Lightyear supplies Lightning McQueen’s racing tires in Pixar’s Cars.
Lightning’s tires carry the Lightyear branding, which is a fictionalized reference to the real Goodyear tire brand. The name also creates a visual joke within a world populated by cars, because “Lightyear” sounds like a futuristic distance or space-related term while functioning as a tire company.
Rust-eze is not Lightning’s tire supplier. It is the bumper-ointment sponsor whose sponsorship deal drives much of the first film’s Piston Cup plot. Dinoco is the major racing sponsor associated with The King and later with Lightning. The Piston Cup is the championship trophy, not a company.
Cars uses fictional brands such as Lightyear, Rust-eze, and Dinoco to build a recognizable advertising and racing environment. These labels appear on vehicles, signs, merchandise, and track elements, so identifying each one requires distinguishing sponsors, products, and competitions.