Simpson SD1 Helmet


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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
  • Available in composite and autoclave cured carbon fiber
  • Composite models are available in 9 different colors including 3 new colors: Gray, Yellow, and Copper
  • Removable cheekpads – sizes range from .75″ to 1.375″ to allow for a custom fit
  • Removable Top pads – sizes range from .25″ to .625″ to allow user 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 (Coming Soon)
  • Optional rear spoiler for more stability
  • Comes standard with antifog, antiscratch visor. Non-Antifog clear visor available
  • Visors available in clear, dark smoke, iridium, amber, and chrome
  • Comes standard with premium, aluminum tear off posts compatible with 10209C, 10209CP, and 10209S
  • Available in 2 shells and 6 sizes: XS-XXL
  • Helmets are hand built to order in New Braunfels, TX

Additional information

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Black, Blue, Grey, Matte Black, White, Red, Carbon Fiber


XS, Small, Medium, Large, XL, XXL