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Rules

ONUM = One Nation Under Modifieds. We utilize a combined rules package that includes multiple sanctioning bodies at our events. Some variances are allowed and will be posted well in advance of each event. Event rules may be adjusted at anytime to allow fair competition. Check back to this page or on Facebook @onumdm for frequent updates.

Updated February 15, 2024

Tires:

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

RUN YOUR SANCTION. MUST BE LEGAL TO SANCTION RULES.

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 & match.

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

DIRTCAR UMP MODIFIEDS: https://dirtcar.com/rules/division-rules/dirtcar-midwest/dirtcar-modified/
TIRE = Hoosier M30 & M60 RR Option or American Racer KK704. No mix & match.