Originally Posted by ETM
You will be surprised how much drag is created by that. You wont notice it in performance but you definately will in fuel economy at 60mph
+1. And the drag generally increases at a square power of velocity (driving speed) - not much of an issue (other than increased fuel consumption) in most parts of the world, but when driving at 120+ mph with snowboard/ski racks on (not uncommon in Europe) it makes a hell of a difference to handling and acceleration.