2019 Infiniti Tire Fitment Guide

2019 Infiniti vehicles use nine distinct tire sizes across four model lines: Q50 uses 225/55R17, 225/50R18, 245/40R19, and 265/35R19; Q60 uses 255/40R19, 255/35R20, and 275/30R20; Q70 and Q70L use 245/50R18 and 245/40R20. All of them are radial sizes. Rim diameters span 17, 18, 19, and 20 inches, so there is no single year-wide Infiniti fitment.

That means the first step is identifying the exact model and wheel package, not just the year and make. If your car already has tires mounted, compare the sidewall size marking to the wheel diameter on the car now. If you are restoring a factory wheel package or replacing a staggered setup, verify both front and rear sizes against the actual wheels before selecting a product.

On a 2019 Infiniti, 225/55R17 means the tire is 225 millimeters wide, the sidewall height is 55 percent of that width, the R indicates radial construction, and the tire fits a 17-inch wheel. That size appears on the Q50. Available examples include Blackwall performance radials and a Wide Whitewall radial, so the size code tells you the dimensions and construction, not the sidewall appearance.

For a Q50 owner, the practical takeaway is that two tires with the same 225/55R17 size can serve very different visual goals while still matching the same wheel diameter. One may look at home on a modern sport sedan, while another leans more toward a custom or stylistic build. Once the size is confirmed, compare the sidewall style and speed rating that best fit how your Q50 is used.

No, 2019 Infiniti models do not share one common tire size. The Q50, Q60, Q70, and Q70L each have their own fitment pattern, and only the Q70 and Q70L overlap, sharing both 245/50R18 and 245/40R20. The Q50 and Q60 each use sizes that are unique to those models within the 2019 Infiniti range.

That difference matters because a tire that fits one 2019 Infiniti model may be wrong in width, sidewall height, or wheel diameter for another. It is especially important when comparing the sport sedan and coupe lines, since their 19- and 20-inch packages can look similar at a glance. Confirm the exact model badge and the current wheel diameter before narrowing your tire search.

2019 Infiniti tire choices include several sidewall looks depending on size. Blackwall appears across most sizes, Wide Whitewall appears in 225/55R17 for the Q50, RWL appears in 245/40R20 for the Q70 and Q70L and in 245/50R18, and Redline appears in 245/50R18. Those sidewall treatments are cosmetic differences within the correct size, not changes to the basic wheel diameter or size code.

For most 2019 Infiniti owners, Blackwall will be the most natural visual match for the car’s original modern luxury-performance character. Whitewall, redline, and raised white letter options tend to push the look toward custom or personalized styling rather than factory-authentic appearance. Choose the sidewall style after you confirm the correct size, since the visual options are not available equally across every Infiniti model and wheel package.

2019 Infiniti vehicles are covered by BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich appears across most Q50, Q60, and Q70/Q70L fitments, Nitto covers selected 19- and 20-inch performance sizes such as 265/35R19, 255/35R20, 275/30R20, and 245/40R20, and Pro-Trac appears in 245/40R20 and 245/50R18. Brand availability is tied closely to the exact size, not just the model name.

That means a buyer should not start by choosing a favorite brand and then assuming it will exist in every 2019 Infiniti fitment. Some sizes have one brand, while others offer a broader mix with different sidewall looks and speed ratings. Once you know the exact tire size on your car, compare the available brands within that size rather than across the entire Infiniti range.

On several 2019 Infiniti sizes, BFGoodrich offers both g-Force Phenom T/A and g-Force Sport Comp 2 choices. In shared sizes such as 245/40R19, 255/40R19, and 255/35R20, the Phenom T/A carries a Y speed rating, while the Sport Comp 2 carries a W rating. Their weights also differ slightly by size, and where load information appears, both series remain in the same general performance-fitment range for that specific Infiniti application.

For the owner, the meaningful distinction is to compare the exact size, speed symbol, and any load figure that applies to the car’s wheel package. A Q50 or Q60 driver who wants one of these two BFGoodrich series should evaluate them within the same size code rather than treating them as interchangeable across different Infiniti models. That keeps the choice centered on the correct fitment first and the product variation second.

Several 2019 Infiniti sizes carry clear rim width ranges. 225/50R18 and 225/55R17 work with 6.0 to 8.0-inch rims, though one 225/55R17 whitewall version extends to 6.00 to 9.00 inches. 245/40R19 fits 8.0 to 9.5 inches, 255/40R19 and 255/35R20 fit 8.5 to 10.0 inches, 265/35R19 fits 9 to 10.5 inches, and 245/40R20 fits 8.0 to 9.5 inches.

Those ranges show why wheel confirmation matters even after the tire size is known. A correct diameter alone is not enough if the wheel width falls outside the approved range for the tire you are considering. If your 2019 Infiniti has aftermarket wheels, measure the wheel width directly or confirm the wheel specification before choosing a tire from one of the lower-profile 19- or 20-inch sizes.

The available 2019 Infiniti tire products are tubeless radial designs rather than tube-type tires. Several size markings include TL or modern ZR-style passenger tire nomenclature, which is consistent with contemporary tubeless construction. None of the 2019 Infiniti fitments here point toward an inner-tube collector application.

Even so, the wheel still needs to be in proper condition for tubeless use. Inspect the bead seats, valve stems, and wheel surfaces before mounting replacement tires, especially if the car has seen curb damage or corrosion. On late-model luxury cars like a 2019 Infiniti, air retention problems are more likely to come from wheel or valve issues than from any need for tubes.

Original 2019 Infiniti wheels cannot be treated as universal across all sizes, because the lineup uses 17-, 18-, 19-, and 20-inch tire diameters. A Q50 can use 17-, 18-, or 19-inch fitments depending on wheel package, the Q60 uses 19- and 20-inch sizes, and the Q70 and Q70L use 18- and 20-inch sizes. Tire diameter must match wheel diameter exactly.

That means an original wheel can only be reused with the tire sizes intended for that specific wheel diameter and suitable width range. If you are replacing tires on factory wheels, the simplest path is to read the current sidewall and confirm the wheel diameter cast or stamped on the wheel itself. If you are swapping wheels between Infiniti models, verify both the size code and the approved rim width before proceeding.

A stored 2019 Infiniti should be kept in a cool, dry garage away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can accelerate rubber aging. Keep the tires properly inflated during storage, and if the car will sit for extended periods, move it occasionally to change the contact patch. That helps reduce flat spotting, especially on low-profile performance radials.

If the car is parked for a season rather than driven regularly, clean the tires first and avoid petroleum-based dressings that can leave residue on the rubber. Long-wheelbase and heavier luxury sedans such as the Q70L can benefit from extra attention to storage pressure and periodic repositioning. Good storage habits preserve ride quality and sidewall condition long before tread wear becomes the reason for replacement.

Tires on a 2019 Infiniti should be judged by age as much as by remaining tread. A good collector and enthusiast rule is to begin evaluating them closely around five to seven years from the DOT date code, with replacement becoming a serious consideration as they approach roughly ten years, even if mileage is low. Heat cycles, storage conditions, alignment, and inflation history all affect service life.

That is especially important for a second car or fair-weather 2019 Infiniti that may look fine at a glance but spend long stretches parked. Check the date code on every tire, including the spare if one is present, and do not rely on tread depth alone. Aging can show up as hardening, fine cracking, or a loss of wet-weather confidence before the tire ever appears worn out.

Tires on a 2019 Infiniti deserve a quick inspection before every drive and a more careful inspection before any extended highway run. Look for cuts, bubbles, sidewall cracking, irregular shoulder wear, nails, and any sign that one tire is losing pressure faster than the others. On lower-profile 19- and 20-inch fitments, also pay attention to impact damage from potholes and curbing.

A routine check matters because performance-oriented luxury cars can hide tire problems until they show up as vibration, pull, or noise at speed. Monthly pressure checks are a good baseline, with an extra look after seasonal temperature swings. If one tire on your 2019 Infiniti shows unusual wear, have the alignment and wheel condition checked before replacing only the tire and assuming the problem is solved.

Yes, the available 2019 Infiniti tires are modern radial highway tires, and many carry W or Y speed ratings. W-rated products are rated to 168 mph, while Y-rated products are rated to 186 mph or higher. Those ratings are well beyond normal U.S. highway speeds, and they suit the luxury-performance character of the Q50, Q60, Q70, and Q70L.

Real-world safety still depends on condition, inflation, wheel integrity, and the car’s alignment more than the speed symbol alone. A damaged low-profile tire on a 20-inch wheel is a bigger concern than choosing between two properly matched tires with different high-speed ceilings. For highway use, focus on a fresh tire in the exact correct size and keep pressures and wear patterns under regular review.

Inflation pressure for a 2019 Infiniti should follow the factory vehicle placard or owner’s manual first, because the car’s recommended pressure is tied to its weight balance and wheel package. Where tire load data appears, examples include 1709 pounds at 50 psi for 225/50R18 and 245/40R20, 1819 pounds at 50 psi for one 225/55R17, 1764 pounds at 50 psi for 255/40R19, and 1609 pounds at 50 psi for one 255/35R20. Those figures are tire maximums, not default vehicle settings.

Do not transfer one tire’s pressure figure to another size, even within the same 2019 Infiniti model line. A Q50 on 17-inch tires and a Q60 on 20-inch tires may need very different operating pressures despite sharing the same make and year. Start with the placard recommendation, then confirm the tire maker’s guidance if you are changing to a different series within the correct size.

Before a longer trip in a 2019 Infiniti, inspect every tire for cracking, punctures, bulges, uneven wear, and visible tread damage, then confirm cold inflation pressure on all four corners. Check the valve stems, inspect the inner shoulder if possible, and make sure the spare or mobility equipment is present and usable. Low-profile 19- and 20-inch tires deserve extra attention because sidewall damage can be easy to miss from a standing view.

Tires are only one part of the broader pre-drive picture on a luxury-performance car. Also make sure the alignment feels stable, there is no steering vibration, and the brakes and suspension are in good order before committing to a high-speed interstate run. A careful walkaround before departure can catch a problem at home instead of turning it into a roadside interruption.