The 2019 Infiniti Q70L carries the long-wheelbase version of Infiniti’s full-size luxury sedan, blending modern road manners with the kind of extended-cabin comfort buyers expect from a premium four-door. For tire selection, that matters because the Q70L uses modern radial fitments in two distinct sizes: 245/50R18 and 245/40R20. Both 3.7 Luxe and 5.6 Luxe models can be found with either setup, so wheel diameter is the first thing to confirm before choosing tires. Once that is settled, the decision shifts to sidewall style, tire series, and whether the car’s look leans more understated Blackwall or toward a more custom presentation with RWL or Redline styling.
Which Tire Size Is Right for The 2019 Infiniti Q70L
The 2019 Infiniti Q70L uses two primary tire sizes, and the first step is confirming whether the car is on 18-inch or 20-inch wheels. Both the 3.7 Luxe and 5.6 Luxe can use either size, so this is a wheel-based fitment decision rather than a trim-only split. After that, the real choice becomes selecting the right radial tire style, brand, and sidewall treatment for the look and use you want.
A 245/40R20 tire uses a 245-millimeter section width, a 40-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2019 Infiniti Q70L, this is the lower-profile of the two primary fitments and keeps the car in a clearly modern radial sizing format. Available choices include BFGoodrich, Nitto, and Pro-Trac, with Blackwall, raised white letter, and Redline presentations across series such as g-Force Comp 2 AS, g-Force Phenom T/A, and Street Pro III. This size is the right starting point when the car is already equipped with 20-inch wheels and the goal is to compare style and product character within that setup.
A 245/50R18 tire also uses a 245-millimeter section width and radial construction, but pairs it with a 50-series profile on an 18-inch rim. For the 2019 Infiniti Q70L, it serves as the alternate primary fitment and should be matched to cars running 18-inch wheels rather than selected by appearance alone. In this size, the available choices center on Pro-Trac Street Pro III tires with raised white letter or Redline sidewall styling. It is the correct size to evaluate when the vehicle has the 18-inch wheel package and the buyer wants to choose between sidewall treatments without changing the core fitment.
Tire fitment is straightforward across the covered Q70L sub-models because both the 3.7 Luxe and 5.6 Luxe use the same two primary sizes. What matters most is confirming whether the car is on 18-inch or 20-inch wheels before comparing tires.
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2019 Infiniti Q70L 3.7 Luxe
The 2019 Infiniti Q70L 3.7 Luxe can use either of the two primary radial fitments, so tire selection starts with wheel diameter rather than engine badge. Once the 18-inch or 20-inch setup is confirmed, the focus shifts to choosing the sidewall style and tire series that best suit the car’s appearance and intended use.
The 2019 Infiniti Q70L 5.6 Luxe follows the same fitment pattern, with both primary radial sizes applicable depending on the wheel package on the car. That makes wheel confirmation the key first step, followed by comparing available product styles such as Blackwall, RWL, or Redline within the correct size.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2019 Infiniti Q70L Tires for Sale
Available 2019 Infiniti Q70L tires cover both primary sizes with radial choices from BFGoodrich, Nitto, and Pro-Trac. Depending on size, buyers can compare Blackwall, RWL, and Redline sidewalls across g-Force and Street Pro III series, with some 20-inch options also showing defined rim-width specifications.
Owners of a 2019 Infiniti Q70L usually need to sort out wheel diameter first, then compare radial tire options by size, sidewall style, and product series. The questions below focus on fitment, selection, appearance, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2019 Infiniti Q70L?
The 2019 Infiniti Q70L uses two primary tire sizes: 245/40R20 and 245/50R18. Both are radial fitments, and both the 3.7 Luxe and 5.6 Luxe can use either size depending on the wheel package installed on the car.
That means tire selection starts by confirming the actual wheels on the vehicle, not just the trim level on the decklid. A Q70L with 18-inch wheels needs the 245/50R18 fitment, while a car with 20-inch wheels needs the 245/40R20 size, so checking the wheel and current tire markings prevents ordering the right width in the wrong diameter.
What size rim does a 2019 Infiniti Q70L use?
The 2019 Infiniti Q70L uses either an 18-inch or 20-inch rim, matching its two primary tire sizes. The 245/50R18 fitment goes with an 18-inch wheel, and the 245/40R20 fitment goes with a 20-inch wheel.
Rim diameter is the most important fitment checkpoint on this vehicle because both sub-models share both tire-size possibilities. Looking at the current tire sidewall or measuring the wheel is the cleanest way to confirm what is actually on the car, especially if it has changed hands, received aftermarket wheels, or been upgraded from one factory-style wheel package to another.
Do all 2019 Infiniti Q70L sub-models use the same tire size?
Both 2019 Infiniti Q70L sub-models covered here, the 3.7 Luxe and 5.6 Luxe, share the same two primary tire sizes: 245/40R20 and 245/50R18. The fitment difference comes from wheel setup rather than from one sub-model having a unique tire size of its own.
That shared fitment makes the shopping process simpler, but it also means trim name alone is not enough to choose a tire. The practical step is to verify which wheel diameter is currently on the car, then compare tires within that size by sidewall styling, brand, and any rim-width guidance that applies to the product you are considering.
Choosing the Right Tire
What should I consider when choosing a 245/40R20 tire for a 2019 Infiniti Q70L?
A 245/40R20 tire for the 2019 Infiniti Q70L should first match the car’s 20-inch wheel setup, then be compared by construction details, sidewall appearance, and product series. In this size, choices include BFGoodrich, Nitto, and Pro-Trac options, with Blackwall, RWL, and Redline styling available.
The practical differences come down to how the tire looks on the car and how closely its specifications match the wheels already installed. Some 20-inch options also include defined rim-width ranges, so it is worth confirming wheel width before narrowing the choice further, especially if the Q70L is wearing aftermarket wheels rather than its original wheel package.
What sidewall styles are available for 2019 Infiniti Q70L tires?
The available sidewall styles for 2019 Infiniti Q70L tires include Blackwall, RWL, and Redline, depending on size and product line. Blackwall options appear in the 245/40R20 fitment, while both 245/40R20 and 245/50R18 can be found with RWL or Redline styling in the Pro-Trac Street Pro III series.
Sidewall style does not change the basic size requirement, but it does have a strong effect on the car’s visual character. A Blackwall look stays more understated, while raised white letter and Redline treatments push the Q70L toward a more custom or enthusiast-oriented presentation, so appearance can be a deciding factor once the correct wheel diameter and tire size are confirmed.
What brands offer tires for the 2019 Infiniti Q70L?
The 2019 Infiniti Q70L has tire options from BFGoodrich, Nitto, and Pro-Trac across its two primary sizes. The 20-inch fitment has the broadest assortment, while the 18-inch fitment centers on Pro-Trac Street Pro III choices.
Brand is best used as one part of the selection process rather than the only one. After choosing the correct size, compare each option by sidewall treatment, tire series, and any available wheel-width or load details that matter to your setup, since the most suitable choice depends on the car’s wheels, the look you want, and how the sedan will be driven.
Restoration & Appearance
Which tire should I choose for a period-style 2019 Infiniti Q70L?
A period-style choice for a 2019 Infiniti Q70L starts with retaining the correct primary size for the wheel package already on the car, then selecting a sidewall treatment that matches the look you want. Blackwall gives the sedan a cleaner luxury presentation, while RWL and Redline options create a more customized visual statement.
Because this is a late-model luxury sedan rather than an earlier restoration-era car, appearance choices usually center more on style than historical accuracy. The best approach is to preserve the proper size and wheel diameter first, then choose the tire series and sidewall that suit the Q70L’s overall character without forcing a mismatched diameter or profile onto the car.
How does tire construction affect the appearance of a restored 2019 Infiniti Q70L?
Tire construction is simple on the 2019 Infiniti Q70L because its primary fitments are radial, so the visual differences come more from profile and sidewall treatment than from bias-ply versus radial construction. In practice, the car’s appearance changes most through wheel diameter and whether the tire uses Blackwall, RWL, or Redline styling.
Keeping the correct radial size for the installed wheels helps the sedan maintain a balanced, modern stance. Appearance issues usually show up when the wrong diameter is chosen or when a very different sidewall style is selected without considering the overall look of the car, so construction is less of a visual question here than fitment and presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Infiniti Q70L?
Yes, modifications can affect tire fitment on a 2019 Infiniti Q70L even when the tire size itself is correct. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering, or body changes can all influence how a 245/40R20 or 245/50R18 tire sits in the car’s wheel openings.
A modified Q70L should be checked for clearance at full steering lock and through suspension movement before settling on a replacement tire. It also helps to confirm the exact wheel diameter and width already on the car, since a size that suits one setup may create rubbing or spacing issues on another, especially when the sedan no longer carries its original-style wheels.
What should I inspect before driving a 2019 Infiniti Q70L on new tires?
Before driving a 2019 Infiniti Q70L on new tires, inspect the wheels for damage, confirm that the tire size matches the wheel diameter, and make sure the tires are properly inflated. It is also smart to look over valve stems, check that the beads are seated correctly, and verify that no obvious suspension or alignment issue is present.
A careful walkaround after installation can catch preventable problems early. Watch for any sign of rubbing, vibration, or uneven stance once the car is on the ground, and recheck air pressure after the first short drive, since those simple steps help confirm that the new tires are matched to the Q70L’s wheels and are ready for normal road use.
How often should tires on a 2019 Infiniti Q70L be inspected?
Tires on a 2019 Infiniti Q70L should be inspected regularly, not just when replacement time arrives. Pressure, tread condition, uneven wear, cuts, bulges, and visible sidewall damage are all worth checking on a routine basis, especially on a luxury sedan that may alternate between short trips and extended highway use.
Consistent inspections matter even more if the car sees limited seasonal use or sits for stretches between drives. Checking the tires before longer trips and during normal cleaning or maintenance helps catch air loss or age-related issues early, and it gives you a chance to confirm that the 18-inch or 20-inch setup still has the clearance and wear pattern expected for the wheel package on the car.
