Helmet GIRO Source MIPS (2026) — Bike helmet, size L (59–63 cm), Matte White

The GIRO Source MIPS (2026) is a cycling helmet designed for mountain and trail riding, offering MIPS rotational impact protection and a size L fit for head circumferences 59–63 cm. Finished in Matte White, the helmet combines core safety features and an adjustable retention system to deliver a secure fit and reliable impact management suitable for everyday off-road use and commuting.

Advantages

The helmet integrates MIPS rotational protection to reduce rotational forces during angled impacts and uses an in-mold construction to balance weight and durability. An adjustable fit system ensures consistent contact and comfort across the 59–63 cm range, and the helmet's ventilation and shell design provide airflow for extended rides. Matte White finish offers a neutral appearance that pairs with a wide range of cycling apparel and visibility conditions.

Suitable for

• Mountain biking and trail riding
• Gravel and mixed-surface cycling
• Daily commuting and city rides
• Recreational off-road cycling

When it may not be suitable

This helmet is sized for head circumferences between 59 and 63 cm; it will not fit riders outside that range. It is optimized for general mountain, trail and commuter use and may lack specialized features required by certain disciplines such as full-face downhill racing or time-trial helmets that prioritize aerodynamic shaping.

Key specifications

• Fit range: 59–63 cm head circumference (Size L)
• Protection system: MIPS rotational impact protection
• Shell: in-mold construction for weight and strength balance
• Finish: Matte White
• Intended use: mountain, trail, gravel, and commuting

How to use

Place the helmet on the head so it sits level, covering the forehead without tilting backward. Adjust the retention dial or straps until the fit is snug but comfortable and secure across the 59–63 cm size range. Fasten the chin strap and adjust the slider so the straps form a V just below each ear; tighten the buckle until the helmet remains stable during head movement. Inspect the helmet for visible damage before each ride and replace it after a significant impact.

What to consider before purchase

• Confirm your head circumference falls within 59–63 cm for Size L
• Decide whether MIPS rotational protection meets your safety preferences
• Consider ventilation needs relative to your usual riding intensity and climate
• Check compatibility with accessories such as lights, visors, or goggles

Usage recommendations

Use the helmet for mountain and trail rides as well as commuting; ensure correct fit and strap adjustment before every ride. Replace the helmet after any crash or if the shell or liner show signs of damage. Clean with mild soap and water and avoid solvents or high-heat drying to preserve materials and finish.