The South Australian government believes it got value for money from bringing alleged drug cheat Lance Armstrong to Adelaide to ride in the Tour Down Under.

Premier Jay Weatherill says the government won't ask for appearance money paid to Armstrong to be returned despite the growing evidence that the American used drugs during his cycling career.

Nor will the government reveal how much the cycling star was paid.

Armstrong has been stripped of his seven Tour de France titles by the US Anti-Doping Agency (USADA) and banned from the sport for life after the organisation claimed he orchestrated the most sophisticated doping program ever seen.

The premier said the objectives the government and Tour Down Under organisers wanted to achieve by bringing Armstrong to Adelaide, which included the first race of his celebrated comeback to professional cycling in 2009, were achieved.

"It's had its profile raised. Its profile remains very prominent in the international community," Mr Weatherill told reporters on Monday.

"Our event stands very strongly, independent of these revelations.

"The Tour Down Under has an independent reputation for excellence among cyclists and the broader community."

Armstrong rode in the Tour Down Under three times between 2009 and 2011.

Before his first appearance, the race was worth about $17 million to the SA economy. By 2012, that had grown to more than $40 million.

Armstrong's Livestrong anti-cancer organisation also has an ongoing connection with Adelaide following this year's opening of the Livestrong Cancer Research Centre as part of the city's $28 million Flinders Centre for Innovation in Cancer.