2019 Infiniti Q70 Tires

The 2019 Infiniti Q70 uses two primary tire sizes: 245/50R18 and 245/40R20. Both are radial fitments, and both the 3.7 Luxe and 5.6 Luxe can use either size depending on the wheel package on the car.

That means the first thing to verify is actual wheel diameter, not just the sub-model name. An 18-inch wheel takes the 245/50R18 size, while a 20-inch wheel takes 245/40R20. If the car has had wheel changes at any point, checking the wheel itself before choosing a tire helps avoid ordering the right size for the wrong setup.

A 2019 Infiniti Q70 can use either an 18-inch or 20-inch rim, depending on which tire size is on the car. The 245/50R18 size pairs with an 18-inch rim, and the 245/40R20 size pairs with a 20-inch rim.

Because both wheel diameters appear across the covered Q70 range, rim confirmation is more important than assuming fitment from trim alone. Looking at the tire sidewall or measuring the wheel diameter is the safest starting point. Once the rim size is confirmed, it becomes much easier to compare the available tire series and sidewall styles in the correct fitment.

The covered 2019 Infiniti Q70 sub-models share the same overall tire-size pattern rather than using completely different fitments. Both the 3.7 Luxe and 5.6 Luxe can use 245/50R18 or 245/40R20 radial tires, depending on the wheel setup installed on the vehicle.

That makes sub-model identification less important than wheel confirmation. A buyer should still verify what is physically on the car, especially if it has seen dealership upgrades, aftermarket wheels, or previous owner changes. Matching the tire to the actual rim diameter is the key step before comparing construction details, sidewall appearance, or series differences.

Start with the correct primary size for the wheel on the car: 245/50R18 for 18-inch rims or 245/40R20 for 20-inch rims. From there, the main considerations are tire series, sidewall style, and any product details that affect compatibility, such as stated rim-width range or load capacity where those figures are given.

A practical choice depends on how the Q70 is used and how you want it to look. Some buyers prefer a straightforward blackwall presentation, while others want raised white letter or redline styling. It also helps to compare the actual product size markings and verify wheel width before finalizing a choice, especially on cars with non-original wheel setups.

Sidewall choices for the 2019 Infiniti Q70 include blackwall, raised white letter, and redline, depending on tire size and product series. The 245/40R20 fitment includes blackwall options as well as raised white letter and redline choices, while the 245/50R18 fitment includes raised white letter and redline options.

That gives the Q70 owner a meaningful appearance decision beyond simple size matching. Blackwall keeps a more understated modern luxury look, while raised white letter and redline treatments create a more customized visual character. Once the correct wheel diameter is confirmed, sidewall style becomes one of the easiest ways to tailor the car’s presentation without moving away from the proper tire size.

Tires for the 2019 Infiniti Q70 are available from BFGoodrich, Nitto, and Pro-Trac within the covered sizes. The 245/40R20 size has the broadest brand mix, while the 245/50R18 selection centers on Pro-Trac offerings in the Street Pro III series.

Brand choice should be considered alongside size, wheel diameter, sidewall style, and any product-specific dimensions or ratings that matter to your setup. Rather than focusing on the name alone, compare what each brand offers in the exact fitment you need. On this car, the most useful distinctions often come from series character and sidewall presentation, not just brand label.

A period-style choice for a 2019 Infiniti Q70 starts with keeping the correct modern radial size for the wheel on the car, then selecting a tire that supports the appearance you want. In this application, that usually means choosing between the 245/50R18 and 245/40R20 fitments first, then comparing blackwall, raised white letter, or redline options.

Because this is a recent luxury sedan rather than a restoration-era classic, appearance is less about historical originality and more about preserving or refining the car’s visual balance. The cleanest result usually comes from matching tire style to wheel size and overall presentation. A lowered car, aftermarket wheel, or altered stance should always be checked carefully before changing tire style.

On the 2019 Infiniti Q70, construction does not create a bias-ply-versus-radial appearance decision because the primary fitments here are radial. The visual differences come more from the chosen wheel diameter, the tire’s profile, and sidewall treatment such as blackwall, raised white letter, or redline.

That means appearance planning should focus on how the tire complements the car’s current wheels and intended look. The 20-inch fitment presents a shorter sidewall than the 18-inch option, while sidewall styling changes the tone from understated to more expressive. For owners pursuing a very specific presentation, checking photos, build references, or marque-community examples can be helpful before deciding.

Yes. Modifications can affect tire fitment on a 2019 Infiniti Q70 even when the tire size itself is correct for the wheel diameter. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering, or body modifications can all change how a 245/50R18 or 245/40R20 tire sits in the car.

That is why fitment should be checked on the actual vehicle, not assumed from model year alone. Steering clearance, inner-fender space, and suspension travel all matter once a car has been changed from stock form. A careful inspection before mounting new tires helps prevent rubbing issues and confirms that the chosen size still suits the Q70’s current setup.

Before driving a 2019 Infiniti Q70 on new tires, inspect wheel diameter, wheel condition, valve stems, and the basic match between tire size and rim. It also makes sense to confirm proper inflation, look for any mounting damage, and make sure the tires clear suspension and body components at full steering lock.

A short initial road test is useful after installation. Pay attention to vibration, pulling, unusual noise, or any sign of contact inside the wheelwell. The Q70’s two primary fitments are close in overall diameter but use different rim sizes, so this inspection is especially important if the car has changed hands before or has had wheel upgrades.

Tires on a 2019 Infiniti Q70 should be inspected regularly, not just when tread appears low. A visual check for uneven wear, cuts, sidewall damage, punctures, and pressure loss helps catch problems early, especially on a sedan that may see a mix of highway use, city driving, and long periods between close inspections.

Routine checks are even more important if the car has larger wheels, performance-oriented tires, or modified suspension. Looking at the tires before longer drives and during normal maintenance visits helps confirm that wear remains even and that nothing is rubbing. Keeping the correct inflation and addressing alignment or suspension issues promptly will also help preserve tire life.