2009 Volvo C30 Owner's Manual - Page 169
2009 Volvo C30 Manual
Page 169 highlights
07 Wheels and tires Tire inflation Checking tire pressure Cold tires Inflation pressure should be checked when the tires are cold. The tires are considered to be cold when they have the same temperature as the surrounding (ambient) air. This temperature is normally reached after the car has been parked for at least 3 hours. After driving a distance of approximately 1 mile (1.6 km), the tires are considered to be hot. If you have to drive farther than this distance to pump your tire(s), check and record the tire pressure first and add the appropriate air pressure when you get to the pump. If checking tire pressure when the tire is hot, never "bleed" or reduce air pressure. The tires are hot from driving and it is normal for pressures to increase above recommended cold pressures. A hot tire at or below recommended cold inflation pressure could be significantly under-inflated. 2. Add air to reach the recommended air pressure 3. Replace the valve cap. 4. Repeat this procedure for each tire, including the spare. 5. Visually inspect the tires to make sure there are no nails or other objects embedded that could puncture the tire and cause an air leak. 6. Check the sidewalls to make sure there are no gouges, cuts, bulges or other irregularities. Speed ratings The speed ratings in the tables translate as follows: M = 81 mph (130 km/h), V= 149 mph (240 km/ h), W= 168 mph (270 km/h) See also page 172 for an explanation of the designations on the sidewall of the tire. NOTE • If you overfill the tire, release air by pushing on the metal stem in the center of the valve. Then recheck the pressure with your tire gauge. Some spare tires require higher inflation pressure than the other tires. Consult the tire inflation tables, see page 170, or see the inflation pressure placard. • 07 To check inflation pressure: 1. Remove the cap from the valve on one tire, then firmly press the tire gauge onto the valve. Load ratings The load ratings in the tables above translate as follows: 91 = 1365 lbs (615 kg), 93 = 1433 lbs (650 kg), 99 = 1709 lbs (755 kg) 169