Infiniti Q Tires — Fitment by Year

The Infiniti Q series, spanning 1992 through 2006, represents Infiniti's rear-wheel-drive luxury sedan lineup — a platform closely related to Nissan's Y30 and Y33 chassis architectures. Over this generation range, the Q45 was the flagship, offering a large V8 engine and a ride character that balanced sport and comfort. Tire selection for these vehicles directly affects how that balance is maintained, since the suspension tuning is calibrated around specific load and speed ratings. Choosing the wrong tire can dull the steering response or introduce unwanted harshness.

Tire sizing across the Q series varied by model year and trim level. Earlier models in the early-to-mid 1990s were often fitted with 215 or 225-width tires on 16-inch wheels, while later iterations moved toward wider 235 or 245-width fitments on 17-inch wheels. Before purchasing, always confirm your exact tire size from the placard located on the driver's door jamb or the owner's manual — do not rely solely on what is currently mounted, as previous owners may have deviated from the OEM specification.

For most Q series drivers, a high-performance all-season tire is the most practical choice. These tires maintain the composed, quiet ride expected of a luxury sedan while providing adequate wet and dry grip year-round. Look for speed ratings of H (130 mph) or V (149 mph) to match the performance envelope of the V8 powertrain. Load index is equally important — the Q45 is a substantial vehicle, and selecting a tire with an insufficient load index can compromise handling stability and longevity. Match or exceed the OEM load index when replacing.

If you drive in a region with significant winter precipitation, dedicated winter tires mounted on a second set of wheels are a worthwhile consideration. The Q series is rear-wheel drive, which makes it more susceptible to traction loss on snow and ice compared to all-wheel-drive vehicles. A purpose-built winter tire with a softer rubber compound and a siped tread pattern will substantially improve cold-weather safety. All-season tires, while convenient, are a compromise and should not be treated as a substitute for true winter rubber in severe conditions.

Sidewall choice also matters for this platform. Ultra-low-profile tires reduce the sidewall cushion that contributes to the Q's composed ride, and they are more susceptible to damage from potholes and road debris. If you are considering a wheel upgrade that requires a lower aspect ratio tire, calculate the overall diameter carefully to avoid speedometer error and interference with wheel well clearances. Maintaining the original overall diameter within a few percent is standard practice. When in doubt about which sizes are compatible with your specific year and trim, cross-reference with the door jamb placard and consult fitment verification tools before ordering.