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Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.
• New, aerodynamic design - Simpson's lightest helmet • SA2020 Certified • Composite models are available in 9 colors, including new Gray, Yellow, and Copper • Removable cheekpads - sizes range from .75" to 1.375" for a custom fit • Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet • Includes removable gel earcups • Compatible with all Simpson communication kits • Front chin spoiler for stabillity in open cockpit cars • No front ventilation to keep dirt and debris out • Top and rear vents for ventilation • Optional top and top left offset forced air for cooling and fog mitigation • Optional rear spoiler for more stability • Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S