How can I tell if my tires are directional and properly mounted/rotated?
Directional tires will have a rotation arrow branded on the tire's sidewall. The arrow indicates the direction in which the tire should turn.
Unless they are dismounted and remounted on their wheels to accommodate use on the other side of the vehicle, directional tires are to be used on one side of the vehicle and are intended to be rotated from the front axle to the rear axle. If different tire sizes are used on the front vs. rear axle, the tires become location-specific and prohibit tire rotation unless remounted.
What is the proper air pressure for my tires?
Proper tire air pressure is determined by the vehicle manufacturers and is set to best fine-tune a tire's capabilities to their specific vehicle make and model. The vehicle manufacturer's pressure recommendation can be found on the vehicle's tire information placard label, as well as in the vehicle owner's manual.
What is the correct load rating for my vehicle?
The load range (or load index) on a tire's sidewall helps identify its strength and ability to contain air pressure. Load ranges are identified in ascending alphabetical order for light truck/SUV tires (the further along the letter is in the alphabet, the stronger the tire and the greater amount of air pressure it can withstand and load it can carry)