Legends of Spark Season 1 Episode 46 Storm Chase

Thunderstorms are a common occurrence in Tyretown, and the lightning rods invented by Spark are taken away by Bolt when Spark is distracted by work. Spark follows Bolt to the Four-Pole Racetrack, where he comes across Harry, who's also scouting out the track. The two of them race, and his focus on a target allows Spark to realize the secrets of speed, overtaking the thunderstorm.