--- product_id: 791471103 title: "SM3 Radium Helmet ECE06/DOT" brand: "alpinestars" price: "S$506" currency: SGD in_stock: true reviews_count: 4 category: "Alpinestars" url: https://www.desertcart.sg/products/791471103-sm3-radium-helmet-ece06-dot store_origin: SG region: Singapore --- # Low-friction liner reduces rotational forces 17 vents for max airflow 1430g lightweight impact shell SM3 Radium Helmet ECE06/DOT **Brand:** alpinestars **Price:** S$506 **Availability:** ✅ In Stock ## Summary > 🏍️ Ride Smart, Ride Light, Ride Protected – The SM3 Radium Revolution! ## Quick Answers - **What is this?** SM3 Radium Helmet ECE06/DOT by alpinestars - **How much does it cost?** S$506 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/791471103-sm3-radium-helmet-ece06-dot) ## Best For - alpinestars enthusiasts ## Why This Product - Trusted alpinestars brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Breathe Easy Tech:** Ten intake and seven exhaust vents create a superior airflow system, keeping you cool and focused on every ride. - • **Brain-Smart Safety:** Patented low-friction liner mimics cerebrospinal fluid to reduce rotational impact forces, elevating your crash protection. - • **Featherlight Armor:** Thermo-injected polymer shell balances ultra-lightweight design with top-tier impact protection at just 1430g (ECE). - • **Impact-Responsive Visor:** Innovative visor release system activates on impact to reduce neck strain, blending safety with smart engineering. - • **Custom Comfort & Eco-Conscious:** Removable cheek pads, hydration tube channels, and recycled comfort liner deliver a personalized fit with sustainable style. ## Overview 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. ## Description Engineered for MX, Enduro, and off-road riding, the SM3 Helmet integrates advanced technologies and innovations designed to enhance ease of use, comfort, and impact protection. Review: 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. Review: 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 ## Features - Thermo-injected polymer shell with variable thickness delivers exceptional impact protection while keeping the helmet lightweight at just 1430 g (ECE) and 1460 g (DOT). - Ten intake vents and seven exhaust ports maximize airflow for superior heat transfer and all-day riding comfort. - Patented low-friction liner coating reduces rotational forces on oblique impacts by mimicking the brain’s natural cerebrospinal fluid slip plane. - Innovative visor release system deploys under predetermined force to reduce neck loads during an impact. - Removable cheek pads, integrated hydration tube channels, and recycled comfort liner offer a customizable fit and eco-conscious performance in a DOT- and ECE 22.06-certified design. Meets Federal Motor Vehicle Safety Standard 218 (FMVSS 218). ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Product Details - **Brand:** Alpinestars - **Color:** Gray/Black/Yellow Fluo Matt - **Material:** Acrylonitrile Butadiene Styrene (ABS), Expanded Polystyrene (EPS) - **Sport:** Motocross - **Vehicle Service Type:** Motorcycle ## Images ![SM3 Radium Helmet ECE06/DOT - Image 1](https://m.media-amazon.com/images/I/61YKSKbJuRL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very nice helmet *by J***A on January 22, 2026* 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. ### ⭐⭐⭐⭐⭐ Review *by O***L on December 23, 2025* 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 ### ⭐⭐⭐⭐⭐ Good *by C***S on December 19, 2025* Save my life lol --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/791471103-sm3-radium-helmet-ece06-dot](https://www.desertcart.sg/products/791471103-sm3-radium-helmet-ece06-dot) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-05-26*