Giro Air Attack Helmet - Road Bike Shop
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Giro Air Attack Helmet
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The Garmin-Barracuda riders are using them, as well as many other of the peloton's racers. And while it might still be too early to say that we're used to seeing them, the trend among the number of pros who've made the switch is rising. We're talking about those 'odd-looking' round helmets that look like they belong atop BMX riders' domes more than those of road cyclists. But, like any new products adopted by pros that seem out of place at first, there's usually some solid reasoning behind their implementation. As for the new Giro Air Attack helmet, it comes down to a single word: aerodynamics. Traditionally, aerodynamic cycling helmets have relied on sloping shapes, minimal venting, and a teardrop tail design to dictate the flow of air in order to overcome aerodynamic drag. However, with Giro's new Air Attack, its engineers had to rethink the shape of this typical design. The reason for this was simple -- the objective of the Air Attack was to mate an aerodynamic helmet with a design that was compact, well-ventilated, and able to be worn for long periods of time. To start, the helmet was designed with a similar frontal area as Giro's Selector time trial helmet, only with a new 'chopped-off' rear section. Wind tunnel testing proved that the air still 'thinks' it's moving around a long tail, when, in fact, the excess material no longer exists. In addition to now having roughly the same minimal drag (only 11% more) than the Selector, the Air Attack provides a drastic increase in weight savings. In fact, the claimed weight of the Air Attack is 264g versus the Selector's 430g. The second major consideration when designing the Air Attack came down to thermodynamics. After all, Giro's engineers knew that a lightweight, aerodynamic helmet was worthless to the peloton if didn't ventilate well. This led Giro to the development of what it calls 'the Therminator,' which is a head-form heated to the temperature of a human, with 'thermo-couples' added on the outside. Th...