• 200TW as per SCCA® National Solo® Rules 2020 Sec 13.3 or with 2021 updates.
  • Fender cutting, flaring and non-standard wheel sizes are allowed.
  • Tires are permitted to be changed at any time. Multiple sets permitted.
  • No active, powered tire warmers.
  • 2021 Update : The Kumho ECSTA V720 ACR is no longer permitted.