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Old 09-22-2009, 08:38 PM   #1
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Does anyone know why motorcycle and car helmets are different?

Motorcycle helmets have a much larger opening/visor than car helmets..
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Old 09-22-2009, 08:40 PM   #2
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With motorcycles, seeing is surviving. It's good to have a wide range of sight. In cars, if you're wearing a helmet, you're probably racing. If you're racing, you're probably looking mainly forward. Especially with HANS and halo seats.
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Old 09-22-2009, 08:50 PM   #3
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Motorcycle helmets are also designed to absorb general forces from hitting just about anything in the event of a crash. Auto helmets are mostly designed for hitting roll bars.
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Old 09-22-2009, 09:03 PM   #4
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That's a good point too. Also, motorcycle helmets (gear in general) needs to withstand a lot of friction while you slide along the pavement (which feels a lot like a cheese grater at speed -.-; ).
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Old 09-22-2009, 09:10 PM   #5
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Direct from the horse's mouth:
What are the differences between the SA, M and K standards?

The SA standard was designed for competitive auto racing while M standard was for motorcycling and other motorsports. The K standard was released to accommodate helmets used in karting. There are three major differences between them:
  • The SA standard requires flammability test while the M and K standards do not.
  • The SA and K standards allow for a narrower visual field than M standard (Some SA and K certified helmets may not be street legal).
  • The SA and K standards include a rollbar multi impact test while M standard does not.
Source: FAQs about Snell and Helmets


For more detail, here are the actual standards themselves:

M2005

SA2005
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Old 09-22-2009, 09:14 PM   #6
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also mc helmet nowadays are designed with airflow in mind, ie. vents/fins. also noise levels are a factor
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Old 09-28-2009, 05:01 PM   #7
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oh ok.. I personally would like a wider field of view while racing in a car also though
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Old 09-28-2009, 05:42 PM   #8
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Quote:
Originally Posted by Mach929 View Post
also mc helmet nowadays are designed with airflow in mind, ie. vents/fins. also noise levels are a factor
All the SA helmet manufacturers do that as well... airflow and noise are just as important at 160 in a Formula Atlantic as they are on a bike.
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Old 09-29-2009, 12:47 PM   #9
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Quote:
Originally Posted by boosted475 View Post
oh ok.. I personally would like a wider field of view while racing in a car also though
Then get an SA helmet with a wider/taller viewport. That's one of the reasons I bought a Bell M4 Sport (SA2005). It allows a huge field of view compared to many others I tried on, and I have no problem seeing everything I need to see on track. It was also budget-friendly, under $400. Some SA helmets do have teeny tiny claustrophobia-inducing eye slits, but not all.
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