Alpinestars Supertech M8 Solid Helmet

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Alpinestars Supertech M8 Solid Helmet

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Sizing Chart


Alpinestars Adult Supertech M8 Solid Helmet

Alpinestars approach to the creation of the advanced technology in the Supertech M8 draws on its depth of experience from over half a decade of world class innovation across the spectrum of motorsports and especially, its deep rooted commitment to motocross. As with all other categories of technology that Alpinestars has mastered, bringing a new, highly complex, product to fruition requires specialist experience and know-how and a project plan led by the best in the protection development.


  • Shell construction utilizes a highly advanced molding technology with a multi-composite combination: uni-directional carbon composite with aramid layer that gives significant radial strength around the shell, preventing compression but allowing controlled deflection for reducing transmitted impact energy, and providing critical penetration protection
  • 4 anatomical shell sizes
  • Formed with a multi-density EPS polymer, the energy absorbing layer gives an inner helmet profile which soaks up impact forces dissipated over the outer shell at the point of an impact and provides a shape offering a close and comfortable fit
  • Patented A-Head fitting height and angle adjustment system
  • Unique, patented, visor release system is another key attribute incorporated into the design of the Supertech M8
  • Hydration system compatibility
  • Collarbone protection is an important design feature of the Supertech M8 helmet shell base profile
  • Multi-Directional Impact Protection System: MIPS
  • Emergency Release System (ERS)
  • DOT certification and ECE homologation for use worldwide
  • Chin-strap: Wider than certification requirement: 26 mm for comfort and produced with a woven poly yarn to give a soft ‘hand’ feel that connects securely with a double D-ring

Sizing Chart

Size Chart

With tape level, measure the widest point of your head, approximately 1 inch above your eyebrows.

Helmet Size CM Inches
XS 53 to 54 20.8 to 21.2
S 55 to 56 21.6 to 22
M 57 to 58 22.4 to 22.8
L 59 to 60 23.2 to 23.6
XL 61 to 62 24 to 24.4
2XL 63 to 63 24.8 to 25.2


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