Hot Wheels Racing F1 Starting Grid ChallengeScale: 1: 64. Put yourself in the shoes of real F1 racing drivers with the Hot Wheels Racing Formula 1 Starting Line track set. Includes 2 Hot Wheels Formula 1 metal cars in 1: 64 scale so you can race head to head right away. (Teams may vary). Place two cars in the launchers, raise the lever on the starting tower and focus on the countdown. Then press the buttons to start racing. The chequered flag at the end of the track will declare the winner.