250 watts is an output a fairly average amateur racer will produce at threshold (where threshold is their one-hour max sustained effort). The pros are significantly higher than that (estimated 350W or more for the latest batch of 1-hour records).
But, an extra 100 watts for even a few seconds can make a significant difference. In cycling, staying in the draft is a major factor. If that short burst of assistance helps a racer keep the wheel of the guy in front, it conserves a lot of energy for later in the race.
Damn, the 350w was Jensie's estimated output (or maybe it was 375?). I knew Wiggins went substantially faster, but didn't realize it translated to that much more power. It's really nuts what these guys can do.
But, an extra 100 watts for even a few seconds can make a significant difference. In cycling, staying in the draft is a major factor. If that short burst of assistance helps a racer keep the wheel of the guy in front, it conserves a lot of energy for later in the race.