What indicates correct spacing for dual tires during an inspection?

The correct indication of proper spacing for dual tires during an inspection is that there should be no debris between them. When dual tires are spaced correctly, it ensures that they can operate effectively and prevents issues such as overheating or uneven wear. Debris trapped between the tires can lead to unwanted friction and potential tire damage. Clean spacing allows for optimal tire performance and safety, which is vital for vehicle stability and handling.

The other choices do not accurately represent the standards for dual tire inspection. Tires that touch each other may not create a space for venting and can lead to problems, while deflating duals can cause handling issues and is not part of a standard inspection. Uneven wear on dual tires can signal a problem with alignment or inflation and would not be considered a sign of correct tire spacing.