December 11 2012 Charlotte Motor Speedway NASCAR Generation Six Tuesday Morning Test Speeds Ryan Rantz Test Speeds Charlotte, Charlotte Motor Speedway, Drivers who tested at Charlotte, Gen6, Gen6 Test Speeds, Generation 6, Generation 6 Test Speeds, Generation Six, Generation Six Testing, lowes motor speedway, NASCAR, NASCAR off-season testing, Racing, Testing Speeds Speed Rank Driver Laps Run Best Lap 1 Jeff Burton 34 190.833 More