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ALPINESTARS SM3 Radium Helmet BLK/WH/GY 2025 Model
01109158VAR

ALPINESTARS SM3 Radium Helmet BLK/WH/GY 2025 Model

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As low as £179.60 £179.60 Regular Price £199.56 £199.56
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  • The S-M3 Helmet is engineered for MX, Enduro and Off-road use featuring innovations and technologies optimized for ease of use, comfort and impact performance.
  • Shell construction featuring a thermo-injected shell incorporating a special polymer blend enhanced by varying degrees of thickness, engineered to deliver optimal combination of impact protection and light weight.
  • Alpinestars patented innovative low friction coating is applied to inner part of the main EPS liner to reduce rotational acceleration forces that can result from certain oblique impacts.
  • This layer acts as a slip plane to mimic the brain's own low friction cerebrospinal fluid, which is the body's natural defence against oblique impacts.
  • Patented visor release system ensures visor release with correct pre-determined force, effectively reducing the forces on the neck during an impact.
  • Maximised ventilation and high levels of heat transfer exchange thanks to 10 inlets and 7 exhaust ports.
    • Size2XL
    Product NameHelmet
    Vendor Part Number8300726-1546-2X
    GenderUnisex
    Base ColourBlack
    BrandALPINESTARS
    TypeOff-Road, MX
    Base FinishGloss
    Colour/FinishBlack, Gray, White
    ModelSM3 Radium
    FeaturesVented
    Shell MaterialABS
    Size GroupAdult
    More Information
    More Information
    Brand ALPINESTARS
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    You're reviewing:ALPINESTARS SM3 Radium Helmet BLK/WH/GY 2025 Model
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    Sizing Charts

    Women

    Size XS S S M M L
    EU 32 34 36 38 40 42
    UK 4 6 8 10 12 14
    US 0 2 4 6 8 10
    Bust 79.5cm / 31" 82cm / 32" 84.5cm / 33" 89.5cm / 35" 94.5cm / 37" 99.5cm / 39"
    Waist 61.5cm / 24" 64cm / 25" 66.5cm / 26" 71.5cm / 28" 76.5cm / 30" 81.5cm / 32"
    Hip 86.5cm / 34" 89cm / 35" 91.5cm / 36" 96.5cm / 38" 101.5cm / 40" 106.5cm / 42"

    Men

    Size XS S M L XL XXL
    UK/US 34 36 38 40 42 44
    Neck 37cm / 14.5" 38cm /15" 39.5cm / 15.5" 41cm / 16" 42cm / 16.5" 43cm / 17"
    Chest 86.5cm / 34" 91.5cm / 36" 96.5cm / 38" 101.5cm / 40" 106.5cm / 42" 111.5cm / 44"
    Waist 71.5cm / 28" 76.5cm / 30" 81.5cm / 32" 86.5cm / 34" 91.5cm / 36" 96.5cm / 38"
    Seat 90cm / 35.4" 95cm / 37.4" 100cm / 39.4" 105cm / 41.3" 110cm / 43.3" 115cm / 45.3"