Technical Bulletins

Through the End of the 2023 Season: Both new & old Hoosier medium right rear tires are permitted.

Through the End of the 2023 Season: Any Hoosier left rear tire is permitted (including SC12, RD Series & D Series).

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Through May 15: Both new and old Hoosier Medium Right Rear tires are permitted.

After May 15:  Only new Hoosier Medium Right Rear tires are permitted.

Through June 30: Any Hoosier Left Rear tire is permitted.

Starting July 1: Only Hoosier SC12 Left Rear tire is permitted.

An amendment has been made to all three USAC National series:

Under Section 207, 307, and 407, titanium suspension parts to include torsion stops and torsion arms are permitted.

Through June 30: Both new & old Hoosier Medium right rear tires are permitted.

Through June 30: Any Hoosier left rear tire is permitted.

Starting July 1: Only new Hoosier Medium right rear tires are permitted.

Starting July 1: Only Hoosier SC12 left rear tire is permitted.

Through July 31: Both new & old Hoosier Medium right rear tires are permitted.

Through July 31: Any Hoosier left rear tire is permitted.

Starting August 1: Only new Hoosier Medium right rear tires are permitted.

Starting August 1: Only Hoosier SC12 left rear tire is permitted.

Update to Appendix D, Section 416.C – Ignition & Electronic Equipment

The Performance Electronics PE3 IG and IG2 ignition box is now permitted in USAC NOS Energy Drink Midget National Championship competition.

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