my impression was that the SA rated helmet differed from the M rated helmets
in two ways:
1. SA are fire retardant (if trapped inside car more likely to get burned
than trapped on cycle) and
2. SA for multiple impacts, M for single big one. (again due to multiple
bumps inside a car)
i forget where i heard this.
its kind of silly to wear a helmet in autocross. makes us feel more
serious, perhaps. at the big track i wear arm restraints, gloves and need
to get a better helmet! a guy rolled his cobra at thunderhill last year and
busted his thumb all up.
-james
http://thevenom.net/forum
----- Original Message -----
From: Craig Haggart, SSRL Accelerator Ops Group <haggart@SLAC.Stanford.EDU>
To: <pjsimm@inreach.com>
Cc: <BA-AUTOX@autox.team.net>
Sent: Friday, January 04, 2002 8:39 PM
Subject: Re: where to get a new helmet
> > I was thinking a SA helmet for autocross.
>
> SCCA and NASA both allow M-type helmets for autocrossing.
> Unless you plan to go Formula 1 racing sometime soon, an
> SA-type helmet is just going to cost you a whole lot more
> money for no real benefit. (My opinion, of course.)
>
> If you change your mind, you might want to check out
> www.ridegear.com to see the variety of Snell M2000 helmets
> available for reasonable prices.
>
> If a helmet is OK for hurtling down the freeway on top of a
> motorcycle with nothing around you for protection, surely it
> will suffice for use inside a car, with seat belt, shoulder
> harness, and probably an air bag, driving around a parking
> lot in second gear...?
>
> --
> -Craig Haggart
> haggart@slac.stanford.edu
> Sunnyvale, California
> '96 Miata M Edition
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