His experiment with equipments, 2013 Ride issue59, he talked about:
1. high stack of spacers on aerobars, reducing the catchment area in your chest… “Instead of opening a hole, by having your arms low, raise them up and block it all” bringing the arms closer to get rid of that void where the wind gets caught in the chest and stomach.
2. move to narrow handlebars. (his is 38cm)
"the easiest thing you could ever do to be more aerodynamic on a bike. All you have to do is make them more narrow and get used to it.” Watch that turn now!
3. longer crank length (his is 180mm) - "This is endurance sport so obviously you want to push with the lowest amount of effort and power is torque-by-RPM, right?"
All still in his 2015 setup, bikeradar July 2015