Giro Aries Spherical Bicycle Helmets

Introducing the Aries Spherical a breakthrough in cycling helmets that feels like its barely there, yet delivers top-tier protection, airflow, and race-ready performance.

Weighing just 270g (size M, CE), this helmet sets a new standard for lightweight comfort and aerodynamic efficiency without compromising safety.

Cutting-Edge Protection

• Spherical Technology: A Mips-powered ball-and-socket design that redirects impact forces away from the brain

• Progressive Layering: Dual-density Nanobead EPS foam optimizes impact absorption across a range of forces

• AURA II Reinforcement Arch: Transparent shatter-resistant bridges add structural integrity without adding weight

Advanced Cooling & Sweat Control

• 24 Wind Tunnel vents paired with deep internal channeling for exceptional airflow

• DryCore sweat management system: A hidden silicone bead redirects sweat away from the forehead for fast evaporation

• 2.3% cooling improvement over the Aether model

Fit & Comfort

• Roc Loc 5+ Air system offers a secure, micro-adjustable fit

• Ionic+ anti-microbial padding keeps the interior fresh

• Compact, low-profile design reduces drag and boosts comfort

Smart Performance Features

• Eyewear docking ports for secure sunglasses storage

• Full lower hardbody coverage enhances durability and shell protection

• Chamfered edges and refined shaping reduce aerodynamic drag by 4% vs. Aether Spherical

Specs

• Weight: 275g (size Medium CPSC)

• Certifications:

  • US: CPSC Standard (Age 5+)

  • EU: CE EN1078

#1 Rated Helmet by Virginia Tech

Independent testing has rated the Aries Spherical as the best-performing helmet ever tested for injury reductionoutperforming even larger, bulkier helmets.

HOW TO MEASURE YOUR SIZE

Wrap a measuring tape around your head, keeping the tape level from front to back. Note the measurement and reference the Size Guide below.