While you’ll never need to find out in an ideal world, it’s reassuring to know that if you bounce your head off the deck the Aries not only exceeds the normal CE and CPSC but it’s the safest helmet ever tested by the independent Virginia Tech laboratory. In fact to be honest it was painfully cold as a bald bloke testing in frosty conditions, but you’ll be glad of the exceptional venting and heat management in hotter climes. And while Giro’s testing only found a 2.3 percent cooling efficiency improvement over the Aether, that’s the breeziest helmet I’d ridden before and the Aries is ridiculously cool. Even before I started riding the minimal padding, ambient airflow and largely unobstructed heat radiation backed up Giro’s ‘Like nothing’ tag line. Giro helmets have fitted me really well since I bought my first one in 1991, so once I’d adjusted the lightweight Y sliders on the straps the medium Aries clicked neatly and securely into place. It’s also seven percent narrower than the Aether – which puts it in contention with conventional construction lids like Specialized’s S-Works Prevail 3 for weight and bulk. At 264g for my medium sample, the Aries is five percent lighter than the Aether it replaces and 2g lighter than the Giro Eclipse Spherical MIPS aero road helmet. While you get a lot in terms of features, what you don’t get is a lot of helmet – but I mean that in a good way. Lots of visible skull means lots of cooling power (Image credit: GuyKesTV) Performance There are rubber grip tabs for the arms of your glasses if you take them off and slide them into the front of the Aries. The lower rim on the inner helmet has cuts outs to pull air up from inside your glasses lenses. The Aries is also the first Giro helmet to use a central forehead vent formed by joining the two central bars early and stopping them short of the lower rim. There are also four exhaust vents and two flank vents on either side with transverse internal channels helping cross flow at lower speeds. which is basically a series of five fully open channels from front to rear. That lets Giro create what they call a 24-vent structure. The outer/upper shell is also reinforced with an evolved version of the Aura strengthening arch with a single front bar and central twin bar. These are tethered together with stretchy MIPS tabs so they can rotate like a ball and socket, dissipating impact energy in the process. That uses two separate hard shell encased, progressive density nano-bead EPS foam shells stacked on top of each other. The Aries is a direct development of Giro’s Aether and shares the same ‘ Spherical MIPS’ design. And it’s lighter than comparable systems too, making it the ultimate in skull-hugging luxury.Giro's unique 'Spherical MIPS' construction uses separate, stretch tethered lower/inner and upper/outer segments that slide over each other to reduce impact trauma (Image credit: GuyKesTV) Design and build In addition to enhancing fit and comfort, Roc Loc® 5 allows you to easily custom tune the fit tension and the fore-aft tilt of the helmet in seconds using a single hand. This is the industry benchmark in comfort, stability, adjustability and weight savings. Inside the Helios is the light and airy Roc-Loc® 5 Air fit system. You’ll also have the sweat-absorbing performance of Ionic+ padding. This anti-microbial padding preventing the sting of sweat running into the eyes and stops an itchy scalp after a sweat ride. The rush of speed is matched by the rush of ventilation. Air is forced through internal channels to optimise the cooling effect and exhaust vents let damp, warm air out. However, with 15 Wind Tunnel™ vents, the Helios offers a rush of cooling air over the scalp. When you’re working hard on the bike, generating big watts and picking up the pace, sweat and heat build-up is inevitable. In a crash, the Mips system is designed to move slightly inside the helmet to help redirect forces away from the head. Rotational motion is a common cause of concussions in oblique hits to the head. For certain impacts, the Mips system can reduce harmful rotational motion that might otherwise be transferred to the user’s head. The Mips system is designed to provide added safety for helmets in many accidents. MIPS (Multi-directional Impact Protection System) At the heart of this protective masterpiece is MIPS® Spherical Technology. When you’re training and racing it’s great to ride fast, but should you crash, always a possibility in the hectic jostling of a fast peloton, the Helios Spherical Road Cycling Helmet (MIPS) provides the protection you need to ride confidently. Turn that big gear, put the power down and sprint for the line.
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