GIRO Aerohead MIPS time trial helmet (2026) — size M (55–59 cm), Matte White

The GIRO Aerohead MIPS time trial helmet (2026) in size M (55–59 cm) and Matte White finish is a purpose-built aerodynamic helmet for competitive time trials and triathlon racing. It combines an aero-optimized outer shell with integrated MIPS rotational-impact protection to reduce the risk of brain injury in certain impacts while maintaining a streamlined profile aimed at minimizing drag at high speeds. The helmet’s design balances ventilation and aerodynamic performance to suit riders who require low air resistance without fully sacrificing cooling.

Advantages

The helmet integrates MIPS technology to address rotational forces during oblique impacts, alongside a contoured, elongated shell that reduces aerodynamic drag. Its size M fit (55–59 cm) and internal fit system provide a secure and adjustable hold for consistent positioning during intense efforts. The Matte White finish offers a neutral reflective surface that is easy to pair with team kits and race clothing. Materials and construction focus on lightweight durability appropriate for time trial demands.

Suitable for

• Road time trials and prologue stages where aerodynamics are critical
• Triathlon racing, especially non-drafting individual time trial segments
• Solo training efforts and high-speed interval sessions on flat to rolling terrain
• Riders seeking a balance between aerodynamic performance and moderate ventilation

When it may not be suitable

This helmet is optimized for time trial and triathlon use where aerodynamics take priority; it may not be the best choice for everyday commuting or casual rides where maximum ventilation, visibility, or multi-directional impact features for urban environments are more important. Riders who prioritize heavy ventilation for long low-speed climbs or frequent stop-and-go riding may prefer a more vented road helmet.

Key specifications

• Intended use: Time trials and triathlon racing
• Size range: Medium fit for head circumference 55–59 cm
• Protective system: Rotational-impact mitigation (MIPS)
• Shell finish: Matte White
• Aerodynamic design: Elongated, aero-optimized outer shell
• Ventilation: Moderate; designed to balance cooling and low drag
• Retention: Adjustable internal fit system for secure positioning
• Weight category: Lightweight construction for competitive use

How to use

Place the helmet on the head so it sits level, covering the forehead without tilting back. Use the internal adjustment system to achieve a snug, secure fit that prevents excessive movement during efforts; straps should form a V beneath each ear and be fastened comfortably under the chin. Before every ride, check that the MIPS liner and retention system are intact and that the helmet shows no signs of damage. Replace the helmet after any crash or if signs of significant impact or material degradation are present.

What to consider before purchase

• Confirm head circumference falls within the 55–59 cm size range for proper fit
• Assess whether aerodynamic performance is a priority over maximum ventilation
• Consider compatibility with race equipment such as aero bars and eyewear
• Check weight expectations if minimal mass is essential for your setup

Usage recommendations

For best aerodynamic gains, pair the Aerohead MIPS with a riding position optimized for a low torso angle and with properly fitted eyewear. Keep the helmet clean and free of debris; avoid using solvents on the lining or shell. Replace the helmet following any significant impact even if visible damage is minimal, and follow manufacturer guidelines for fit checks and service intervals.