{ "@context": "https://schema.org", "@type": "Product", "api_version": "2.0", "generated_at": "2026-10-24T05:37:58+00:00", "post_type": "helmet", "metadata": { "id": 37262, "title": "GMax AT-21S", "slug": "gmax-at-21s-3", "url": "https://helmetsan.com/de/helmets/gmax-at-21s-3/", "language": "de", "brand": "", "category": "Adventure/Dual Sport", "featured_image": "", "excerpt": "Adventure-Helm mit integrierter Sonnenblende und abnehmbarem Schirm. The GMax AT-21S is engineered as a high-integrity Full Face protective system by GMax, utilizing a structural shell constructed from Polycarbonate. This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the ... Weiterlesen", "modified": "2026-09-08T15:22:31+05:30" }, "identifiers": { "sku": "GMA-GMAXAT", "ean13": "4541627000000", "mpn": "AT-21S", "asin_us": "B09TQZV8K3", "asin_status": "verified", "regions_covered": 22, "amazon": { "us": { "asin": "B09TQZV8K3", "status": "verified" } } }, "specifications": { "brand": "N/A", "helmet_family": "AT-21S", "material": "N/A", "weight_g": 1295, "weight_lbs": "2.85", "homologation_standard": "ECE 22.06", "sharp_rating": "5", "rotational_tech": "1", "strap_type": "Double D-Ring", "noise_db_at_100kph": 84, "comms_ready": "Generic Speaker Cutouts", "head_shape": "Long Oval" }, "variants": [ { "id": "gmax_at_21s_gloss-black", "entity": "helmet", "title": "GMax AT-21S Gloss Black", "type": "Adventure / Dual Sport", "parent_id": "gmax_at_21s", "helmet_family": "AT-21S", "head_shape": "Intermediate Oval", "color": "Gloss Black", "color_family": "Black", "sku": "GMA-AT21-BLK", "finish": "gloss", "is_graphic": false, "availability": "instock", "description": "The Gmax GMax AT-21S is a benchmark Adventure / Dual Sport helmet crafted in Global Certified. Built around Advanced multi-composite aerodynamic shell geometry engineered for optimal impact absorption and stability, it is engineered specifically for Long Oval ergonomics. Designed for aggressive forward tuck and sport-touring postures, delivering maximum high-speed aerodynamic stability and full-coverage chin protection. Certified safety and ergonomic comfort for everyday riding confidence.", "product_details": { "description": "Adventure helmet with integrated sun shield and removable peak." }, "price": { "current": 149.95, "usd": 149.95, "eur": 137.95, "gbp": 118.46 }, "specs": { "material": "Polycarbonate", "weight_g": 1650, "weight_lbs": 3.64, "certifications": [ "DOT" ] }, "geo_media": [ "https://helmetsan.com/assets/helmets/gmax_at_21s_gloss_black_front.png", "https://helmetsan.com/assets/helmets/gmax_at_21s_gloss_black_side.png" ], "helmet_types": [ "Adventure / Dual Sport" ], "introduction": "Positioned in Gmax's Adventure / Dual Sport lineup, the GMax AT-21S brings Global Premium engineering to riders seeking balance between weight, cabin acoustics, and impact protection. Designed for a Long Oval fitment, it connects daily usability with certified DOT, ECE 22.05 track safety.", "story": "The Gmax GMax AT-21S represents Global Premium head protection design, incorporates aerodynamic shell sculpting and multi-density EPS impact damping. Its Polycarbonate shell dampens high-speed wind resonance while multi-density EPS channels absorb kinetic energy across direct and oblique impact vectors.nnOn the road, intake ports channel cool air across the scalp, keeping cabin noise around 84.5 dB at 100 km/h. For riders seeking a Polycarbonate Adventure / Dual Sport helmet tailored to a Long Oval head shape, the GMax AT-21S delivers verified safety and long-distance rider comfort.", "finish_profile": "GMax AT-21S Gloss Black (gloss finish) u2014 Treated with a mirror-finish deep gloss clearcoat that repels road grime and simplifies bug cleanup.", "editorial_note": "Gmax GMax AT-21S in GMax AT-21S Gloss Black. A true do-it-all adventure lid that excels on long highway stretches and dusty backcountry trails alike." }, { "id": "gmax_at_21s_anthracite", "entity": "helmet", "title": "GMax AT-21S Anthracite", "type": "Adventure / Dual Sport", "parent_id": "gmax_at_21s", "helmet_family": "AT-21S", "head_shape": "Intermediate Oval", "color": "Anthracite", "color_family": "Grey", "sku": "GMA-AT21-GRE", "finish": "matte", "is_graphic": false, "availability": "instock", "description": "The Gmax GMax AT-21S is a benchmark Adventure / Dual Sport helmet crafted in Global Certified. Built around Advanced multi-composite aerodynamic shell geometry engineered for optimal impact absorption and stability, it is engineered specifically for Long Oval ergonomics. Designed for aggressive forward tuck and sport-touring postures, delivering maximum high-speed aerodynamic stability and full-coverage chin protection. Certified safety and ergonomic comfort for everyday riding confidence.", "product_details": { "description": "Adventure helmet with integrated sun shield and removable peak." }, "price": { "current": 149.95, "usd": 149.95, "eur": 137.95, "gbp": 118.46 }, "specs": { "material": "Polycarbonate", "weight_g": 1650, "weight_lbs": 3.64, "certifications": [ "DOT" ] }, "geo_media": [ "https://helmetsan.com/assets/helmets/gmax_at_21s_anthracite_front.png", "https://helmetsan.com/assets/helmets/gmax_at_21s_anthracite_side.png" ], "helmet_types": [ "Adventure / Dual Sport" ], "introduction": "Positioned in Gmax's Adventure / Dual Sport lineup, the GMax AT-21S brings Global Premium engineering to riders seeking balance between weight, cabin acoustics, and impact protection. Designed for a Long Oval fitment, it connects daily usability with certified DOT, ECE 22.05 track safety.", "story": "The Gmax GMax AT-21S represents Global Premium head protection design, incorporates aerodynamic shell sculpting and multi-density EPS impact damping. Its Polycarbonate shell dampens high-speed wind resonance while multi-density EPS channels absorb kinetic energy across direct and oblique impact vectors.nnOn the road, intake ports channel cool air across the scalp, keeping cabin noise around 84.5 dB at 100 km/h. For riders seeking a Polycarbonate Adventure / Dual Sport helmet tailored to a Long Oval head shape, the GMax AT-21S delivers verified safety and long-distance rider comfort.", "finish_profile": "GMax AT-21S Anthracite (matte finish) u2014 Treated with a mirror-finish deep gloss clearcoat that repels road grime and simplifies bug cleanup.", "editorial_note": "Gmax GMax AT-21S in GMax AT-21S Anthracite. A true do-it-all adventure lid that excels on long highway stretches and dusty backcountry trails alike." }, { "id": "gmax_at_21s_hi-viz-yellow", "entity": "helmet", "title": "GMax AT-21S Hi-Viz Yellow", "type": "Adventure / Dual Sport", "parent_id": "gmax_at_21s", "helmet_family": "AT-21S", "head_shape": "Intermediate Oval", "color": "Hi-Viz Yellow", "color_family": "Yellow", "sku": "GMA-AT21-YEL", "finish": "gloss", "is_graphic": false, "availability": "instock", "description": "The Gmax GMax AT-21S is a benchmark Adventure / Dual Sport helmet crafted in Global Certified. Built around Advanced multi-composite aerodynamic shell geometry engineered for optimal impact absorption and stability, it is engineered specifically for Long Oval ergonomics. Designed for aggressive forward tuck and sport-touring postures, delivering maximum high-speed aerodynamic stability and full-coverage chin protection. Certified safety and ergonomic comfort for everyday riding confidence.", "product_details": { "description": "Adventure helmet with integrated sun shield and removable peak." }, "price": { "current": 149.95, "usd": 149.95, "eur": 137.95, "gbp": 118.46 }, "specs": { "material": "Polycarbonate", "weight_g": 1650, "weight_lbs": 3.64, "certifications": [ "DOT" ] }, "geo_media": [ "https://helmetsan.com/assets/helmets/gmax_at_21s_hi_viz_yellow_front.png", "https://helmetsan.com/assets/helmets/gmax_at_21s_hi_viz_yellow_side.png" ], "helmet_types": [ "Adventure / Dual Sport" ], "introduction": "Positioned in Gmax's Adventure / Dual Sport lineup, the GMax AT-21S brings Global Premium engineering to riders seeking balance between weight, cabin acoustics, and impact protection. 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