December 11 2012 Charlotte Motor Speedway NASCAR Generation Six Car Tuesday Afternoon Test Speeds Ryan Rantz Test Speeds Charlotte Motor Speedway Generation Six Car, Charlotte test speeds, Charlotte Testing Speeds, Gen6, Generation 6, Generation Six, Generation Six Car, Generation Six Test Speeds, NASCAR, off-season testing, Testing Speeds, Who tested at Charlotte Speed Rank Driver Laps Run Best Lap 1 Regan Smith (24) 31 More