Helmet GIRO Radix MIPS mountain bike, M (55-59 cm), matte sky blue pulse

The GIRO Radix MIPS mountain bike helmet in size M (55–59 cm) combines a low-profile shell with integrated MIPS technology to reduce rotational forces in certain impacts. Finished in matte sky blue pulse, the helmet includes multiple vents for airflow, an adjustable retention system for a secure fit, and internal padding designed for comfort during trail and enduro rides. The design balances protection, ventilation, and adjustability for varied off-road use.

Advantages

The helmet integrates MIPS rotational protection with a durable in-mold shell construction to provide impact resistance and reduced rotational forces. Multiple ventilation channels and vents help maintain airflow during longer efforts, while the adjustable retention system and removable padding enable a personalised fit. The matte sky blue pulse finish offers a neutral aesthetic that resists visible scratches and wear.

Suitable for

• Trail riding where mix of climbs and descents demand ventilation and protection
• Enduro use on technical terrain with higher-speed descents
• All-day rides where comfort and a secure fit are important
• Riders seeking a mid-profile helmet with rotational impact mitigation

When it may not be suitable

This helmet is designed for mountain biking and trail use; it may not be suitable for disciplines that require full-face impact protection, such as downhill racing with full-face helmet requirements. It also may not meet the needs of riders who require sizes outside the M (55–59 cm) range.

Key specifications

• Size: M, fits head circumference approximately 55–59 cm
• Shell style: low/mid-profile mountain bike shell
• Protection technology: integrated rotational impact mitigation system
• Ventilation: multiple vents and internal airflow channels
• Fit system: adjustable rear retention for personalised fit
• Padding: removable and washable interior pads for comfort and hygiene
• Finish: matte sky blue pulse

How to use

Place the helmet squarely on your head so it sits level and covers the forehead. Adjust the rear retention system until the helmet fits snugly without pressure points. Fasten and adjust the chin strap so it forms a V shape under each ear and the buckle sits comfortably under the chin; the strap should be tight enough to keep the helmet stable but allow normal breathing and talking. Replace or wash removable pads per manufacturer care instructions and inspect the helmet for visible damage after any crash; replace the helmet if it has sustained significant impact.

What to consider before purchase

• Confirm head circumference falls within 55–59 cm for proper fit
• Decide whether a mid-profile open-face helmet with MIPS suits your riding discipline
• Consider helmet weight and ventilation relative to typical ride duration and climate
• Check compatibility with accessories such as goggles, lights, or camera mounts

Usage recommendations

For optimal protection, replace the helmet after a significant impact or according to the manufacturer's recommended service life. Use the adjustable retention system to maintain a stable fit during technical sections and keep ventilation passages clear of debris to preserve airflow.