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NASCAR makes rule changes to Cup Series short track and road courses

In an effort to improve the racing on short tracks and road courses, NASCAR delivered the following updates to the 2020 Cup Series race package to teams today:

Technical Details

  • Spoiler – 2.75” (from 8”)
  • Splitter – 0.25” overhang (from 2”); approx. 2” wings (from approx. 10.5”)
  • Radiator pan – vertical fencing removed (dimensions of pan remain the same)


  • Bristol Motor Speedway
  • Charlotte Motor Speedway Roval
  • Dover International Speedway
  • Martinsville Speedway
  • New Hampshire Motor Speedway
  • Phoenix Raceway
  • Richmond Raceway
  • Sonoma Raceway
  • Watkins Glen International

“Our goal has always been to provide the best possible racing for our fans, regardless of venue. The 2019 Cup Series race package delivered some of the most exciting races on intermediate and larger tracks that our sport has seen, however we felt we could make improvements to short tracks and road courses. We believe we have found the right balance for 2020 that will allow teams to build off their previous knowledge of this package and showcase exciting side-by-side racing at tracks of all sizes.”

  • Steve O’Donnell, NASCAR Executive Vice President and Chief Racing Development Officer