In Pixar's Cars, Lightning McQueen's rival wearing number 86 is Chick Hicks.
Chick Hicks is a green veteran stock car and one of the principal competitors in the film's Piston Cup season finale. His design and behavior present him as an aggressive racer who cares more about victory than sportsmanship.
The number 86 is part of his visual identity, while The King, the reigning champion, is identified by number 43. This distinction matters because all three racers compete for the same championship and appear together during the climactic race.
Chick's rivalry with McQueen is primarily competitive rather than personal at the beginning. His deliberate use of rough tactics contrasts with McQueen's eventual change in attitude, when friendship and responsibility become more important than winning at any cost.