The best indicator for tire service is often the result of a regular inspection of your tires. Have a good look at them once a month, and check for nails, low pressure, tread wear and overall appearance. Are your tires cracked and worn? Can you see a set of bands? These are wear indicators and if you spot them, it is definitely time for tire maintenance--get a new set of tires. Industry statistics show more people wash their cars than check tire pressure. If you are one of the guilty "non-checkers" it's definitely time for a good hard look at your tires. Tire maintenance isn't as painful as it sounds if you stay aware of the state of your tires.