What is the name of the main antagonist in the first Cars movie?

The main antagonist in the first Cars movie is Chick Hicks.

Chick Hicks is a green stock car and Lightning McQueen’s principal rival in the Piston Cup season. He is obsessed with defeating Strip “The King” Weathers, the reigning champion, and views McQueen as a threat to his long pursuit of the championship. Chick’s aggressive driving and win-at-all-costs attitude make him the film’s central opposing force.

In the climactic race, Chick causes The King to crash while battling McQueen. McQueen then gives up the opportunity to claim the trophy alone and helps The King finish, allowing Chick to win the championship but leaving him widely condemned by the crowd. The moment contrasts Chick’s desire for victory with McQueen’s newly learned sense of sportsmanship.

The King, Doc Hudson, and Strip Weathers are not antagonists. The King is McQueen’s respected veteran rival, Doc is his initially unwilling mentor, and Strip Weathers is the racer Chick tries to surpass. Chick later appears in Cars 3 as a talk-show host.