2005 Saab 9-3 Owner's Manual - Page 244

242 Car care Tire markings An example of the meaning of the different markings in a tire size is given below for a tire size of 225/45 R17 94H: 225 Tire section width, mm 45 Aspect ratio, i.e. the section height as a percentage of the section width R Radial ply 17 Wheel rim diameter 17 in at bead seats 94 Tire load index H Speed rating Aspect ratio: A two-digit number that indicates the tire height-to-width measurements. For example, if the tire size aspect ratio is "55", as shown in item "C" of the illustration, it would mean that the tire´s sidewall is 55% as high as it is wide. Belt Rating: A letter code is used to indicate the type of ply construction in the tire. The letter "R" means radial ply construction; the letter "D" means diagonal or bias ply construction; and the letter "B" means beltedbias ply construction. Rim Diameter: Diameter of the wheel in inches. Load range: The load range represents the load carry capacity a tire is certified to carry. Speed Rating: The maximum speed that a tire is certified to carry a load. Speed ratings range from "A" to "Z". TIN-code a Manufacturer´s Identification Mark b Tire Size c Tire Type Code d Date of Manufacture Tire load indices 91 Tire approved for max. 1355 lbs. (615 kg) 93 Max. 1433 lbs. (650 kg) 94 Max. 1477 lbs. (670 kg) Speed ratings Tire approved for speeds up to 100 mph (160 km/h) Max. 112 mph (180 km/h) Max. 118 mph (190 km/h) Max. 130 mph (210 km/h) Max. 149 mph (240 km/h) Max. 168 mph (270 km/h) Max. 186 mph (300 km/h) Q S T H V W Y