Bono broke his arm in six places and fractured his eye socket, hand and shoulder blade in what he called a “freak accident” in New York.
In the letter to his fans, he said he was unable to move around physically and would have to “concentrate hard” to be fit for U2’s next tour.
At the time, the hospital where Bono was being treated said he had been involved in “a high-energy bicycle accident when he attempted to avoid another rider”.
The Irish rocker spoke this week about being on painkillers for weeks and said he had a “massive injury, I can’t blame on anyone but myself”.
The 54-year-old Dubliner revealed he now had a titanium elbow.