As NASCAR seeks a way for cars to drive back to pit road on flat tires, series officials will have drivers stay in their cars and be towed to pit road this weekend at Las Vegas Motor Speedway.
NASCAR used that policy last weekend at Auto Club Speedway. This is not viewed by competitors as a permanent solution because of the laps a driver loses when towed to pit road.
The issue with the Next Gen car is that it sits low to the ground. Combined with the larger wheel, there‘s no room for an inner liner, which was used previously and allowed cars to drive back to pit road on flat tires. Once the tires are flat, the Next Gen car rests of the bottom of the vehicle and can damage or destroy aerodynamic components there.
— NBC Sports —