back. The point is, they reward a group of riders with the same basic time, except for the first three.
(this is all completely different on climbs where aero isn’t as important, individual time trials, and team time trials.)