a TT helmet in a road bike position isn't always going to be more aero, a ride bike aero helmet might be
Nothing might be better than either, and it's still a permitted option under CTT regulations.
Unlikely.
None of the people I've seen testing positions are leaving without helmets. Now maybe the road position is different but I still think it's unlikely that bare is better aerodynamically.
None of the people I've seen testing positions are leaving without helmets.
Are they even testing no helmet?
@hippy started
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Nothing might be better than either, and it's still a permitted option under CTT regulations.