Originally Posted by
GhostRider62
Comfort is probably most important because if you cannot hold the proper position, you will be sitting bolt upright and that is the slowest of all.
This. There is a reason TT riders need to practice a lot ... staying aero is painful and not terribly efficient. And that is also why TTs tend not to be long ... after 40 minutes of trying to breathe and pedal in that position, riders would need to relax. And as soon as you sit up, you are a sail .... By far the biggest drag in the system is the rider.