Tailenders

On the planet Terulus, terraformers were used to reclaim the environment. However, a terraformer went haywire and has ravaged the planet for centuries. Due to the terraformer, mutations to wildlife and "stampedes," immense earthquakes, have occurred. This led to the giant, wheeled cities. One of the largest past times is a racing competition held on the wheeled cities. The goal is to beat the track records held by Loser King, who disappeared a century ago. Shiro, one of the top racers, is horribly injured by a stampede. As Shiro's condition seems to be hopeless, a mysterious woman walks in and offers him the chance to race again. Shiro must win the Planet Redevelopment Race and thus beat the Loser King.

(Source: Anime News Network)