Why are HPDE Drivers required to have a higher spec helmet?
The SA rating stands for “Special Applications”. This rating was done specifically for automotive competition use and is tested for blunt force impact as would be experienced hitting a roll bar/cage or B-Pillar in addition to being fire resistant. The M rating stands for Motorcycle. M helmets must meet a minimum specification for visibility and peripheral vision as they are primarily designed for motorcycle road use. The SA helmets offer better impact protection while many of the newer styles have excellent visibility and can even be worn with glasses.
