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🏍️ Ride Smart, Ride Light, Ride Protected – The SM3 Radium Revolution!
The Alpinestars SM3 Radium Helmet ECE06/DOT is a cutting-edge off-road helmet engineered for MX and Enduro riders. Featuring a thermo-injected polymer shell weighing just 1430g, advanced ventilation with 17 vents, and a patented low-friction liner to reduce rotational forces, it offers unmatched protection and comfort. Certified to DOT, ECE 22.06, and FMVSS 218 standards, it also includes an impact-responsive visor release system and eco-friendly, customizable interior components for a premium, sustainable riding experience.
| ASIN | B0FF3VHXFQ |
| Best Sellers Rank | #516,247 in Automotive ( See Top 100 in Automotive ) #1,016 in Motorcycle & Powersports Helmets |
| Brand Name | Alpinestars |
| Certificate Type | DOT |
| Closure Type | Buckle |
| Customer Reviews | 5.0 5.0 out of 5 stars (6) |
| Date First Available | June 23, 2025 |
| Included Components | SM3 Radium Helmet ECE06/DOT |
| Item Package Dimensions L x W x H | 16 x 12 x 12 inches |
| Manufacturer | Alpinestars |
| Model Name | SM3 Radium Helmet ECE06/DOT |
| Package Weight | 5 Pounds |
| Part Number | 8300826-9510-M |
| Shape | Oval |
| Size | Medium |
| Specification Met | FMVSS 218 |
| Style | SM3 Radium Helmet ECE06/DOT |
| Suggested Users | unisex-adult |
| Warranty Description | 30 days for exchanges & returns |
J**A
Very nice helmet
I didn't end up with this helmet for long. It wasn't for me, and it also came in my size, but it was way too small. I currently wear a XXL, and even that is a tad big. I measured my crown at a large, but it didn't fit, so it got sent back. No hassle. Amazing company, very good quality helmet. Just the wrong size, and I didn't feel like I liked the color as much after the fact. But Alpinestars and Bell make my favorite helmets. I ended up with an S-M5 Corp, and I love it. My short time with the S-m3 was amazing. I would have kept it if it was the right size. Was a light helment slighly heavier than my current S-M5 but only by like 100 grams and the airflow was amazing.
O**L
El producto me gusta pero me han enviado el tamaño que es , lo devolvi porque median es pequeño, y me volvieron an enbiar el mismo tamaño,!!! El tamaño correcto es large please large “LARGES “ please
C**S
Good
Save my life lol
M**R
the color of the mouth is off a little
its a very good helmet i was in between a adult small and medium but i went with the small and fits perfect The only thing wrong was that the mouth color is more orange then red but it still is cool
Trustpilot
2 months ago
3 days ago