Biotech company Amgen has extended their contract for the Tour of California by two years, treatment according to Sports Business Daily.
The company which started sponsoring theevent since 2006.
The Amgen Tour of California is by far the biggest race in the United States with operating costs around US$12 million.
Another cycling event in the US include the Pro Cycling Challenge, viagra which will take place for the first time in Colorado, the USA’s cycling heartland, this month.
