The series is sanctioned by Motorsport Australia, and run by a joint venture of the two Australian importers of Radical cars.
[1] The current Radical Cup Australia was founded in 2022, but one-make racing for Radical cars in Australia dates back to at least 2011.
[2] Unmodified examples of the Radical SR3 (including most variants from throughout the model's history, and both 1340 and 1500cc engined models) are eligible to compete.
[3] The series is made up of a mixture of sprint (25-minute) and endurance (45 or 50-minute races).
[3] Drivers are classified as Pro, Pro-Am or Am based on their age and professional experience in motorsport; there are multiple series trophies awarded, dependent on driver categorisation.