The 2014 Infiniti Q70 sits in the modern luxury-sport sedan class, carrying forward the brand’s emphasis on strong road manners, crisp styling, and a more driver-focused feel than many full-size rivals. Tire selection on this car starts with identifying the wheel package, because the Q70 uses either 245/50R18 or 245/40R20 radial tires depending on configuration. That means the choice is not just about size, but also about sidewall profile and overall presentation. Available options include blackwall, raised white letter, and redline treatments across several radial series. For a stock car, matching the tire to the correct rim diameter is the first step before comparing style and road-use priorities.
Which Tire Size Is Right for The 2014 Infiniti Q70
The 2014 Infiniti Q70 uses two primary tire sizes, and the first thing to confirm is wheel diameter. One fitment is a 245/50R18 radial on an 18-inch rim, while the other is a 245/40R20 radial on a 20-inch rim. Because both sizes appear across the Q70 range, including some shared use between sub-models, selecting the right tire starts with verifying the exact wheel setup on the car.
The 245/40R20 size uses a 245-millimeter section width, a 40-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2014 Infiniti Q70, this lower-profile radial fitment suits cars equipped with the 20-inch wheel package and brings tire choice into a more appearance- and series-driven decision. Available options include BFGoodrich, Nitto, and Pro-Trac products, with blackwall, raised white letter, and redline sidewall treatments. This is the size to evaluate if the car already has 20-inch wheels and the goal is to keep that larger-diameter setup.
The 245/50R18 size means a 245-millimeter section width, a 50-series profile, radial construction, and fitment on an 18-inch rim. For the 2014 Infiniti Q70, it is the radial size used on 18-inch wheel applications, including the Hybrid and certain 3.7 and 5.6 configurations. Current choices center on Pro-Trac Street Pro III tires with either raised white letter or redline sidewall styling. This size is the right starting point when the car carries 18-inch wheels and the buyer wants to keep the existing rim diameter and tire profile.
Sub-model fitment on the 2014 Infiniti Q70 is mostly straightforward, but wheel package still matters. The 3.7 and 5.6 can use either of the two primary radial sizes, while the Hybrid stays with the 18-inch fitment, so confirming the exact sub-model and wheel setup helps narrow the choice quickly.
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2014 Infiniti Q70 3.7
The 2014 Infiniti Q70 3.7 can use either the 18-inch or 20-inch radial fitment, so tire selection starts with the wheels actually on the car. Once that is confirmed, the decision shifts to profile, sidewall style, and the available product series within the correct size.
The 2014 Infiniti Q70 5.6 also spans both primary tire sizes, making wheel-diameter confirmation essential before comparing tire options. After that, the main considerations are keeping the correct metric radial size and choosing among the available sidewall treatments and tire lines.
The 2014 Infiniti Q70 Hybrid uses the 18-inch radial fitment, which keeps tire selection more focused than on the other sub-models. That makes the choice less about identifying size and more about selecting the preferred sidewall presentation within the correct 245/50R18 format.
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 2014 Infiniti Q70 Tires for Sale
Available 2014 Infiniti Q70 tire choices center on radial fitments in 245/40R20 and 245/50R18, with BFGoodrich, Nitto, and Pro-Trac options depending on size. Buyers can compare tire series and sidewall presentation, including blackwall, raised white letter, and redline styles.
These FAQs focus on the two tire sizes used on the 2014 Infiniti Q70, how sub-model and wheel choices affect fitment, and what to compare when selecting radial tires for appearance, maintenance, and road use.
Tire Size & Fitment
What tire size fits a 2014 Infiniti Q70?
The 2014 Infiniti Q70 uses two primary tire sizes: 245/50R18 and 245/40R20. Both are radial sizes, and the correct one depends on the wheel package and sub-model. The Q70 3.7 and Q70 5.6 can use either size, while the Q70 Hybrid uses 245/50R18.
The key step is checking the actual wheels on the car before ordering tires. An 18-inch wheel requires the 245/50R18 fitment, and a 20-inch wheel requires the 245/40R20 fitment. If the car has aftermarket wheels or a changed suspension setup, confirm the tire size on the vehicle along with clearance and wheel compatibility.
What size rim does a 2014 Infiniti Q70 use?
A 2014 Infiniti Q70 uses either an 18-inch or 20-inch rim, depending on the tire size fitted to the car. The 245/50R18 tire is for an 18-inch rim, and the 245/40R20 tire is for a 20-inch rim. Both rim diameters appear across the Q70 lineup.
Rim diameter should be confirmed before looking at brands, series, or sidewall style. A tire marked for an 18-inch wheel cannot be used on a 20-inch rim, and the reverse is also true. It also helps to verify wheel width, especially on replacement or custom wheels, so the chosen tire matches the wheel setup already on the car.
Do all 2014 Infiniti Q70 sub-models use the same tire size?
No. The 2014 Infiniti Q70 lineup does not use one tire size across every sub-model. The Q70 3.7 and Q70 5.6 can use either 245/50R18 or 245/40R20, while the Q70 Hybrid uses 245/50R18. All of these are radial tire fitments.
That makes sub-model identification useful, but wheel diameter is still the deciding factor on the 3.7 and 5.6 models. A quick check of the wheel itself or the size molded into the current tire will usually settle the question. Staying with the existing rim diameter is the simplest path unless the car has already been converted to a different wheel package.
Choosing the Right Tire
What should I consider when choosing a 2014 Infiniti Q70 tire?
Start with the correct size for the wheel package: 245/50R18 for 18-inch wheels or 245/40R20 for 20-inch wheels. From there, compare radial construction details such as rim-width compatibility where stated, tire series, sidewall style, and any load information included with the product.
The right choice depends on how the car is used and how the owner wants it to look. Some buyers want a clean blackwall presentation, while others prefer raised white letters or a redline treatment. It also helps to match the tire choice to the car’s existing setup rather than assuming every Q70 uses the same profile or wheel diameter.
What sidewall styles are available for 2014 Infiniti Q70 tires?
Sidewall choices for the 2014 Infiniti Q70 include blackwall, raised white letter, and redline, depending on tire size and product line. The 245/40R20 size offers blackwall options along with Pro-Trac Street Pro III tires in raised white letter and redline. The 245/50R18 size is available in raised white letter and redline within the same Pro-Trac series.
Sidewall style is mostly an appearance decision once the correct tire size is established. Blackwall keeps a more understated modern look, while raised white letter and redline treatments create a more custom or enthusiast-oriented presentation. The important thing is choosing the style within the correct size and rim diameter rather than treating appearance options as interchangeable across wheel packages.
What brands offer tires for the 2014 Infiniti Q70?
Tires for the 2014 Infiniti Q70 are available from BFGoodrich, Nitto, and Pro-Trac. Brand choice depends partly on size, since the 245/40R20 fitment includes BFGoodrich, Nitto, and Pro-Trac options, while the 245/50R18 fitment shown here is centered on Pro-Trac offerings.
Brand is only one part of the decision. It still makes sense to compare the tire series available in the correct size, the sidewall presentation, and any rim-width or load details that matter to the car’s setup. On a Q70 with larger 20-inch wheels, there is simply more variety to compare than on the 18-inch fitment.
Restoration & Appearance
Which tire should I choose for a period-style 2014 Infiniti Q70?
A period-style approach on a 2014 Infiniti Q70 usually starts by keeping the wheel diameter and tire profile already associated with the car, either 245/50R18 or 245/40R20. From there, the visual character comes from the sidewall treatment and tire series rather than from changing construction, since both primary fitments are modern radials.
The most restrained look usually comes from a blackwall tire, while raised white letter and redline options create a more custom presentation. Because this is a newer collector-era sedan rather than an early classic, appearance choices often come down to how closely the owner wants to stay with the car’s original visual tone versus adding a more distinctive sidewall accent.
How does tire construction affect the appearance of a restored 2014 Infiniti Q70?
On the 2014 Infiniti Q70, construction has less effect on appearance than it would on an older bias-ply-era vehicle because the primary fitments are already radial. The more visible difference comes from the tire’s sidewall style and the profile tied to either the 18-inch or 20-inch wheel setup.
That means a restoration-minded owner usually gets the biggest visual change by choosing between blackwall, raised white letter, and redline options rather than by changing construction type. Keeping the correct size for the existing wheel package preserves the car’s intended proportions, while a mismatched profile can alter the look even if the tire technically shares the same section width.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Infiniti Q70?
Yes. Modifications can affect tire fitment on a 2014 Infiniti Q70 even when the tire size appears close to stock. 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 wheel opening.
A modified car should be checked for steering clearance, fender clearance, and wheel compatibility before replacement tires are chosen. That is especially important if the current setup differs from factory wheel diameter or width. Measuring the existing wheels and confirming the tire size already in use is a better approach than choosing by sub-model name alone.
What should I inspect before driving a 2014 Infiniti Q70 on new tires?
Before driving a 2014 Infiniti Q70 on new tires, inspect the wheels for damage, confirm that the new tires match the correct 18-inch or 20-inch rim diameter, and make sure inflation is set properly for the installed tires. It also helps to verify that there is no rubbing at full steering lock or over normal suspension movement.
A short road check is useful after installation to catch vibration, pulling, or unexpected contact early. It is also smart to recheck air pressure after the first drives and keep an eye on any signs of uneven wear. On a car with replacement wheels, that confirmation matters just as much as the tire size itself.
How often should tires on a 2014 Infiniti Q70 be inspected?
Tires on a 2014 Infiniti Q70 should be inspected regularly, especially if the car is driven infrequently or stored for long periods. Look for tread wear, cuts, sidewall cracking, bulges, and any gradual air loss. This applies equally to the 245/50R18 and 245/40R20 fitments.
Collector-minded or low-mileage cars can hide tire age because the tread may still look good even when the rubber is no longer in strong condition. A quick visual inspection before routine drives and a more careful inspection before longer trips is a sensible habit. Storage away from prolonged sun, heat, and ozone sources also helps preserve tire condition over time.
