Woodchip
It's all about the bikes
Not really. It is am immense team effort to win a sprint, where the sprint train starts off with 9 men all giving their all and as each one burns out you are left with two. This is the lead-out man and the sprinter. The lead-out man is a pretty good sprinter in themselves but come the 400 metre marker he will pull to one side as the sprinter ramps up his speed.Thanks. So, would 9 not be enough to try and win Green and Yellow jerseys?
At the end of a sprint all 9 men are shattered. That is why a team generally only concentrates on green or yellow.
That's my take anyway. I'm sure 1066 family man or SB will correct me on any points I've got wrong.