Mountain bike helmet GIRO Radix size L (59–63 cm) Matte Black Static

The GIRO Radix size L (59–63 cm) in Matte Black Static is a mountain bike helmet developed for trail and enduro riding. It combines an in‑mold shell with internal impact-absorbing liner, an adjustable fit system and multiple ventilation channels to balance protection, comfort and airflow. A molded visor provides shade and deflects debris while the size L fit accommodates head circumferences from 59 to 63 cm, making the helmet suitable for adult riders seeking a stable, secure helmet for off-road and daily trail use.

Advantages

The helmet’s in‑mold construction integrates a durable outer shell with an energy‑absorbing liner to reduce impact forces while keeping weight low. The adjustable fit system allows precise tuning for a secure hold on varied terrain, and the ventilation channels are designed to promote airflow and cooling during intense rides. The molded visor offers sun protection and helps keep mud and branches away from the face without compromising visibility.

Suitable for

• Trail riding and enduro on singletrack and forest routes
• Daily off-road training and recreational mountain biking
• Riders requiring a larger fit (59–63 cm) and stable retention
• Conditions where sun protection and debris deflection are useful

Key specifications

• Size range: Large (59–63 cm head circumference)
• Finish: Matte Black Static
• Construction: In‑mold shell with impact-absorbing liner
• Fit system: Adjustable retention for precise fit and stability
• Ventilation: Multiple airflow channels for cooling
• Visor: Molded visor for sun and debris protection

How to use

Measure head circumference at the widest point above the eyebrows to confirm the 59–63 cm size is suitable. Position the helmet level on the head so the front edge sits just above the eyebrows, then tighten the adjustable fit system until the helmet feels secure and centered. Adjust side straps and the chin strap so they form a comfortable Y shape around the ears and fasten the buckle. Check that the helmet does not shift significantly during gentle head movements before riding.

Usage recommendations

Inspect the helmet before each ride for cracks, deep scratches or compromised straps and replace it after any significant impact. Clean the helmet with mild soap and water, and avoid solvents or high‑heat drying. Store in a dry place away from direct sunlight to preserve the matte finish and materials.