First of all, use a depth indicator to monitor tread wear and replace tires when the tread depth is minimal. Abnormal wear may be a sign of an alignment or balancing issue, requiring professional treatment. Look for cuts, punctures, or embedded objects and confirm suspected punctures using soapy water. A repairable puncture is fixable at the tire shop. Apply a vehicle's tire pressure gauge to ensure extended tire life, better gas mileage, and improved ride quality by maintaining proper air pressure levels. Check the pressure when tires are cold and set as needed. The spare tire should always remain properly inflated.