The 2017 Infiniti Q70 carries the long-wheelbase, rear-drive sport luxury sedan formula into a period when many premium cars were moving toward sharper styling and larger wheel packages. It appeals to drivers who want a full-size Infiniti with a more traditional sedan character, but tire choice still matters because the Q70 uses two different radial fitments: 245/50R18 and 245/40R20. That means the first step is confirming the wheel setup on the car, especially across the 3.7, 5.6, and Hybrid sub-models. From there, the decision shifts to sidewall style, tire series, and whether a blackwall, raised white letter, or redline presentation best suits the way the car is driven and presented.
Which Tire Size Is Right for The 2017 Infiniti Q70
The 2017 Infiniti Q70 uses two primary tire sizes, and the correct choice depends first on the wheel diameter on the car. Both are radial metric sizes, but one fits an 18-inch rim and the other fits a 20-inch rim, so confirming the exact sub-model and wheel setup is the key step before comparing tire styles or product details.
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 2017 Infiniti Q70, this size represents the lower-profile of the two primary fitments and applies to certain 3.7 and 5.6 configurations rather than every Q70. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, raised white letter, and redline sidewall treatments across series such as g-Force Comp 2 AS, g-Force Phenom T/A, NT555 G2, and Street Pro III. It is the size to evaluate when the car already carries 20-inch wheels and the goal is to keep that wheel-and-tire relationship intact.
A 245/50R18 tire keeps the same 245-millimeter nominal width but uses a 50-series profile on an 18-inch rim, again with radial construction. For the 2017 Infiniti Q70, this size appears across the Hybrid and also on 3.7 and 5.6 versions equipped with the 18-inch wheel fitment. Product selection here centers on Pro-Trac Street Pro III tires offered with raised white letter or redline sidewalls, giving the buyer an appearance choice within the correct size. This is the size to confirm when maintaining the 18-inch setup and avoiding mismatches between tire diameter, wheel diameter, and the vehicle's existing wheel package.
Sub-model fitment on the 2017 Infiniti Q70 is straightforward in one sense and important in another. The 3.7 and 5.6 can use either primary size depending on wheel setup, while the Hybrid stays with 245/50R18, so confirming the exact sub-model and wheel diameter matters before choosing a tire.
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2017 Infiniti Q70 3.7
The 2017 Infiniti Q70 3.7 can use either of the Q70's two radial tire sizes, so tire choice starts with confirming whether the car has 18-inch or 20-inch wheels. Once that is established, the decision becomes one of sidewall style, brand, and series rather than guessing between unrelated fitments.
The 2017 Infiniti Q70 5.6 also spans both primary radial fitments, making wheel diameter the first thing to verify before selecting a tire. After that, the buyer can compare available product styles and series while staying within the correct size for the car's current wheel package.
The 2017 Infiniti Q70 Hybrid uses the 245/50R18 radial fitment, which keeps tire selection focused on one primary size rather than two. That simplifies the process, leaving sidewall appearance and product choice as the main decisions once the factory-style 18-inch wheel setup is confirmed.
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 2017 Infiniti Q70 Tires for Sale
Available 2017 Infiniti Q70 tires center on the two primary radial sizes, with choices from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare series such as g-Force Comp 2 AS, g-Force Phenom T/A, NT555 G2, and Street Pro III, along with blackwall, raised white letter, and redline sidewall treatments.
Common 2017 Infiniti Q70 tire questions usually come down to choosing between the 18-inch and 20-inch fitments, understanding which sub-models use each size, and comparing available radial tire styles, brands, and sidewall treatments.
Tire Size & Fitment
What tire size fits a 2017 Infiniti Q70?
The 2017 Infiniti Q70 uses two primary tire sizes: 245/50R18 and 245/40R20. Both are radial metric fitments, with 245/50R18 used on the Hybrid and also on some 3.7 and 5.6 configurations, while 245/40R20 applies to certain 3.7 and 5.6 versions equipped with 20-inch wheels.
The practical step is confirming the actual wheel diameter on the car before selecting a tire. A Q70 may share the same model name yet carry either an 18-inch or 20-inch setup, and choosing by model name alone can lead to the wrong size if the wheels have been changed or the exact sub-model is not verified first.
What size rim does a 2017 Infiniti Q70 use?
A 2017 Infiniti Q70 uses either an 18-inch or 20-inch rim, depending on the tire size fitted to the car. The 245/50R18 size belongs to an 18-inch rim, while the 245/40R20 size belongs to a 20-inch rim, and both fitments are radial.
Rim diameter is the first measurement to verify because the two primary Q70 tire sizes are tied to different wheels. It also helps to confirm wheel width and inspect whether the car still has its intended wheel package, especially if it was bought used or has aftermarket wheels that may have changed the original tire selection path.
Do all 2017 Infiniti Q70 sub-models use the same tire size?
No, not every 2017 Infiniti Q70 sub-model stays with one single tire size. The 3.7 and 5.6 can use either 245/50R18 or 245/40R20 depending on wheel setup, while the Hybrid uses 245/50R18, making it the more specific fitment among the covered sub-models.
That means sub-model name alone is helpful, but wheel diameter still decides the final tire choice on the 3.7 and 5.6. Checking the sidewall on the current tire or measuring the wheel before ordering avoids confusion, particularly on cars that may have been upgraded to larger wheels or changed for appearance reasons.
Choosing the Right Tire
What should I consider when choosing a 2017 Infiniti Q70 tire?
Start with the correct primary size for the car: 245/50R18 for the 18-inch setup or 245/40R20 for the 20-inch setup. From there, compare construction, sidewall style, tire series, brand, and any useful product details such as rim-width guidance or load information where it appears.
Appearance and use matter next. A blackwall option gives a more understated modern look, while raised white letter or redline sidewalls change the visual character of the car. Matching the tire to the existing wheel package, the way the Q70 is driven, and the presentation you want is usually more important than focusing on brand name alone.
What sidewall styles are available for 2017 Infiniti Q70 tires?
Sidewall choices for the 2017 Infiniti Q70 include blackwall, RWL, and redline, depending on the tire size and product line. The 245/40R20 fitment has blackwall options from BFGoodrich and Nitto, while Pro-Trac Street Pro III adds RWL and redline choices. The 245/50R18 fitment is available with RWL and redline in the Street Pro III series.
The best sidewall choice depends on how the car is presented. Blackwall tends to keep the Q70's appearance cleaner and more understated, while raised white letter and redline treatments add a more deliberate custom or enthusiast look. It still makes sense to choose sidewall style only after the correct tire size and rim diameter are confirmed.
What brands offer tires for the 2017 Infiniti Q70?
Tires for the 2017 Infiniti Q70 are available from BFGoodrich, Nitto, and Pro-Trac. Brand availability varies by size, with the 245/40R20 fitment offering the widest spread across multiple series, while 245/50R18 centers on Pro-Trac Street Pro III options.
Brand is only one part of the decision. It helps to compare which series and sidewall treatments each brand offers in the exact size your Q70 uses, especially if appearance is part of the goal. Looking at rim-width guidance and other product details can also be useful when the car has a non-stock wheel package.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Infiniti Q70?
A period-style 2017 Infiniti Q70 tire choice starts with keeping the correct primary size for the car's wheel setup, either 245/50R18 or 245/40R20. From there, the visual direction comes from the sidewall and series selection, since the available products range from understated blackwall designs to more expressive RWL and redline treatments.
The Q70 is modern enough that appearance usually comes down to preserving a clean luxury-sedan look or leaning into a more customized presentation. Matching the tire to the wheel diameter already on the car is essential, and owners seeking exact showroom-era detail should compare their choice against model-specific photos, brochures, or marque references.
How does tire construction affect the appearance of a restored 2017 Infiniti Q70?
On a 2017 Infiniti Q70, construction does not create a bias-ply-versus-radial appearance decision because the primary fitments are radial. The visible difference comes more from sidewall treatment and tire series than from construction type, especially in a vehicle from this era.
That makes blackwall, raised white letter, and redline the main styling choices when shaping the car's look. A blackwall tire keeps the presentation closer to a restrained luxury sedan, while RWL or redline adds a stronger enthusiast cue. The appearance decision should still follow the correct 18-inch or 20-inch fitment rather than lead it.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Infiniti Q70?
Yes, modifications can affect tire fitment on a 2017 Infiniti Q70 even when the tire size itself is one of the correct primary options. Aftermarket wheels, changes in wheel width or offset, suspension lowering, and body alterations can all influence how a 245/50R18 or 245/40R20 tire sits and clears the car.
A Q70 with non-stock wheels should be checked for wheel diameter, width, and clearance at the fender and steering range before a new set is chosen. Even if the sidewall size looks familiar, the full setup matters. That is especially important on the 20-inch fitment, where tire-to-wheel relationships tend to be less forgiving.
What should I inspect before driving a 2017 Infiniti Q70 on new tires?
Before driving a 2017 Infiniti Q70 on new tires, inspect the wheels for damage, verify the correct tire size for the wheel diameter, and confirm that each tire is seated and inflated properly. It also helps to look over suspension and steering components so the new tires are not being asked to work around worn hardware.
A short clearance check is worthwhile after installation, especially if the car has 20-inch wheels or any wheel and suspension changes. Watch for rubbing at full steering lock, uneven stance, or immediate pressure loss. Rechecking air pressure after the first few drives helps establish a stable baseline and can catch installation or valve issues early.
How should tires on a 2017 Infiniti Q70 be inspected and maintained?
Tires on a 2017 Infiniti Q70 should be inspected regularly for uneven wear, cuts, bulges, sidewall damage, and pressure loss. Because the car may use either an 18-inch or 20-inch setup, keeping the correct inflation and watching tread condition across all four tires is important to preserve ride quality and consistent road behavior.
Routine checks are especially useful on vehicles that are driven less often or stored for longer periods. Looking at the tires before a trip, maintaining proper pressure, and keeping the car away from prolonged heat, sunlight, and ozone sources can help protect the rubber over time. Any signs of cracking or persistent air loss deserve immediate attention.
