Bicycle helmet GIRO ARIES SPHERICAL MIPS — Size S (51–55 cm), Matte Ano Harbor Blue Fade

GIRO ARIES SPHERICAL MIPS in Size S (51–55 cm) is a road cycling helmet designed to provide a secure fit and advanced impact mitigation for daily training and longer rides. This model incorporates GIRO's SPHERICAL impact-management system combined with integrated MIPS technology to reduce rotational forces during oblique impacts. The helmet's matte Ano Harbor Blue Fade finish offers a discreet, modern look while the S size cradle and adjustment system help maintain stable positioning on smaller head circumferences.

Advantages

The SPHERICAL construction surrounds the head with two layers engineered to manage energy from both linear and rotational impacts, while the integrated MIPS layer adds an additional low-friction interface to help redirect rotational forces. The S size offers an optimized internal shape and adjustment range for head circumferences of 51–55 cm, improving fit security. Lightweight in-shell construction and ventilation channels support comfort during extended rides without compromising protective performance.

Suitable for

• Road cycling and training rides
• Commuting and urban cycling
• Endurance rides and recreational cycling

Key specifications

• Fit size: S, suitable for 51–55 cm head circumference
• Impact system: Dual-layer SPHERICAL impact-management design
• Rotational protection: Integrated MIPS low-friction layer
• Shell finish: Matte Ano Harbor Blue Fade
• Ventilation: Multiple airflow channels for passive cooling
• Adjustment: Internal cradle and dial-fit retention system for micro-adjustments
• Intended use: Road cycling

How to use

Position the helmet level on the head so the front edge sits just above the eyebrows, then tighten the dial-fit retention until the helmet is snug but comfortable. Adjust the side straps to form a V-shape under each ear and fasten the chin strap, ensuring there is enough room to fit one or two fingers between the strap and the chin. Confirm that the helmet does not shift when you nod and that ventilation openings align to promote airflow during rides.

Usage recommendations

Inspect the helmet regularly for visible damage after any impact and replace it if you detect cracks, deformation, or compromised retention components. Clean the helmet with mild soap and water, avoid solvents or high-temperature drying, and store it away from direct sunlight and heat sources to preserve materials and finish.