Final answer:
When checking your tires during a pre-trip inspection, you should check the inflation, tread depth, and condition of the tires.
Step-by-step explanation:
When checking your tires during a pre-trip inspection, it is important to ensure that they are properly inflated, have sufficient tread depth, and are free from any damages or abnormalities. To check the tire pressure, you can use a tire gauge and compare it to the recommended pressure specified by the manufacturer. The tread depth can be measured using a tread depth gauge, and it should be above the minimum legal limit for safe driving. You should also inspect the tires for any cuts, bulges, or uneven wear, as these can indicate potential issues that need to be addressed.