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bɹo˙ʎʇɹɐduoɯ&#4
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10,428 Posts
Any cum stains?
 

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ex-rsxer
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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:

1. The SA standard requires flammability test while the M and K standards do not.
2. 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).
3. The SA and K standards include a rollbar multi impact test while M standard does not.
 
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