New for 2008 is the EA90 TT aluminum clincher. Based on the EA90 Aero, but with a new aerodynamic R4 TT front hub that creates 50% less frontal exposure. The Gen4 31mm deep cross-section rims offer incredible rotational and lateral stiffness providing quicker acceleration and a smoother ride while cutting through the air. This hand-built wheel set is essential for time trials and triathlons.