Paceline Riding - Part 1
Submitted by Corky, found online without attribution
"Pace line" riding consists of two or more riders traveling in a tight group in the draft of the rider(s) in front of you. If you are the leader of this pace line, then you are creating the draft for others.
The draft envelope behind a single bicycle is about six feet long. The closer your front wheel is to the rear wheel of the rider ahead of you, the stronger the draft. Riding in a pace line draft can save 20 to 30% of your energy output. This energy savings is what allows the pace line group to travel at higher speeds.