'Cycling will never be 100% clean'

US cyclist Tyler Hamilton's career was entangled in controversy by blood doping scandals.

US cyclist Tyler Hamilton's career was entangled in controversy by blood doping scandals. Picture: sxc.hu

JOHANNESBURG - US Postal Service Team professional cyclist and author of The Secret Race: Inside the Hidden World of the Tour de France, Tyler Hamilton, admits he played up to the press portraying his scout image and the goofy smile.

Hamilton's career was entangled in controversy by blood doping scandals.

The former cyclist spoke to Sports Talk about his doping.

"Doping is controversial in cycling and now more and more in other sports because there is an increasing pressure to succeed at all costs."

He said it's important to speak about doping because if people are to learn from past mistakes they have to hear the "whole truth."

The former cyclist said he started before becoming part of Lance Armstrong's team.

"Armstrong took winning very seriously and that made the guys working with him take it serious as well."

Hamilton's first case came at the 2004 Olympics, when he was accused of blood doping by Olympic officials.

"I was planning to take the secret to my grave, but it was eating me up. I'm not proud of doping, but I'm proud of finally telling the truth."

Hamilton was allowed to keep his medal.