SKU: 47061995177

Alpinestars - SM8 Radium 2 Helmet

Sale price$197.98 Regular price$219.98
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Alpinestars - SM8 Radium 2 HelmetAlpinestars SM8 Radium 2 Helmet The S M8s design is coherent to Alpinestars philosophy and shares distinctive themes with other products in the portfolio; a smooth, attractive, profile which is streamlined and free of any external channels and features that might act as a load point in an impact, or compromise the overall integrity of the construction. The surface curvature promotes reduced friction on impact, allowing deflection and the most

Alpinestars - SM8 Radium 2 Helmet

The S-M8’s design is coherent to Alpinestars philosophy and shares distinctive themes with other products in the portfolio; a smooth, attractive, profile which is streamlined and free of any external channels and features that might act as a load point in an impact, or compromise the overall integrity of the construction. The surface curvature promotes reduced friction on impact, allowing deflection and the most efficient transfer of energy to protect the rider’s head from direct force to the skull and referred to the neck and spinal column. The aperture is designed to accommodate a wide variety of goggles and the air vents in the shell are located to maximize ventilation efficiency.

Features: 

  • The S-M8 shell has been profiled with performance as a priority and with a design style that identifies the profile of the helmet and its sculpted surface as uniquely ‘Alpinestars’.
  • Another key feature is the S-M8 shell sizeng solution; each helmet fit size has its own appropriate shell size to deliver the most anatomical solution for the wide variety of fit needs worldwide.
  • The helmet’s shell construction utilizes a highly advanced molding technology with a multi-composite combination: Carbon, high density carbon outer layer that improves strength and efficiency of energy dissipation over the shell.
  • Uni-directional carbon composite layer that gives significantly greater radial strength around the shell, preventing compression but allowing controlled deflection for reducing transmitted impact energy.
  • Aramid fiber layer which provides critical penetration protection.
  • This combination of layers is given even greater performance with an epoxy resin bonding that offers the best possible strength and energy management; limited outer shell deflection means the energy spreads wider and is better absorbed by the EPS liner.
  • The result of the unique shell lay-up process employed in the S-M8 construction results in extremely effective impact protection. With a fully equipped helmet testing facility, within Alpinestars Racing Development Center, an exhaustive impact research program has resulted in the Supertech M8 returning linear and oblique impact performance which far improves upon current helmet regulation standard limits. For direct, linear, impact by an average magnitude of 41% and for rotational acceleration, oblique, impact performance by an average of 48%. 
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47061995177

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4.8 ★★★★★
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María Alejandra
San Leandro, US
★★★★★ 5
An awesome buy
Size: 8 Years, Color: Teal Blue, Size: 8 Years, Color: Teal Blue
Ordered for my son for my wedding. It is comfortable, it is beautiful, came in the right size and color. Ir was so comfy he had it on for the whole wedding.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2025
S
Verified Purchase
suesnow
Grantham, US
★★★★★ 5
True to size and amazing quality
Size: 8 Years, Color: Bright Purple
Perfect for my boys and at a reasonable price that can’t be beat for all we got. Thank you.
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Reviewed in the United States on December 23, 2025
K
Verified Purchase
Kat
Port Orchard, US
★★★★★ 5
Old World Charm
Size: 10 Years, Color: Navy Blue, Size: 10 Years, Color: Navy Blue
What a great value! The fit is nice. The bow tie that comes with it doesn't match. We never tried the suspenders. The pocket for the pocket square is very shallow since the white one is sewn in. The highlight is the vest. Buy or borrow a pocket watch. It makes the outfit!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
T
Verified Purchase
Tracy L.
Lowell, US
★★★★★ 5
Nice suit
Color: Black, Size: Large, Color: Black, Size: Large
Nice, affordable suit! Surprised how well it fit. 6' 1" 195 lb son wore to prom. Pants were a tad short but he didn't care. Looked sharp.
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Reviewed in the United States on May 9, 2026
V
Verified Purchase
VA_Gurl
Chelsea, US
★★★★★ 5
Listed as two pieces, comes with items
Color: Black, Size: Small
This suit is great! It is listed as a two piece suit, but it also comes with a tie and a lapel pin as seen on one of the pictures when you scroll down in the description. My son will be wearing it to prom with a different tie. Fits perfectly. He is 5 foot nine, around 155 pounds, and we ordered a size small. It literally looks tailored to him. Will post pictures after prom!
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Reviewed in the United States on April 20, 2026

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