Free Shipping for orders over $50

Multiple Impact Helmets for Bike and Snow

by Jim Bartlett June 15, 2016

The skate helmet certification requires multiple impacts, while the bike certification does not. But, some bike certified helmets claim to be multiple impact...


The ASTM F1492 skateboard helmet standard requires skate helmets be capable of absorbing multiple impacts. The softer foam liner inside these helmets absorbs impacts and immediately rebounds to it's original shape. So, skate helmets that meet the ASTM skateboard helmet standard are designed to be multiple impact helmets. However, this does not mean ASTM F1492 helmets are approved for bicycle use! To be approved (and legal) for bicycle use, the helmet must also meet the CPSC bicycle standard.


The CPSC bicycle helmet standard requires helmets to protect the rider from a single impact. In a typical bike helmet, the hard foam liner inside the helmet crushes as it absorbs the force of the impact. This is by design, so the foam absorbs the impact instead of your head! But, since the foam crushes at the point of impact, the helmet will no longer offer the same amount of protection in that area. How much protection is lost? It depends on how fast you were going, what you hit, the condition of your helmet, etc. etc. Helmet manufacturers recommend (naturally) that you replace your bike helmet after any significant impact. What is significant? Can't say for sure. For certain, if the shell is cracked or you can see that the foam is crushed - replace the helmet. But, not all damage is visible. So, ultimately, it's your call.


    Does a multiple impact helmet for bicycling and skiing exist? The bicycle helmet would need to meet the US CPSC safety standard. Here's what our suppliers say:

    • ProTec, in past years, offered their SXP line of multiple-impact helmets. According to ProTec, due to "advanced chemical structure and sophisticated processes used to create SXP liners", their SXP helmets rebound to their original shapes to maintain their impact qualities.
    • Bell and Giro - historically - did not claim their helmets to be multiple impact helmets. Prior to introducing the "patent-pending, impact-absorbing dual density Vinyl Nitrile (VN) liner" Bell/Giro argued that helmets, regardless of the liner material used, couldn't be assured to offer unlimited multiple-impact protection. There is no way to predict how hard - and where - you might hit your head the next time you fall. As a result, Bell and Giro both recommend replacing your helmet after a "serious impact."  (NOTE: with the new Giro VN liner, they have changed the decision criteria and conversation about multiple impact capability)
    • What's our take? Both sides of the argument have merit. It comes down to this: what are you comfortable with? One guideline may be this: if the impact was hard enough to make you say "wow, that was a hard hit", then think about replacing your helmet.

    Not sure whether you need to replace your helmet? Check out our articles:

    For more information on helmet certifications, see our Helmet Safety Standards Guide

    Jim Bartlett
    Jim Bartlett


    Founder of XSportsProtective, snowboarder, mountain biker, father of four young kids who love action sports.

    Leave a comment

    All comments will be reviewed before posting.

    Also in Protective Gear News

    Product Spotlight: Leatt DBX 5.5 Neck Brace
    Product Spotlight: Leatt DBX 5.5 Neck Brace

    by Douglas DiLillo February 19, 2017

    Continue Reading →

    Level BioMex Snowboard Wrist Protection - Built In

    by Jim Bartlett October 28, 2016

    Learn More About Level's BioMex Wrist Guards
    Level BioMex Snowboard Wrist Guards - essential protection for your wrists. Learn how it works...

    Continue Reading →

    Kids Helmet Sizing Help
    Kids Helmet Sizing Help

    by Jim Bartlett October 17, 2016

    Proper helmet sizing is critical to protecting your child. When it comes to finding and fitting a new helmet, there are important things you need to know. We've consolidated a lot of information that will help you measure your kid's head, find the correct size to purchase, and then make sure the helmet sits properly on his or her head.

    Continue Reading →