This is my take after reading Bike Radar article:
- wind tunnel testing showing 6 minute improvement over 112 miles / 180km full distance triathlon distance
- 2 minutes from upgrading previous 50mm wheels to new 75mm Aeolus RSL
- leaving 4 minutes from ‘other’
Because the new bike has integrated food/water systems, I would think one way for Trek to honestly make the 4 minute claim would to make poor aero choices on previous bike and use random Bontrager water bottles and top-tube feed bag. No idea if that would be enough, just talking out loud.