What should a mechanic inspect regarding the tires?

The focus during tire inspection should be on inflation, tread wear, and sidewall integrity. Proper inflation is crucial for maintaining good traction, fuel efficiency, and preventing excessive tire wear or potential blowouts. Tread wear is equally important because it directly affects the vehicle's ability to grip the road, especially in wet or slippery conditions. Inspecting the tread pattern for even wear patterns helps identify alignment issues and other mechanical problems. Sidewall integrity is critical as well; any cuts, bulges, or cracks can compromise the tire’s structural integrity and lead to failure while driving.

While the other options mention aspects that may be of interest, they do not address the key safety features that need regular consideration. The color and surface scratches may indicate cosmetic issues or damage but do not provide information on the tire's performance or safety. Rim size and design are more relevant to aesthetic or fitment considerations rather than the operational capability of the tire. Evaluating the brand and manufacturing date may tell you about the warranty or specific characteristics but does not assess whether the tires are in a safe operational condition. Therefore, focusing on tire inflation, tread wear, and sidewall integrity is essential for ensuring vehicle safety and performance.