2003 Saab 9-3 Owner's Manual - Page 212

212 Car care Tire date code Tires should be regarded as perishable goods. As the tires age, the rubber becomes progressively harder, and the roadholding ability of the tires diminishes. This is particularly true on winter tires. Tires have a code that specifies their date of manufacture. The first two digits denote the week number and the last two digits the year. Accordingly, a date code of 3701 signifies that the tire was manufactured in week 37, 2001. Compact spare wheel WARNING The spare wheel or punctured wheel must be stowed under the trunk floor, and secured in place with the retaining nut. Compact spare The compact spare is light and easy to handle when changing the wheel. Its use is only permitted when a standard wheel has sustained a puncture. The maximum life of the wheel is only just over 2,000 miles (3,500 km). Do not exceed 50 mph (80 km/h) with the compact spare fitted. The tire pressure should be 60 psi (420 kPa). Put the punctured wheel in the spare wheel well under the trunk floor. Driving with the compact spare wheel, see page 167. Have the standard wheel repaired and refitted as soon as possible. Date code