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Giro Bike

Giro Aries Spherical Helmet

Regular price $299.95
Regular price $299.95 Sale price $299.95
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23851 Via Fabricante Ste. 201
Mission Viejo, CA 92691

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Like nothing

A helmet that feels like it isn't there: the all-new Aries Spherical is like nothing before. Its sleeker form and lighter weight (only 270 grams in size medium, CE certification), deliver sensational comfort and cooling power. Spherical Technology, our ball-and-socket design powered by Mips, adds protection by redirecting energy away from the brain in certain impacts, and Progressive Layering with dual densities of Nanobead EPS foam adds more comprehensive energy management. 24 Wind Tunnel vents are maximized by the AURA II Reinforcement Arch, while a plush DryCore brow pad manages sweat and combines with a network of intricately engineered deep internal channeling to elevate comfort. From the proven reliability and adjustability of the Roc Loc 5+ Air fit system, to full lower hardbody coverage to enhance durability, to the meticulous production quality, the Aries is state-of-the-art performance, protection, and style.


In-mold construction
Nanobead EPS foam
Full lower hardbody coverage

24 vents and Deep Internal Channeling

Roc Loc® 5+ Air

275g (size Medium CPSC)

Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older

AURA II reinforcement arch
Ionic+™ anti-microbial padding
DryCore™ sweat management system
Eyewear docking ports


Aura II Reinforcing Arch
The shatter-resistant and translucent Aura II Reinforcing Arch runs throughout the helmet, bolstering structural integrity and allowing massive vents for cooling.

Virginia Tech #1 Ranking
Researchers at independent testing facility Virginia Tech gave Aries Spherical their best score event in their rankings of which helmets best reduce the risk of injury. All Giro helmets with Spherical Technology have received their top level of 5 stars.

The DryCore™ sweat management system utilizes an internal silicone bead to redirect moisture away from the rider's brow and eliminate the irritation of sweat dripping into the eyes.

Spherical Technology
Spherical Technology's Ball-and-Socket design, powered by Mips®, helps redirect impact forces away from the brain by allowing the outer liner to rotate around the inner liner during a crash. It also eliminates contact with hard plastic or slip-planes against the skin.

MIPS Brain Protection System
All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Mips-equipped helmets is to reduce rotational forces. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts.

24 Wind Tunnel Vents
Giro helmets are engineered with our proprietary Wind Tunnel venting system. This elaborate design combines active vents in the helmet’s shell with exhaust channels inside the helmet that thrust cool, fresh air over and around the rider’s head while forcing heat and stale air out.

Deep Internal Channeling
The inner liner of the helmet is aggressively engineered to assist air flowing through the helmet, working in conjunction with our Wind Tunnel vents to provide an easy pathway for cool air to flow in and hot air to exhaust out.

Progressive Layering
Giro helmets with Progressive Layering™ use two different density EPS foam liners to address high- and low-speed impacts for more comprehensive energy management.

Eyewear Docking Ports
Integrated eyewear docking ports with rubber grippers help to secure sunglasses.

Reflective Details
Reflective Details enhance visibility at nighttime or in low-light conditions when illuminated by a light source, such as headlights, by returning the light back to the source and reaching the driver's eye.

Ionic+ Padding
Pure Silver is the secret ingredient that gives IONIC+ ® the power to provide natural, permanent odor protection to keep your helmet feeling fresh.

Customer Reviews

Based on 1 review
David Henner (Danville, California)
So far so good

Only been on one ride. Great ventilation. The construction also has me thinking the protection is above average. I also have the Smith Trace helmet that swivels. this one doesn't have a honeycomb like the trace but the swivel is from 2 layers of construction vs a single later and a thin plastic insert that the trace has. The 2 layers have me thinking this helmet would absorb more shock.

It is also 1cm bigger for the Large size which is better for me because it allows me to wear a bike hat in the winter. All said... it is a helmet. I'll only know how good it is if I had a wind tunnel or when I crash. Yes I would purchase it again!