Note that some classes are upgrades of entry-level classes. They have chassis and drivetrain modifications, but use the same body, so they look the same from the outside.
> STOCK (This is a recommended class for beginners)
> MODIFIED STOCK
> 17.5 BUGGY
> FACTORY STOCK (This is a recommended class for beginners)
> NASCAR
> NASTRUCK
> Traxxas Modified (This is a recommended class for beginners)
> STOCK MUD BOSS (This is a recommended class for beginners)