Infiniti Q50 Tires — Fitment by Year

The Infiniti Q50 is a rear-wheel-drive or all-wheel-drive sport sedan that competes in the entry-to-mid luxury segment. From its 2014 introduction through current model years, it has been offered with turbocharged four-cylinder and V6 engines, and in some trims, a high-output Red Sport configuration. Because the Q50 prioritizes handling precision and a composed ride, tire selection has a direct and noticeable effect on the driving experience — more so than on a truck or SUV where ride isolation and off-road capability take priority.

Tire sizing on the Q50 varies by model year and trim level. Base and Sport trims have historically used different rim diameters and width combinations, and the Red Sport 400 often ships with wider, lower-profile rubber than the base 3.0t. Common size families across the lineup have included 225/55R17, 245/45R18, and 245/40R19 fitments, though exact specs differ by year and configuration. Always confirm your specific year, trim, and whether the vehicle is RWD or AWD before ordering — these variables affect the correct size, speed rating, and load index.

Because the Q50 is a sport sedan, tire load rating and speed rating matter more here than on a family crossover. The Red Sport 400 in particular puts significant power to the rear wheels, so rear tires should meet or exceed the OEM speed rating — typically rated W (168 mph) or Y (186 mph) on performance-focused trims. Dropping to a lower speed rating than OEM is generally not recommended for sustained high-speed or performance driving. Load index should match or exceed the original equipment specification to maintain proper handling and safety margins.

For tire category selection, the Q50 is genuinely well-suited to performance all-season tires in most climates. A quality all-season in the correct size will handle dry and wet pavement effectively without sacrificing too much of the sedan's responsive character. In regions with significant snowfall, dedicated winter tires mounted on a second set of wheels offer a meaningful safety and traction advantage — the Q50's sport-tuned suspension and low-profile tire options can make it more sensitive to ice and packed snow than a taller-profile crossover. Summer performance tires are a reasonable choice for drivers in mild climates who prioritize grip, but they degrade quickly in cold temperatures and are not suitable for winter use.

Sidewall considerations are worth attention on the Q50. Trims equipped with 18-inch or 19-inch wheels use relatively low-profile tires, which provide sharper turn-in but less cushion against pothole impact. If your driving environment includes rough urban roads, selecting a tire with reinforced sidewall construction can help protect against impact damage. TPMS sensors are standard on all Q50 model years covered here — if you are purchasing a second set of wheels and tires for winter use, budget for compatible TPMS sensors to avoid dashboard warnings.

Before finalizing any tire purchase for your Q50, cross-reference the size printed on your current tire sidewall with your owner's manual and the door jamb placard. Trim-level differences, factory wheel upgrades, and regional market variations mean that two Q50s of the same model year can have different correct tire sizes. When in doubt, verify by year, trim, drivetrain, and installed wheel diameter.