The HED H3 has propelled more Grand Tour riders to the podium than any other wheel. one of the reasons for this is the H3 is perhaps the ultimate in all wind conditions. Whether it is a headwind, crosswind, or tailwind, the H3 is fast. Other wheels are certainly speedy, but all other wheels have a specific wind range where they excel. The H3 offers speed no matter where the wind is. The pros know this, and many count on the H3 as their no compromise TT wheel choice.
The key to the wide range of performance is the combination of a 55mm deep rim section, the airfoil section spokes and the smooth transitions between the two. The 55mm deep rim keeps drag low at shallow yaw angles. When the yaw angle goes past 15° the aero spokes work to keep the wheel from stalling, and drag stays flat. The optimum wind angle for the H3 is an amazing. With the H3 wheels, you just need a standard length valve stem because there is a pocket for the valve.