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.
Thermostat Control™ adjustable venting allows you to custom-tune airflow instantly with a simple, low-profile control button on the outside of the helmet
Stack Vent™ Technology
The In Form™ Fit System makes it easy to dial in a custom fit in seconds - even with gloves on. An ergo-friendly dial at the base of the helmet provides up to 6cm of adjustment and enhanced stability.
610g (size Medium)
Compatible with aftermarket Giro audio systems by Outdoor Tech
Compatible with aftermarket Giro Audio Systems by Outdoor Tech