my head is pretty small...size M loaners helmet that provided by SCCA SoloII pretty fits me...but i don't know if all the manufacturers have similar sze chart...sundevilMP5 said:what size helmet are you mx??
mx6929 said:ummm...so not all the DOT approved helmets are Snell 2001??? and what is D and M rates???
Allen said:
Dunno what "D" ratings are, but the "M" ratings are Snell motorcycle rated helmets that I assume is the minimum rated helmet qualified for autocross racing.
Snell Memorial Foundation Website has a lot of helmet info.