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We first saw the $225 Ionos helmet in the 2007 Tour de France. It has 15-percent more vent volume than the Atmos thus keeps a rider’s head 15-percent cooler, says Giro.
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We first saw the $225 Ionos helmet in the 2007 Tour de France. It has 15-percent more vent volume than the Atmos thus keeps a rider’s head 15-percent cooler, says Giro.



