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SM3 Radium Helmet

ALPINESTARS
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  • Varied thickness shell construction for optimized protection and light weight
  • Optimized for MX, Enduro, and Offroad use
  • Delivers blend of performance, protection, and comfort
  • Key Features
  • Features thermo-injected shell incorporating a polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight
  • Lightweight outer shell is constructed from impact resistant thermoplastic
  • Inner shell constructed with a composite fiber assembled between the outer shell and the EPS liner for maximum protection against impacts
  • Fit can be tailored to the rider's head thanks to the helmet's crown and cheek pads
  • Construction
  • Multiple density inner liner ensures the helmet is equipped with the correct density in the correct area for enhanced impact absorption, while also helping to reduce overall weight
  • 6-piece EPS liner with five densities to effectively manage volume and impact performance
  • Polished inner EPS liner with special coating to reduce friction with comfort liner for rotational impact management
  • The inner and outer surfaces are engineered to minimize the effects of oblique impacts
  • Low friction coating is applied to the inner part of the main EPS liner to reduce the rotational acceleration forces that can result form certain oblique impacts
  • Maximized ventilation and high levels of heat transfer exchange thanks to ten inlets and seven exhaust ports
  • The visor has been designed to direct air into the ports for enhanced airflow
  • Visor release system ensures the visor is released with the correct pre-determined amount of force, effectively reducing the forces on the rider's neck during an impact
  • Comfort liner is constructed using recycled materials for a lower carbon footprint
  • Hydration tube channels are integrated into the helmet's cheek pads for convenience and performance
  • Soft textile chin strap is 25 mm for optimal safety and rider comfort
  • Protection
  • Equipped with an Emergency Release System and removable cheek pads to permit the safe and easy removal of the cheek pads while the helmet is still on, while the 3D contoured foam ensures rider comfort
  • Chin area optimized for superior impact performance
  • Stainless steel D-rings ensure a tight and secure fit
Material Composition
  • 48% Acrylonitrile-Butadiene-Styren, 20% Polyurethane, 16% Polystyrene (EPS), 6% Polypropylene, 4% Polyvinil Chloride, 2% Ethylene-Vinyl Acetate, 2% Steel, 1% Expanded Polypropylene, 1% Polyamide
Brand
ALPINESTARS
Vendor Part Number
8300726-1553-XL
Base Color
Black
Finish
Gloss
Color/Finish
Black, Red, White
Features
Vented
Gender
Unisex
Graphic
Radium
Model
SM3
Product Name
Helmet
Shell Material
ABS
Size
XL
Size Group
Adult
Type
MX
Units
Each
Helmet & Apparel 2026
Page - 74

ALPINESTARS

HELMET SM3 RADIUM BLK/RED/WH XL

01109163 / 8300726-1553-XL

249,84EUR*
*incl. 19% VAT
10 In Stock
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Related Parts

Part List Part / Part Number Vendor Part Brand UoM In Stock Retail Price
Unique text VISOR CONNECTION SET SM3
01321814
01321814 / 8981025-03
 8981025-03 ALPINESTARS EA
0 In Stock
9,94EUR*
Unique text
f53e6201ca4c6c1c81dfff76e1b4b0bd.jpg
VISOR CONNECTION SET SM3
01321814
01321814 / 8981025-03
9,94EUR*
UoM: EA
0 In Stock
Unique text VISOR SM3 RADIUM BLK/RED/WH
01321891
01321891 / 8980526-1553
 8980526-1553 ALPINESTARS EA
4 In Stock
29,93EUR*
Unique text
f53e6201ca4c6c1c81dfff76e1b4b0bd.jpg
VISOR SM3 RADIUM BLK/RED/WH
01321891
01321891 / 8980526-1553
29,93EUR*
UoM: EA
4 In Stock
Unique text CROWN PAD SM3 GRAY XL
01344152
01344152 / 8960126-11-XL
 8960126-11-XL ALPINESTARS EA
7 In Stock
32,90EUR*
Unique text
f53e6201ca4c6c1c81dfff76e1b4b0bd.jpg
CROWN PAD SM3 GRAY XL
01344152
01344152 / 8960126-11-XL
32,90EUR*
UoM: EA
7 In Stock
Unique text TOP VENT SM3 BLACK
01344154
01344154 / 8970126-10
 8970126-10 ALPINESTARS EA
15+ In Stock
13,86EUR*
Unique text
f53e6201ca4c6c1c81dfff76e1b4b0bd.jpg
TOP VENT SM3 BLACK
01344154
01344154 / 8970126-10
13,86EUR*
UoM: EA
15+ In Stock
Unique text TOP VENT SM3 WHITE
01344155
01344155 / 8970126-20
 8970126-20 ALPINESTARS EA
15+ In Stock
13,86EUR*
Unique text
f53e6201ca4c6c1c81dfff76e1b4b0bd.jpg
TOP VENT SM3 WHITE
01344155
01344155 / 8970126-20
13,86EUR*
UoM: EA
15+ In Stock
*incl. 19% VAT

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