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View Poll Results: Helmet wearing habits?

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  • I've never worn a bike helmet

    175 10.59%
  • I used to wear a helmet, but have stopped

    94 5.69%
  • I've always worn a helmet

    644 38.98%
  • I didn't wear a helmet, but now do

    403 24.39%
  • I sometimes wear a helmet depending on the conditions

    336 20.34%
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  1. #8251
    Been Around Awhile I-Like-To-Bike's Avatar
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    Quote Originally Posted by FBinNY View Post
    Yes, but this doesn't change the thrust of my statement.
    Correct, just changed the accuracy of which standards apply; no debate necessary.

  2. #8252
    Senior Member curbtender's Avatar
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    Well, had a front tire wash out and went head first into a curb. Helmet saved me a concussion and saved my ear... didn't help much for my lip nose and teeth.
    “At 50, everyone has the face he deserves.”
    ― George Orwell

  3. #8253
    Nobody mconlonx's Avatar
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    Quote Originally Posted by FBinNY View Post
    Yes and No, but overall this statement is unfair and misleading.

    Like just about every product, from children's toys to aircraft, things are designed based both engineering (to ensure that it'll work and do what it's supposed to do) and cosmetic or other factors to appeal to the market. A product that works great but won't sell, or a beautiful product that doesn't do what it's supposed to are both useless.

    Yes, over the last few years great effort has gone into fashion and marketability, but the helmets still must pass basic engineering standards and the various Snell or ANSI tests before they go into production.
    Not unfair or misleading at all, I was actually being technical with my description. According to the government body which defines what constitutes a bicycle helmet, they are defined by how a manufacturer markets a helmet.

    CPSC published rules and regs definition of a bicycle helmet, p. 11715:
    the definition of bicycle helmet has been changed to read: ‘‘Bicycle helmet means any headgear that either is specifically marketed as, or implied through marketing or promotion to be, a device intended to provide protection from head injuries while riding a bicycle.’’
    I know next to nothing. I am frequently wrong.

  4. #8254
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    Quote Originally Posted by mconlonx View Post
    Not unfair or misleading at all, I was actually being technical with my description. According to the government body which defines what constitutes a bicycle helmet, they are defined by how a manufacturer markets a helmet.

    CPSC published rules and regs definition of a bicycle helmet, p. 11715:



    Yes, a bicycle helmet isn't one unless the seller says it is. That's just reversing the statement that someone can't sell a helmet that doesn't meet the standard. All government rules have some kind of similar statement to define the turf. In this case it ensures that Stetson can't be held to the helmet standard when they sell 10 gallon hats.


    But I posted only because the way you made the statement in response to the quoted passage implied that fashion was trumping engineering in helmet design. If that wasn't the intent, consider my post as a minor technical correction and ignore it.
    Last edited by FBinNY; 07-23-14 at 11:07 AM.
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  5. #8255
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by curbtender View Post
    Well, had a front tire wash out and went head first into a curb. Helmet saved me a concussion and saved my ear... didn't help much for my lip nose and teeth.
    I really could have used some shoulder pads when that happened to me a couple of years ago. Helmet wasn't much use in that one.

  6. #8256
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by FBinNY View Post
    Yes, a bicycle helmet isn't one unless the seller says it is. That's just reversing the statement that someone can't sell a helmet that doesn't meet the standard. All government rules have some kind of similar statement to define the turf. In this case it ensures that Stetson can't be held to the helmet standard when they sell 10 gallon hats.


    But I posted because that way you made the statement, in response to the quoted passage implied that fashion was trumping engineering in helmet design. If that wasn't the intent, consider my post as a minor technical correction and ignore it.

    That really is close to what the authors intended. They also examined the regulations and standards in some detail. Seriously it's a good read.

  7. #8257
    Senior Member italktocats's Avatar
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    Quote Originally Posted by curbtender View Post
    Well, had a front tire wash out and went head first into a curb. Helmet saved me a concussion and saved my ear... didn't help much for my lip nose and teeth.
    maybe a better tire would saved you even more (and saved money on a helmet)

  8. #8258
    Quirky Grifter LesterOfPuppets's Avatar
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    Quote Originally Posted by curbtender View Post
    Well, had a front tire wash out and went head first into a curb. Helmet saved me a concussion and saved my ear... didn't help much for my lip nose and teeth.
    Probably time to get a full face helmet. There are some fairly light ones available.

    Better than eating with a straw, as they say.
    1980ish Free Spirit Sunbird fixed * 1996 Mongoose IBOC Zero-G * 1997 KHS Comp * 1990-ish Scapin * Lemond Buenos Aires Triple

  9. #8259
    Senior Member curbtender's Avatar
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    Accidents are not a planned event, unless you are some kind of extreme rider. It sucks, but it happens. Hey, it was a great ride until then...
    “At 50, everyone has the face he deserves.”
    ― George Orwell

  10. #8260
    Senior Member curbtender's Avatar
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    Ha, I guess at 57 I'm still getting the face I deserve...
    “At 50, everyone has the face he deserves.”
    ― George Orwell

  11. #8261
    Nobody mconlonx's Avatar
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    Quote Originally Posted by FBinNY View Post
    Yes, a bicycle helmet isn't one unless the seller says it is. That's just reversing the statement that someone can't sell a helmet that doesn't meet the standard. All government rules have some kind of similar statement to define the turf. In this case it ensures that Stetson can't be held to the helmet standard when they sell 10 gallon hats.


    But I posted only because the way you made the statement in response to the quoted passage implied that fashion was trumping engineering in helmet design. If that wasn't the intent, consider my post as a minor technical correction and ignore it.
    Nice save, FB! *respectful golf clap*
    I know next to nothing. I am frequently wrong.

  12. #8262
    Senior Member
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    wphamilton:

    I suspect you meant to type 120 to 150 g ?

    Joe
    Living a fact-based life.

  13. #8263
    Senior Member rydabent's Avatar
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    curbtender

    Your accident is the very kind of accident I claim can happen to anyone. The anti helmet posters here seem to claim their "great bike handling skills" will prevent something like that happening to them.

    Some day they will find that their bare head makes a very poor brake pad.

  14. #8264
    Nobody mconlonx's Avatar
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    Quote Originally Posted by rydabent View Post
    Some day they will find that their bare head makes a very poor brake pad.
    You keep saying this like it makes some kind of sense or is clever. It's not.
    I know next to nothing. I am frequently wrong.

  15. #8265
    Senior Member rydabent's Avatar
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    mcon

    Maybe not clever, but it is the truth!!!

  16. #8266
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by Joe Minton View Post
    wphamilton:

    I suspect you meant to type 120 to 150 g ?

    Joe
    No, strange as it may seem it takes 1200 to 1500 g. 120-150g would be typical for a skull fracture.

    For a straight on blow, when the head isn't allowed to move to a side or rotate, it takes much more acceleration for the concussion. But with even an inch movement (instead of fixed) it becomes fatal.

    Here is the quote:

    In the
    BICYCLE HELMETS: A SCIENTIFIC EVALUATIONhttp://www.cyclehelmets.org/papers/p787.pdf "One experiment indicated that the critical acceleration to produce concussion was 1500 g. Unlike the experiments by previous investigators, where the head had always been fixed, in some of these it was allowed to move. This resulted in the interesting finding that a blow to a fixed head caused no concussion, though greater distortion of the skull should have occurred, but the same blow repeated with the head allowed to move 2.5 cm resulted in death. "
    Rotation (or more precisely angular acceleration), even over a very short arc, is where we get in trouble. As far as severe concussions go.

    So what does that mean with respect to the bicycle helmet safety standards? There is a lot of data but not that many rigorous conclusions. Even in the linked evaluation it's noted, "As regards correlation of linear acceleration and degree of cerebral concussion produced, Gurdjian et al. subjected dogs to hammer blows to the head [38]. The results ranged from severe concussion at linear acceleration of less than 100g to none at more than 700g. The authors concluded that no correlation was shown. "

    So on one hand we've got 1500g for critical acceleration, and another showing no correlation with acceleration, and standards that assume that linear acceleration is the main factor. What it DOES mean is that for all that is factually known about traumatic brain injury and protection from, there is more unknown or, sometimes, disregarded. For our purposes, our foamy bike helmets are designed to protect against impulse from a direct impact, and little else. Specifically not angular acceleration.

    As a matter of fact, there is reference to a test with monkeys in helmets (seems appro to the thread). Six wore helmets, and six wore helmets and cervical collars (limiting rotation). All of the helmet only suffered concussions. None of the collared suffered concussions.

    We can go a step further into the almost-unknown. There were more tests about rotations caused by sliding, with the types of helmets we use, at about the speeds we ride. Soft-shell, Styrofoam helmets. Unlike hard-shell helmets, they tended to grab the surface, rotating the head at four to six times the tolerable maximum. Ventilation holes make it worse. Even more disturbing, the added mass of the helmets increase the rotation of a glancing blow.


    So people think I'm insane for wanting to reduce the surface area of a helmet, and reduce the mass and cut the lines so that angular deflection is not as likely. Maybe I have a logical reason after all ...

  17. #8267
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by mconlonx View Post
    Originally Posted by rydabent Some day they will find that their bare head makes a very poor brake pad.

    You keep saying this like it makes some kind of sense or is clever. It's not.
    The bike helmet serves poorly for that as well.

    Later research supports the findings of Corner et al. on the effects of helmets on rotation.In 1991, Hodgson reported tests of hard shell, micro-shell and no-shell helmets in skid-type impacts on concrete inclined at angles from 300 to 600, from a speed around 12 km/h [50]. The hard and micro-shell helmets tended to slide, but the concrete surface penetrated and hung onto the nylon cover and liner of the no-shell helmets, forcing the neck into flexion.
    pge 156 http://www.cyclehelmets.org/papers/p787.pdf

  18. #8268
    Senior Member curbtender's Avatar
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    Hope you all make the right choice for your riding. I'm paying for something I've made a lifestyle. Hey," ain't dead, ain't in jail" as quoted from a friend that can't claim that any more...
    “At 50, everyone has the face he deserves.”
    ― George Orwell

  19. #8269
    Senior Member rydabent's Avatar
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    Please explain a 300 to 600 degree angle.

  20. #8270
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by rydabent View Post
    Please explain a 300 to 600 degree angle.
    30 to 60 with a degree symbol not translated by copy paste. Ctl-F, paste the quote and you'll find it.

    You should read the study if you have questions, seriously.

  21. #8271
    Senior Member howsteepisit's Avatar
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    In less than 60 seconds I determined that is 30 to 60 degrees.
    Recycle, Reclaim, Reuse and Repair
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  22. #8272
    Senior Member italktocats's Avatar
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    Quote Originally Posted by rydabent View Post
    curbtender

    Your accident is the very kind of accident I claim can happen to anyone. The anti helmet posters here seem to claim their "great bike handling skills" will prevent something like that happening to them.

    Some day they will find that their bare head makes a very poor brake pad.
    if you have enough skill, you can save yourself in any condition


    but untill you reach that level, youre gonna have to dismount

  23. #8273
    Nobody mconlonx's Avatar
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    Quote Originally Posted by mconlonx View Post
    You keep saying this like it makes some kind of sense or is clever. It's not.
    Quote Originally Posted by rydabent View Post
    Maybe not clever, but it is the truth!!!
    Quote Originally Posted by wphamilton View Post
    The bike helmet serves poorly for that as well.

    pge 156 http://www.cyclehelmets.org/papers/p787.pdf
    RBent, wrong again.
    I know next to nothing. I am frequently wrong.

  24. #8274
    Senior Member rekmeyata's Avatar
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    Quote Originally Posted by italktocats View Post
    if you have enough skill, you can save yourself in any condition


    but untill you reach that level, youre gonna have to dismount
    I guess Felix Baur, Burry Stander, Carla Swart, Frank Guinn, Peter Gunther, Adrian Buttafocchi,
    Junior Heffernan and many other pro racers who all died being hit by cars, trucks, and motorcycles just don't have as good of skills as you have. Thank you for blessing us with your superior and god like abilities on a bike.
    http://www.youtube.com/watch?v=NF4MIEkIBZs

  25. #8275
    Senior Member howsteepisit's Avatar
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    Quote Originally Posted by rekmeyata View Post
    I guess Felix Baur, Burry Stander, Carla Swart, Frank Guinn, Peter Gunther, Adrian Buttafocchi,
    Junior Heffernan and many other pro racers who all died being hit by cars, trucks, and motorcycles just don't have as good of skills as you have. Thank you for blessing us with your superior and god like abilities on a bike.

    For which a helmet in all likelihood would have not helped. It is a helmet thread after all.
    Recycle, Reclaim, Reuse and Repair
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