USAC TECHNICAL BULLETIN
AUGUST 16, 2023
TIRE BULLETIN: USAC AMSOIL SPRINT CAR NATIONAL CHAMPIONSHIP
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).