These plains slope gently toward the east, those of the Amazon basin apparently lying in great terraces whose escarpments have the character of low, detached ranges of hills forming successive rims to the great basin which they partly enclose.
Magnetic clip-ons are available in a variety of styles and come in versions that are rimless as well as full rims.
If you are into the aesthetics of how your car looks, this game gives you that appearance customization with interchangeable rims, vinyls to stick on your car and various paints.
If you complete the full Underground mode, you will also unlock all body parts, all rims, all accessories, all paint colors, all decals, all vinyl, all neons, all NOS packages, all drivetrain packages, and all exhaust packages.
An interesting Easter egg, which isn't really a cheat code, is the ability to install rims that are too big for the car.