Armstrong's dream for 'magic' formula

Lance Armstrong admitted on Monday he still lacked the "magic ratio" to leave riders trailing after failing to convert a promising breakaway in the Tour Down Under's build-up race.

Armstrong said he needed extra strength and less weight after his attack, alongside fellow Tour de France winner Oscar Pereiro, was snuffed out with three laps to go.

"If I were a little lighter ... then we would have a different conversation. Ultimately you have to be as strong as possible and as light as possible," he said, reports AFP.