Got my G-Force (SA 2010) online for xmas and it fits perfectly. Though my wife went through UPS and had to pay $100 for shipping/customs so it didn't work out to be any cheaper than buying locally.
I'm aware of that as well, still doesn't change my assumption that it is the same helmet with a different lining. The motorcycle market is much larger than the automotive racing market, the economics don't make sense to engineer and manufacture a different helmet.
Try to find a motorcycle helmet that is identical to an auto helmet. All the big brands have two separate lines of helmets and the visual differences between bike and auto are easy to spot. SA helmets do have to pass extra tests.
I don't know why people will spend thousand and thousands on making their cars faster, and not protect their head with the proper gear, you head is like a bowling ball on a spring, when you crash, your head really bounces around,
here is a video of a light crash, what his head and listen to it hit, if you still think that an SA rated helmet is not worth it, well good luck.
What are the differences between the SA, M and K standards?
SA Standard was designed for auto racing while M Standard was for motorcycling and other motorsports. There are three major differences between them:
-SA standard requires flammability test while the M standard does not;
-SA standard allows narrower visual field than M standard (Some SA helmets may not be street legal);
-SA standard has rollbar impact test while M standard does not.
What are the differences between the SA, M and K standards?
SA Standard was designed for auto racing while M Standard was for motorcycling and other motorsports. There are three major differences between them:
-SA standard requires flammability test while the M standard does not;
No question, this is true. This is a good thing and a bad thing. Nomex does not absorb sweat as well and the helmet is usually not as comfortable. Fine for a race driver, but for a weekend warrior it might be better if they were more comfortable.
-SA standard allows narrower visual field than M standard (Some SA helmets may not be street legal);
Interesting, not sure how this could be a good thing...
-SA standard has rollbar impact test while M standard does not.
Does not mean that it would not pass, only that it was not tested for it.
Interesting, not sure how this could be a good thing....
Ya it's wierd.
I'm thinking maybe because on a bike you are turning your head alot more to see what's beside you, and in a vehicle after you lose sight of the car in your mirror you only have to move your head slightly to catch the car beside you.
1989 325 IX Touring 
Linear Mode
