Originally Posted by
WhyFi
Yep. There are those of us that wear a helmet on the small side to gain aero benefits. Look at the difference in overhang between the Williams boys and Sagan. The Williams helmets look absolutely massive compared to Sagan's. They could easily run a size smaller and get a tiny amount of aero gain out of it. Those two photos show one of the distinct differences between a successful WT pro and successful domestic pro.