Description
The Alpinestars SM3 Radium helmet is a DOT and ECE 2206 certified motorcycle helmet built for riders who want real protection and real ventilation in the Alpinestars SM3 Radium helmet black white gray glossy medium. It’s got 10 inlets and 7 exhaust ports pulling air through the shell so your head stays cool on long, hard rides. The fit is responsive and snug without feeling suffocating, even after hours in the saddle. Alpinestars backs the SM3 Radium with patented technology you won’t find on cheaper lids.
- Keeps airflow moving through 10 inlets and 7 exhaust ports so heat doesn’t build up inside.
- Protects against rotational forces with Alpinestars’ patented low-friction EPS liner coating.
- Built with a thermo-injected polymer blend at variable thickness for solid impact absorption without added weight.
- Delivers a visor release system that sheds the visor under calibrated force to reduce neck stress on impact.
- Fits sport and street riders who need a DOT ECE certified motorcycle helmet that works worldwide.
Order the Alpinestars SM3 Radium helmet with confidence from DDRV, authorized dealer.






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