AUSTIN, Texas — Lance Armstrong says racing in the Giro d'Italia in May is still "very doable" even though his broken collarbone is a bit more serious than first thought.

He says new tests show "multiple pieces" of broken bone. Armstrong will have surgery on Wednesday in Austin, and a metal plate will be inserted to stabilize his collarbone.

Armstrong said in a conference call Tuesday that he must rest for at least 72 hours before he can return to a training bike.

He crashed Monday in the first stage of the Vuelta of Castilla and Leon race in northern Spain.