Pinion, Pinion II, and Pinion III

Pinion, Pinion II, and Pinion III were three one-eyed motorcycles that tow the Royalty Castle to El Coche in the third film.

Role
In the ending, they tried to stop Mater and Papi from breaking out of jail, but they failed.

Trivia

 * Unlike the real Cars world, there are no motorcycles. Because of the Car's Life world, all of the cars have interiors with seats.
 * They and the Construction Crew are the only transport that are non-car vehicles.
 * They sound like "minions" but deep pitch. (this rhyming was actually mentioned by Struts asking they will be there soon.)
 * In the ending, they had 2 eyes and were bicycles, but don't worry, the movie is still good.
 * Actually for real there are 3 Pinions not 2.
 * Even though Struts asked that will be there soon, "minions" would imply that there are 2 or more than 1. (This was before I now noticed there were going to be 3 Pinions.)
 * They probably have tow hitches.
 * They originally were the bad guys, but they became the good guys in A Car's Life 16: Speedy Cock.