2005 Nissan 350Z Owner's Manual - Page 239

6. Two- or three-digit number (94): This number is the tire's load index. It is a measurement of how much weight each tire can support. (You may not find this information on all tires because it is not required by law.) 7. H: Tire Speed Rating. The speed rating denotes the speed at which a tire is designed to be driven for extended periods of time. The ratings range from 98 MPH (miles per hour) to 186 MPH. (You may not find this information on all tires because it is not required by law.) SDI1607 the tire was built. For example, the numbers 3103 means the 31st week of 2003. 3 k Tire ply composition and material The number of layers or plies of rubbercoated fabric in the tire. Tire manufacturers also must indicate the materials in the tire, which include steel, nylon, polyester, and others. This number is the greatest amount of air pressure that should be put in the tire. Do not exceed the maximum permissible inflation pressure. This number indicates the maximum load in kilograms and pounds that can be carried by the tire. When replacing the tires on the vehicle, always use a tire that has the same load rating as the factory installed tire. Indicates that the tire requires an inner tube ("tube type") or not ("tubeless"). The word "radial" is shown, if the tire has a radial structure. Manufacturer or Brand name is shown. 4 k Maximum permissible inflation pressure 2 k TIN (Tire Identification Number) for new tire EXAMPLE 5 k Maximum load rating (example: DOT XX XX XXX XXXX) 1. DOT: Abbreviation for the "Department of Transportation". The symbol can be placed above, below or to the left or right of the Tire Identification Number. 2. Two-digit code: Manufacturer's identification mark 3. Two-digit code: Tire size 4. Three-digit code: Tire type code (Optional) 5. Three-digit code: Date of Manufacture 6. Four numbers represent the week and year 6 k Term of "tubeless" or "tube type" 7 k The word "radial" 8 k Manufacturer or Brand name 8-34 Maintenance and do-it-yourself