What does backspace measure in terms of wheel specifications?

Backspace is defined as the distance from the mounting surface of the wheel to the back edge of the rim. This measurement is crucial for ensuring that the wheel will fit properly within the vehicle's wheel well, avoiding interference with suspension components or the body of the vehicle. Understanding backspace is essential for modifying vehicles with aftermarket wheels, as it helps determine how far the wheel sits inside or outside of the wheel well. Correctly measuring backspace contributes to overall vehicle safety, handling, and appearance.