LONDON - Red Bull's Mark Webber has disclosed that he raced the last four Grands Prix of the Formula One season with a broken shoulder and without telling his team he fell off a mountain bike in his native Australia in October.

The 34-year-old, who still has a pin in his leg after breaking the limb and shoulder in a cycling accident in Tasmania in November 2008, revealed the latest incident in a book Up Front - 2010, A Season to Remember published in Australia.

"I was riding with a great friend of mine. Suddenly he crashed right in front of me and I had nowhere to go but straight through the ears of the horse (over the handlebars)," Webber explained in the book.