Five street bikes that got dragged into the dirt — and started an entire category. From Steve McQueen's Great Escape Triumph to the Yamaha that basically invented the trail bike, these machines built off-road riding as we know it. Footage credits for every clip are shown on-screen throughout this video. Subscribe for more machines that started something bigger than themselves. #Motorcycle #Scrambler #YamahaDT1 #TriumphTR6 #VintageMotorcycles #OffRoad #DirtBike #MotorcycleHistory #RacingHistory #Motorsport #onelungracing