2024 Infiniti Tire Fitment Guide

2024 Infiniti coverage here centers on the Q50, which uses 225/50R18, 245/40R19, and 265/35R19. The 225/50R18 mounts on an 18-inch rim, while both 245/40R19 and 265/35R19 mount on 19-inch rims. Rim-width ranges are available for 225/50R18 at 6.0 to 8.0 inches, for 245/40R19 at 8.0 to 9.5 inches, and for 265/35R19 at 9.0 to 10.5 inches on applicable products.

That means year and make alone are not enough if you are replacing tires on a 2024 Infiniti Q50. You need to confirm whether the car has the 18-inch package or the 19-inch package, and if it uses staggered 19-inch sizing, the front and rear positions must be matched correctly. Checking the existing sidewall, wheel diameter, and factory door-jamb tire placard is the fastest way to confirm the right starting point.

On a 2024 Infiniti Q50, 225/50R18 is a metric radial size. The 225 is the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. For this size, BFGoodrich offers Blackwall tires, with W-rated versions and rim-width compatibility running from 6.0 to 8.0 inches.

That combination points to the Q50’s 18-inch setup rather than the larger 19-inch fitments. It is important because a 225/50R18 cannot be substituted onto a 19-inch wheel, and even among 18-inch tires you should still compare load index and tire series. Matching the sidewall code exactly is the cleanest way to keep the intended overall fit and avoid unnecessary clearance or calibration issues.

On a 2024 Infiniti Q50, both 245/40R19 and 265/35R19 are metric radial sizes built for 19-inch wheels. The first number is section width in millimeters, the second is aspect ratio, R identifies radial construction, and 19 is rim diameter in inches. The 245/40R19 uses a narrower tread section than the 265/35R19, and the two sizes also differ in approved rim-width range where that information is available.

Those differences matter because the two 19-inch sizes are not interchangeable simply because they share the same wheel diameter. A staggered Q50 setup may use one size at the front and the other at the rear, so you should verify position as well as size before replacement. The sidewall code on each tire and the placard information on the car will tell you whether your Q50 needs one uniform 19-inch size or a front-and-rear split.

2024 Infiniti Q50 tire coverage here is straightforward in sidewall appearance: 225/50R18, 245/40R19, and 265/35R19 are all available in Blackwall form. That suits the Q50’s modern sport-sedan character, where a clean, performance-oriented sidewall look is more typical than vintage-style whitewall treatment. The emphasis in this year and make is on size, load, and speed capability rather than on sidewall styling variation.

For most owners, that means the visual choice is simple and the more important comparison is between tire series within the correct size. If you are trying to preserve the car’s factory-style appearance, a Blackwall tire is consistent with how a contemporary Infiniti sedan is normally presented. Once the sidewall look is settled, your next checkpoints should be exact size, wheel diameter, and the speed rating appropriate for how the car is driven.

BFGoodrich covers all three 2024 Infiniti Q50 sizes here, with options in 225/50R18, 245/40R19, and 265/35R19. Nitto also covers the 265/35R19 size. Within BFGoodrich, the available series include g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, while Nitto’s 265/35R19 option is the NT555 G2.

That brand spread means buyers with the wider 19-inch Q50 fitment have the broadest comparison set, while the 18-inch and narrower 19-inch sizes stay within the BFGoodrich family. The practical move is to confirm size first, then compare series by speed rating, load index, and any rim-width limits that apply to your wheel. Brand matters, but it only matters after the exact fitment has been nailed down.

For the 2024 Infiniti Q50, BFGoodrich g-Force Sport Comp 2 and BFGoodrich g-Force Phenom T/A overlap in 225/50R18, 245/40R19, and 265/35R19, but they are not identical in published details. In 245/40R19 and 265/35R19, the Phenom T/A carries a Y speed rating to 186-plus mph, while the Sport Comp 2 carries a W rating to 168 mph. The Phenom T/A also shows published load-capacity figures of 1,709 pounds at 50 psi in 225/50R18 and 1,653 pounds at 50 psi in the two 19-inch sizes.

That makes the comparison less about appearance, since both are Blackwall radials, and more about matching the tire’s published capability to your wheel package and use. Owners who want a direct spec comparison should also look at wheel width compatibility where it is stated, especially on the 19-inch sizes. If you are choosing between the two, use the exact size on your Q50 as the first filter and the speed/load markings as the second.

Rim-width guidance for 2024 Infiniti Q50 tires varies by size. The 225/50R18 fits rims from 6.0 to 8.0 inches wide, the 245/40R19 fits rims from 8.0 to 9.5 inches wide, and the 265/35R19 fits rims from 9.0 to 10.5 inches wide on applicable products. All three sizes are radial, but each one is built around a different wheel-width window.

That is why matching the existing wheel matters just as much as matching the sidewall size code. Even when two tires share the same 19-inch diameter, the wheel-width requirement can still separate them. Before replacing a Q50 tire, confirm the wheel size already on the car and compare it against the approved range for the exact tire you are considering rather than assuming any 18-inch or 19-inch tire will suit the same wheel.

The 2024 Infiniti Q50 sizes here are modern radial tires in 225/50R18, 245/40R19, and 265/35R19, and none of the size markings indicate tube-type construction. These are contemporary passenger-car fitments intended for modern wheel applications rather than vintage tube-required designs. The buying focus for this year and make is on exact size, speed rating, load index, and wheel-width compatibility.

Even so, the wheel and valve condition still matter. A tubeless radial depends on the rim bead seat and valve stem sealing properly, so any corrosion, damage, or bent wheel should be addressed during installation. If a Q50 has aftermarket wheels, it is wise to confirm that the wheel is suitable for the tire size chosen and that the valve hardware matches the wheel’s design.

Original 2024 Infiniti Q50 wheels cannot be treated as universal across all three sizes, because 225/50R18 requires an 18-inch rim while 245/40R19 and 265/35R19 require 19-inch rims. The two 19-inch sizes do share wheel diameter, but they still differ in width requirements, with 245/40R19 fitting 8.0 to 9.5-inch rims and 265/35R19 fitting 9.0 to 10.5-inch rims on applicable products.

That means an original 18-inch Q50 wheel is only compatible with the 18-inch tire size, and a 19-inch wheel must still be checked for correct width before moving between the two 19-inch sizes. If your car uses a staggered arrangement, front and rear wheels may not be identical. Confirm wheel diameter and width at each axle position before assuming the same replacement tire can be used everywhere on the car.

A 2024 Infiniti Q50 should be stored on clean, properly inflated tires in a cool, dry space away from direct sunlight, electric motors, welders, generators, and other ozone-producing equipment. Modern radials handle static storage better than older bias-ply designs, but they still age from heat, UV exposure, and long periods without movement. Keeping the car on a clean surface and avoiding moisture buildup around the tires also helps preserve the rubber.

If the car sits for extended periods, move it occasionally so the load does not rest on the same contact patch for months at a time. Some owners use stands to reduce sustained loading during long-term storage, but if you do that, support the vehicle correctly and avoid leaving the suspension hanging improperly. A brief pre-drive pressure and visual check should be part of waking the car up after storage.

On a 2024 Infiniti Q50, tire life should be judged by age and condition as much as by mileage. A good rule is to begin paying closer attention once tires reach the five-to-seven-year range and to treat around ten years from the DOT date code as the point where replacement deserves serious consideration, even if tread remains. Heat cycles, storage conditions, alignment, and inflation habits can shorten that timeline.

That matters on low-mileage luxury and sport sedans because a tire can look usable while the compound and structure are already aging out. Check the DOT date code on each tire, not just the spare if one is present, and inspect for hardening, sidewall cracks, uneven wear, or repeated air loss. Replacement decisions should be based on the oldest tire in service, not simply the one with the most visible tread.

Tires on a 2024 Infiniti Q50 should be inspected before every drive and especially before any longer highway outing. Look for cuts, bulges, punctures, cracking, irregular wear, and pressure loss, and pay close attention to the inside shoulder area that is easy to miss on a performance sedan. The 19-inch sizes also deserve a close look for impact damage if the car has encountered potholes or rough pavement.

Regular inspections catch problems early, before they turn into vibration, poor handling, or a roadside failure. A monthly pressure check with the tires cold is a sensible routine even when the car is not driven often. If one tire repeatedly loses air, do not assume it is normal seepage; inspect the valve stem, wheel condition, and bead area so the underlying problem can be corrected.

The 2024 Infiniti Q50 tire options here are modern radial designs with highway-capable speed ratings. The available products carry W ratings to 168 mph and, in some 19-inch BFGoodrich Phenom T/A applications, Y ratings to 186-plus mph. Those ratings are far beyond normal U.S. highway use, but they still depend on proper inflation, correct load, sound wheel condition, and a mechanically healthy vehicle.

In real driving, the tire’s speed ceiling is only one part of the safety picture. Suspension condition, alignment, brake health, and the car’s overall maintenance state matter just as much on a modern sport-luxury sedan. Choose the exact tire size specified for your Q50, keep pressures correct, and avoid mixing unmatched sizes or ratings across an axle unless the vehicle was built around a staggered setup.

Inflation pressure on a 2024 Infiniti Q50 should follow the factory vehicle placard and owner’s manual for the exact wheel and tire package on the car. Tire-specific load figures here reach 1,709 pounds at 50 psi in 225/50R18 and 1,653 pounds at 50 psi in 245/40R19 and 265/35R19 on applicable products, but those are maximum load-and-pressure ratings for the tire, not a blanket vehicle setting.

That distinction matters because the correct running pressure for a Q50 is determined by the car’s weight distribution, suspension tuning, and OE fitment target, not by the tire’s maximum sidewall figure alone. Use the carmaker’s recommendation as the everyday baseline, then confirm that the tire you choose is appropriate for that application. If the car has aftermarket wheels or a non-stock size arrangement, review the setup carefully before settling on pressure.

Before a longer trip in a 2024 Infiniti Q50, inspect each tire for cracking, cuts, punctures, bulges, uneven wear, and proper cold inflation pressure. Confirm that the exact sizes on the car match the wheel package in use, especially if the vehicle runs 19-inch tires or a staggered front-and-rear combination. It is also wise to check the spare or mobility equipment, valve stems, and wheel condition before setting out.

A longer drive is the wrong time to discover an aging tire, a slow leak, or a rear tire that does not match the front setup. Tires are only one part of the pre-trip checklist, so include brakes, fluids, battery condition, and lights as well. If the car has recently struck a pothole or curb, add an alignment and wheel inspection to the list before putting sustained highway miles on it.