{ "@context": "https://schema.org", "@type": "Product", "api_version": "2.0", "generated_at": "2026-11-11T11:05:40+00:00", "post_type": "helmet", "metadata": { "id": 101532, "title": "Ninja D4", "slug": "ninja-d4", "url": "https://helmetsan.com/pl/helmets/ninja-d4/", "language": "pl", "brand": "", "category": "Open Face", "featured_image": "", "excerpt": "Lekki kask otwarty z podnoszoną osłoną przeciwsłoneczną do codziennej jazdy. Kask Ninja D4 został opracowany przez markę Studds jako zaawansowany system ochrony typu kask otwarty, wykorzystujący skorupę strukturalną wykonaną z wielokompozytowa skorupa strukturalna z warstwą EPS. Taki układ warstw gwarantuje progresywne rozpraszanie kinetycznej energii uderzenia, równomiernie absorbując obciążenia na zewnętrznych powłokach i chroniąc wewnętrzną warstwę ... Dowiedz się więcej", "modified": "2026-09-20T10:42:35+05:30" }, "identifiers": { "sku": "STU-STUDDS", "ean13": "8901234567890", "mpn": "D4", "asin_us": "B08X7Y2Z9A", "asin_status": "verified", "regions_covered": 22, "amazon": { "us": { "asin": "B08X7Y2Z9A", "status": "verified" } } }, "specifications": { "brand": "N/A", "helmet_family": "Ninja D4", "material": "N/A", "weight_g": 1124, "weight_lbs": "2.48", "homologation_standard": "ECE 22.06", "sharp_rating": "4", "rotational_tech": "1", "strap_type": "Double D-Ring", "noise_db_at_100kph": 92, "comms_ready": "Generic Speaker Cutouts", "head_shape": "Intermediate Oval" }, "variants": [ { "id": "studds_ninja_d4_matte-black", "entity": "helmet", "title": "Studds Ninja D4 Matte Black", "type": "Open Face", "parent_id": "studds_ninja_d4", "helmet_family": "Ninja D4", "head_shape": "Intermediate Oval", "color": "Matte Black", "color_family": "Black", "sku": "STU-NIN-BLK", "finish": "matte", "is_graphic": false, "availability": "instock", "description": "The Studds Ninja D4 is a benchmark Open Face helmet crafted in Global Certified. 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Its ABS 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 92.5 dB at 100 km/h. For riders seeking an ABS Open Face helmet tailored to an Intermediate Oval head shape, the Ninja D4 delivers verified safety and long-distance rider comfort.", "finish_profile": "Studds Ninja D4 Matte Black (matte finish) u2014 Treated with a mirror-finish deep gloss clearcoat that repels road grime and simplifies bug cleanup.", "editorial_note": "Studds Ninja D4 in Studds Ninja D4 Matte Black. The sweet spot for everyday street riders seeking lightweight comfort, crisp aerodynamics, and modern safety." }, { "id": "studds_ninja_d4_grey", "entity": "helmet", "title": "Studds Ninja D4 Grey", "type": "Open Face", "parent_id": "studds_ninja_d4", "helmet_family": "Ninja D4", "head_shape": "Intermediate Oval", "color": "Grey", "color_family": "Grey", "sku": "STU-NIN-GRE", "finish": "matte", "is_graphic": false, "availability": "instock", "description": "The Studds Ninja D4 is a benchmark Open Face 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 Intermediate Oval ergonomics. Optimized for urban commuters and retro cruisers, offering lightweight agility, wide peripheral vision, and step-through convenience. 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