- Integrated MIPS technology for added safety
- Highly adjustable Roc Loc 5.5 fit system
- P.O.V. visor with 15 degrees of adjustment
- 25 wind tunnel vents for optimal ventilation
- Cool-fit anti-microbial padding for comfort
The Giro Radix MIPS MTB Helmet in Matte Mineral is designed for rugged adventurers seeking a perfect fit and superior protection. Featuring the advanced Roc Loc 5.5 MIPS system, this helmet ensures stability and comfort while safeguarding against rotational forces during impacts. With 25 strategically placed wind tunnel vents, it offers exceptional airflow, keeping you cool on challenging rides. The adjustable P.O.V. visor provides customizable sun protection, while the durable polycarbonate shell and EPS foam liner enhance overall durability without added bulk. Experience the ultimate blend of safety, comfort, and style with the Radix MIPS helmet.
Giro Adults Helmet Sizing Chart
Adult Super Fit
SM | MD | LG | XL |
51 - 55 cm | 55 - 59 cm | 59 - 63 cm | 61 - 65 cm |
Adult Full Face Super Fit
SM | MD | LG | XL |
51 - 53 cm | 51 - 55 cm | 55 - 59 cm | 59 - 63 cm |
Adult Universal
Model | Size (CM) |
Women | 50 - 57 cm |
Adult Unisex | 54 - 61 cm |
Extra Large | 58 - 65 cm |
Youth Helmets
Model | Size (CM) |
Scamp XS | 45 - 49 cm |
Scamp SM | 49 - 53 cm |
Dime XS | 47 - 51 cm |
Dime SM | 51 - 55 cm |
Dime Universal | 50 - 57 cm |
Tremor Youth | 50 - 57 cm |

Giro was founded more than 30 years ago by Jim Gentes, a man with an obsession for design and answering unmet needs. That obsession led him to start making his own products, and ultimately resulted in a company committed to serving the rider through personal expression and advanced performance. Our world has changed dramatically in the past three decades, but Giro has remained steadfastly committed to serving enthusiast riders. Giro is the brand that sweats the details because they understand that riding is more than just a fleeting hobby or a passing fad. Riding is the best part of a great life and your equipment deserves attention to even the smallest of details.
Click & Collect Available
• In-stock items usually ready in 4 hours* • Online Only items usually ready in 1-3 working days More info »
Courier Delivery Available
• $9.99 for orders $99 & under • Free for orders over $99 • Bulky shipping fees apply for bikes & bulky items based on item weight More info »