2004 Honda Civic Owner's Manual - Page 177

Tires Tubeless tires have some ability to self-seal if they are punctured. You should look closely for punctures if a tire starts losing pressure. You should get your own tire pressure gauge and use it whenever you check your tire pressures. This will make it easier for you to tell if a pressure loss is due to a tire problem and not due to a variation between gauges. Tire Inspection Every time you check inflation, you should also examine the tires for damage, foreign objects, and wear. You should look for: Bumps or bulges in the tread or side of the tire. Replace the tire if you find either or these conditions. Cuts, splits, or cracks in the side of the tire. Replace the tire if you can see fabric or cord. Excessive tread wear. When you see a 1/2 inch (12.7 mm) wide band running across the tread, there is less than 1/16 inch (1.6 mm) of tread left on the tire. Replace the tire if you can see three or more tread wear indicators around it. 174 Maintenance