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Originally Posted by MNBoxster
Hi,
Just to clarify, there's a big difference between a DOT and a Snell Foundation rating. Fire resistance, while better in the SA Helmets, isn't the only difference.
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To clarify, I was talking about a Snell M rated helmet versus a Snell SA rated helmet. There are several Bell helmets that can be had in either an M rating or SA rating, the difference being the SA has a fireproof lining. Fire resistance isn't the only difference in the ratings, but it is a major difference.
I would never use a non-Snell rated helmet for anything. In situations where fire is not as much of a concern, such as karting or Autocross, and your sanctioning body accepts it, a Snell M-rated helmet can in some cases save you a significant amount of money over an SA rated helmet.
My karting organization does not allow DOT-certified-only helmets. It must be a Snell M or SA rated helmet.