Seven-time Tour de France cycle champion Lance Armstrong will quit Astana and form a US-based team for next year.
The new outfit will be known as Team RadioShack and sponsored by the American electronics retail giant.
Armstrong says he couldn't be happier to be competing for an American team with the world's top cyclists, supported by the best coaches and staff.
The Texan returned to competition with Astana after a four-year retirement and is third overall in this year's Tour.
Earlier this year, doubts over the financial situation of Astana - which is bankrolled by an arm of the Kazakh government - led to fears the team would be barred from the Tour.
Armstrong's Astana team manager Johan Bruyneel, who guided him to his seven Tour wins, has made it clear he will be leaving the Astana after this season.