helmet myth - Chicagoland Sportbikes
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post #1 of 17 (permalink) Old 04-07-2005, 08:48 AM Thread Starter
 
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helmet myth

a guy i work with claims that, lets say your in a rush one day and your running out of your house and you drop your helmet and it hits the floor (lets say a 3 ft drop) he says the helmet is now garbage. i think thats bullshit. what if you fall off a bike, the helmet will only protect you on the first impact? im not 100% on this, thats why im asking you all. am i right, id love to prove him wrong.
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post #2 of 17 (permalink) Old 04-07-2005, 08:50 AM
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sorry to say, but he is partially right. I will let others post there proof, but I know it is somewhat true

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post #3 of 17 (permalink) Old 04-07-2005, 08:50 AM
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helmets are designed to absorb one impact, not to be reused 20 times. if you drop it from a significant height you very well could have used up its crash absorbtion ability. Some manufacturers offer xray service to determine whether its been compromised.

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post #4 of 17 (permalink) Old 04-07-2005, 08:53 AM
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Your friend is right, if you drop a helmet or you crash with one, it is time to retire that helmet regardless of the visible damage. Many countries also have a law mandating that helmets must be less then 5 years old!

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post #5 of 17 (permalink) Old 04-07-2005, 08:59 AM Thread Starter
 
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well i know that its good for one crash, but a 3 ft drop?
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post #6 of 17 (permalink) Old 04-07-2005, 09:00 AM
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Quote:
Originally Posted by bignate18
well i know that its good for one crash, but a 3 ft drop?
3ft, i'd probably still use it. 4-5ft and i'd be concerned.

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post #7 of 17 (permalink) Old 04-07-2005, 09:00 AM
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I remember an article in Sportrider a bunch of years back concering that, they concluded that if your head isn't in the helmet then the styrofoam won't get crushed. Therefore the helmet is still good.

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post #8 of 17 (permalink) Old 04-07-2005, 09:01 AM
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Quote:
Originally Posted by bignate18
well i know that its good for one crash, but a 3 ft drop?

yup, it's possibly garbage. I know shoei will check it for you if you send it to them.

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post #9 of 17 (permalink) Old 04-07-2005, 09:03 AM
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Some say that storing helmets in cold or fluctuating garage temperatures also contributes to a faster than normal brake down of plastic and compression materials. Further, I've heard that exhaust gases in garages react in a way that speeds degradation of compression materials as well.

The key is not to drop and to replace often. Its your head.

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post #10 of 17 (permalink) Old 04-07-2005, 09:04 AM
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The 'stuff' inside the helmet is designed to compress one (1) time.
After that, it's a mantel piece.
If it rolled off of the couch, it's probably okay, but three feet allows for a helluvva impact.
Think about it...roll off of your bed without bracing yourself. And that's only about two feet.

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post #11 of 17 (permalink) Old 04-07-2005, 09:07 AM
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Quote:
Originally Posted by wtm
The 'stuff' inside the helmet is designed to compress one (1) time.
After that, it's a mantel piece.
If it rolled off of the couch, it's probably okay, but three feet allows for a helluvva impact.
Think about it...roll off of your bed without bracing yourself. And that's only about two feet.

Right but the article in Sportrider concluded that there needs to be something inside the helmet to cause the styrofoam to compress. I supposed if it drops from an extreme height you could theoretically crack the foam. But on a short drop it should be okay.

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post #12 of 17 (permalink) Old 04-07-2005, 09:29 AM
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post #13 of 17 (permalink) Old 04-07-2005, 09:36 AM
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Good call Sticky

http://www.timberwoof.com/motorcycle...afetygear.html
See the section.."I dropped my helmet. Have I ruined it?


Other Interesting links:

http://www.smf.org/testing.html

http://www.motorcyclecruiser.com/acc...r/fliphelmets/

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post #14 of 17 (permalink) Old 04-07-2005, 10:25 AM
 
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Quote:
Originally Posted by bignate18
well i know that its good for one crash, but a 3 ft drop?

All debate aside, do you want a 100% helmet on your nogin, or one that is 80%? 50%? Maybe 0% in the "drop" impact area? It is your head.
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post #15 of 17 (permalink) Old 04-07-2005, 02:08 PM
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Quote:
Originally Posted by Brian
All debate aside, do you want a 100% helmet on your nogin, or one that is 80%? 50%? Maybe 0% in the "drop" impact area? It is your head.

+1 I agree

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post #16 of 17 (permalink) Old 04-07-2005, 03:10 PM
 
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what if you have a fat head? Does that shorten the lifespan of the helmet because it is compressing the inside protection?
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post #17 of 17 (permalink) Old 04-07-2005, 03:21 PM
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If a helmet is dropped, without anything inside, the outer shell could still bow inward. When the shell bows it could cause the styrofoam to have an indentation, leaving space between the outer shell and the inner shell. When that happens there's a gap that must be absorbed or the helmet will not function properly leaving less shock absorbtion strength from the inner styrofoam liner.

Did I get an A+ for the answer?

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