Watching the Tour, I am trying to learn and understand a little more about racing. I have read that the benefit of drafting increases as you get farther back in the peleton, but only up to a point. What I have not been able to find is what happens after that point. Does the benefit stay level, e.g., after the 7th position (or 8th, or whatever it is) does the benefit stay the same, or does it decrease so that there is a position that is too far back?