A wheel spacer is basically a billet-aluminum disc that ranges in size from 5mm, to 45mm or larger, that is used to move wheels—not hubs—away from a truck's frame and body. See All 6 Photos ...

Wheel spacers can be a highly contentious topic. Many say that they are perfectly safe to use, while others insist that they will ruin your vehicle's handling, making it unsafe to drive. Which is true ...