The Grand Prix 4000 boasts global appeal as the best all round race bike tire on the market. Not only is it fast and super grippy, thanks to its state of the art Black Chili rubber compound, but it is also tough with a healthy tread layer and of course our Vectran™ anti puncture breaker layer underneath. German magazine TOUR has featured a comprehensive road tire test, covering many aspects of tyre performance, even including 'real time' wet grip where their human tester donned motorcycle leathers and pushed his specially adapted test bicycle to the limit on each different set of tires. The Continental GP4000s was a clear winner by performing well in all areas. The test was won in 2007, 2008, 2009. In the 650 size, this tire is only available in black.