NASCAR races usually happen on Sundays. However, that doesn't mean that the teams and the racers are idle for the rest of the week. What happens at a NASCAR race track on, say Wednesdays and Tuesdays?

Preparation is key to winning a race — that's why NASCAR teams start testing out their vehicles well before the actual races, usually on Wednesdays and Tuesdays.

Asked by Vasilii Kulev · Last updated 5 years ago · 76.1K views · SOURCE