2007 Nissan Quest Owner's Manual - Page 331
2007 Nissan Quest Manual
Page 331 highlights
7. H: Tire speed rating. You should not drive the vehicle faster than the tire speed rating. LDI0483 Example Michelin PAX Tire size (example: 225700R480A 100H) 1. Three-digit number (225): This number gives the width in millimeters of the tire from sidewall edge to sidewall edge. 2. Three-digit number (700): This number gives the outside diameter of the tire in millimeters. 3. R: The R stands for radial. 4. Three-digit number (480): This is the rim diameter in millimeters. 5. A: The "A" stands for asymmetric seating of the wheel and tire. 6. Two- or three-digit number (100): 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. Maintenance and do-it-yourself 8-35