Giro Aries Spherical Bike Helmet

Product Overview

The Giro Aries Spherical Bike Helmet represents a significant leap forward in cycling helmet innovation, blending cutting-edge safety technology with lightweight design and exceptional comfort. Weighing just 270 grams in size medium (CE certified), the Aries is approximately 5% lighter than its predecessor, the Aether Spherical, making it ideal for riders who demand both performance and protection. Its sleek, compact profile reduces aerodynamic drag by 4%, giving you an edge during climbs, time trials, or high-speed descents. Powered by Spherical Technology™ and Mips®, the helmet offers advanced rotational impact protection, while innovative features like the AURA II Reinforcement Arch and DryCore™ sweat management ensure durability and rider comfort. Whether you’re tackling steep mountain ascents or navigating technical descents, the Aries delivers state-of-the-art performance in every detail.

Key Features

• Spherical Technology™ Powered by Mips®: This groundbreaking ball-and-socket inner shell design allows for slight rotational movement during angled impacts, helping to reduce brain strain. Combined with Progressive Layering—dual-density Nanobead EPS foam that manages a broader range of impact energies—the system enhances protection without compromising comfort or weight.
• AURA II Reinforcement Arch: Proprietary shatter-resistant, translucent twin bridges run throughout the helmet, providing structural integrity without adding unnecessary weight. These arches support the ultra-low profile and enable both enhanced durability and improved airflow, making them essential to the helmet’s lightweight yet robust construction.
• Advanced Ventilation System: Twenty-four Wind Tunnel-tested vents work in concert with deep internal channeling to draw cool air across the scalp and efficiently expel heat at the rear. This active cooling system maintains optimal rider comfort even during prolonged efforts or hot-weather rides.
• DryCore™ Sweat Management: An innovative silicone bead embedded within the plush brow pad actively redirects sweat away from the forehead toward the temples, where it can evaporate naturally. This eliminates distractions caused by dripping perspiration, keeping your focus sharp whether you’re on the road or in the studio.
• Roc Loc® 5+ Air Fit System: Offers precise, secure fit adjustment with micro-adjustability for personalized comfort. The system integrates seamlessly with full lower hardbody coverage, improving overall helmet stability, longevity, and impact resistance at the sides and back.

Technical Specifications

• Weight: 270 grams (size medium)
• Certification: CE
• Ventilation: 24 Wind Tunnel vents
• Construction: Dual-density Nanobead EPS foam (Progressive Layering)
• Technology Integration: Spherical Technology with Mips®
• Arch System: AURA II Reinforcement Arch
• Sweat Management: DryCore™ silicone bead brow pad
• Fit System: Roc Loc® 5+ Air
• Aerodynamic Improvement: 4% less drag compared to Aether Spherical
• Virginia Tech Safety Rating: Ranked #1 in reducing injury risk

Benefits & Use Cases

The Giro Aries Spherical excels in environments where weight, aerodynamics, and comfort are critical. Its reduced frontal surface area and optimized airflow make it particularly effective during time trials, criterium races, or steep mountain ascents where every gram and watt counts. The combination of low weight and aggressive shaping ensures minimal drag without sacrificing protection. Riders will appreciate how the helmet stays securely positioned thanks to the Roc Loc® 5+ Air system and full lower shell coverage, which also enhances impact resistance at the sides and back.

The DryCore sweat control means no more interrupted focus due to dripping forehead sweat—ideal for hot-weather endurance events, indoor training sessions, or long-distance rides where comfort is paramount. With its Virginia Tech #1 safety rating, the Aries provides confidence whether navigating technical descents or pushing tempo efforts on open roads. The meticulous production quality and thoughtful engineering—from chamfered edges on the AURA II to intricately engineered internal channeling—ensure a seamless blend of style, function, and safety.

Important Notes

This helmet is designed for adult cyclists and requires proper sizing for optimal performance and safety. Always follow manufacturer guidelines for fit adjustment and never modify the helmet structure or padding. While constructed for durability, helmets should be replaced after any significant impact, regardless of visible damage. The package includes only the helmet; straps, pads, or accessories are not separately listed as included items. For best results, clean the interior padding regularly using mild soap and water to maintain hygiene and material integrity.