When the road flattens aerodynamics becomes everything so our cxr ultimate 60c is the best possible choice for races where the pace is super quickcxr ultimate 60 t is much more than another aerodynamic wheelset its a true wheel tire system where everything including the tires work together to reduce drag and increase speed the naca 40national advisory committee for aerodynamics41 defined the airfoil profiles that would give us the best possible aerodynamic performance and this set th