NASCAR Rolls Out Lower Downforce Package For Third Time This Season

NASCAR will roll out its updated lower downforce rules package it used at Michigan and Kentucky earlier this season in Sunday's Pure Michigan 400 at Michigan International Speedway. The rules package developments are part of an industry-wide collaboration to further enhance the racing. Earlier this season, welded truck trailing arms and new brake cooling rules were put into place. The following updates to the rules package help to further reduce downforce and sideforce:

  • Reduce skew generated sideforce by setting rear toe to zero (same rule used in the NASCAR Sprint All-Star Race)
  • Aero package tweaks to reduce aero-generated downforce and sideforce
  • Spoiler shortened from 3.5 inches to 2.5 inches
  • Splitter reduced to 2 inches
  • Resize of deck fin to match spoiler

Team Penske has won every race where this package has been used this season. #22-Joey Logano triumphed in the June Michigan race, while #2-Brad Keselowski took the checkered flag at Kentucky. NASCAR

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