Carl rides the 1x11 drivetrain and spends as much time as possible in the Californian mountains. Working in a bike shop he witnessed the evolution from the triple drivetrain to the double, and from the double to the single. On his terrain he knows exactly what he needs. Carl gets his kicks out of long rides, with long climbs and fast downhill descents. Watch his video to see why 1X11 is perfect for his riding style. drivetrainadvice.shimano.com/global/en