2004 Honda Civic Owner's Manual - Page 176

Tires Tire Pressure Adjustment for High Speed Driving U.S. DX, HX and Canadian DX models only Honda strongly recommends that you not drive faster than posted speed limits and conditions allow. If you decide it is safe to drive at high speeds, be sure to adjust the cold tire pressures as shown below. If you do not adjust the tire pressure, excessive heat can build up and cause sudden tire failure. (U.S.: DX, HX, Canada:DX) Tire Size Cold Tire Pressure for speeds over 100 mph (160 km/h) When you return to normal speed driving, be sure to readjust the tire pressure for normal driving. You should wait until the tires are cold before adjusting the tire pressure. U.S. LX, EX and Canadian LX, Si models Use a gauge to measure the air pressure at least once a month. Even tires that are in good condition may lose one to two psi (10 to 20 kPa, 0.1 to 0.2 kgf/cm ) per month. Remember to check the spare tire at the same time. Check the pressure in the tires when they are cold. This means the vehicle has been parked for at least three hours, or driven less than 1 mile (1.6 km). Add or release air, if needed, to match the recommended cold tire pressures on page 173 . If you check the pressure when the tires are hot (driven for several miles), you will see readings 4 to 6 psi (30 to 40 kPa, 0.3 to 0.4 kgf/cm ) higher than the cold reading. This is normal; do not release air to match the cold pressure. CONTINUED Maintenance Tire pressure for high speed driving is the same as for normal driving. For convenience, the recommended tire sizes and cold air pressures are on a label on the driver's doorjamb. For additional technical information, see page 210 . P185/70R14 87S 35 psi (240 kPa , 2.4 kgf/cm ) 173