"Back then the cars had a trap door that we could pull open with a chain to check our tire wear"

This quote by Tim Flock is referring to the vehicles he utilized to race in the 1950s. Back then, cars had a trap door situated on the underside of the car. This trap door was utilized to inspect the tire wear of the vehicle. It was opened by pulling a chain that was connected to the door. This was a common practice for race cars and truck drivers in the 1950s as it was necessary to inspect the tire wear of the vehicle before and after a race. This was done to make sure the vehicle was in excellent condition and the tires were not worn down too much. The trap door was a practical method to examine the tire wear of the vehicle without needing to raise the cars and truck up. It was a basic and reliable method to examine the condition of the car before and after a race.