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Quelle: http://velonews.competitor.com/2015/...ference_388335


Results

The Kask Bambino time trial helmet was the most aerodynamic. Its smooth shape and lack of venting cut through the wind better than any other in this test.

Among the aero road helmets, the Kask Infinity was fastest, but only with its front vent closed. This helmet, used by the Sky squad at the Tour de France, has a large front vent that can be opened and closed, depending on conditions. With the vent open, the Infinity was only marginally better than our Giro Aeon baseline.

The Specialized Evade was the next fastest, followed closely by the Giro Air Attack. Both claim to provide ample cooling, and top pro teams have used both helmets even on hot days.

As a point of reference, if you switched out the stock aluminum Mavic Cosmic wheels to pricey carbon Zipp 404 Firecrest wheels on a Cervélo S3 aero road bike, WAD is lowered by 65.9 grams. To get those efficiency savings in a helmet swap, a rider would have to switch from the Aeon road helmet to the unvented Kask Bambino time trial helmet. That’s not practical for someone riding on the road; it would be too hot on most days.

Read more at http://velonews.competitor.com/2015/...yrqMctHjwC1.99