The RATIO™ is a no-nonsense helmet that boasts the features found on premium helmets at a more accessible price.
Beneath the sleek silhouette, you'll find the adjustability of an In Form fit system, Thermostat Control adjustable venting and compatibility with aftermarket audio systems by Outdoor Tech. The Ratio is also available with Mips® - which can offer more protection in certain impacts by redirecting impact energy.
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Review Giro RATIO Helmet