Look closely at the above image, click on it to zoom in. It was taken from the latest version of the excellent Vélo Magazine. It’s Brad Wiggins in profile during his pro career. Notice anything?
Check out the head tube on his bikes, he is going from riding a frame the size of a farm gate to a much smaller frame. With a shorter head tube Wiggins can adopt a lower, more aerodynamic position.
So whilst we’ve heard plenty about Wiggins and weight loss, note the improved position on the bike. The gains here will be substantial, he has shrunk his frame not by one or two sizes but more.
Remember that when climbing a mountain pass it still helps to be aero. You save energy during the often manic riding before the foot of the climb and then you can be climbing at 25km/h. Every watt counts.