![Iron Will](https://image.tmdb.org/t/p/w185/6Ujbtp0NklUoQ67s32HyW6R5540.jpg)
Life for the bike citizens is idyllic, until one day, a new and surprising gizmo, the gas engine, comes to town. What follows is a thrilling, hilarious adventure, that will see Speedy the mountain bike become the unwitting leader of a group of environmental activists, who are determined to stop the gas engine from polluting their unspoilt haven.