Is there a typical sort of time though? I presume you wouldn't spend 10 minutes on the front each.
I was looking at this video earlier http://www.youtube.com/watch?v=J5CfRsmtQ44
They seem to spend no time at the front at all, it's a constant rotation.
which will happen if you loose the wheel)
the slow group was doing 23-24 along the flat, and you would have to do 25 to get past the group to go on the front, I didn't understand it