What types of vehicles do we check the "scrub" line on?

The "scrub" line is a critical inspection criterion that pertains specifically to street rods, specially constructed vehicles, and reconstructed vehicles. These types of vehicles often undergo modifications that can affect their structural integrity and safety. The scrub line refers to the area where the tire meets the road and is crucial for ensuring that the vehicle's stance and handling characteristics are suitable for safe operation.

In the context of vehicle inspections in Pennsylvania, checking the scrub line is particularly relevant for these modified vehicles because they may not adhere to standard manufacturing guidelines. By examining the scrub line, inspectors ensure that these vehicles can safely navigate roadways, considering any alterations that may have been made during their construction or reconstruction. This check is not typically performed on standard cars, commercial vehicles, or electric vehicles, as those adhere to more conventional design parameters.