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Rules

ONUM = One Nation Under Modifieds. We utilize a combined rules package that includes multiple sanctioning bodies at our events.  Event rules may be adjusted at anytime to allow fair competition. Check back to this page or on Facebook @onumdm for frequent updates.

Updated May 20, 2024

  • Dirtcar/UMP Modifieds M30 allowed on any corner. M60 optional for any corner.

Updated May 20, 2024

  • 4″ Spoiler added for Dirtcar/UMP Modifieds.
  • Dirtcar/UMP Modifieds allowed to use M60 on all 4 corners.
  • No additional rule adjustments will be considered in advance of The Big Deal May 28 to June 1, 2024

Updated April 26, 2024

  • 7″ Spoiler added for XR Modifieds.

RUN YOUR SANCTION. MUST BE LEGAL TO SANCTION RULES. EXCEPTIONS FOR TIRES AND SPOILERS.

USRA MODIFIEDS: https://usraracing.com/rules/
TIRE = American Racer KK704.

WISSOTA MODIFIEDS: https://www.wissota.org/rules/
TIRE = WISSOTA 35W or American Racer KK704. No mix of brands.

XR MODIFIEDS: https://xrevents.com/rules/
7” Spoiler will be allowed.
TIRE = American Racer KK704, Hoosier G60 Stamped, or Hoosier G60 Unstamped. No mix of brands.

DIRTCAR UMP MODIFIEDS: https://dirtcar.com/rules/division-rules/dirtcar-midwest/dirtcar-modified/
4″ Spoiler will be allowed.
TIRE = Hoosier M30, Hoosier M60 Optional (any corner) or American Racer KK704. No mix of brands.

Tires (All Sanctions):

  • No Limits
  • Grooving, Siping, and Sanding allowed.
  • No Chemical Altering. Extensive tire testing will be conducted.