The 2014 Infiniti Trucks QX70 blends luxury-crossover comfort with the long-hood, performance-oriented character that made this model stand out in a crowded SUV field. Its sleek, road-focused stance means tire fitment is a meaningful part of both appearance and driving feel. This vehicle uses radial tires, but the correct size depends on the exact QX70 configuration, with 265/60R18, 265/50R20, and 265/45R21 all in the fitment picture. That makes wheel diameter the first thing to confirm, especially since the 3.7 and 5.0 do not share the same setup. Once the size is verified, the real decision becomes selecting the right tire within that fitment for road use, wheel compatibility, and overall presentation.
Which Tire Size Is Right for The 2014 Infiniti Trucks QX70
Three tire sizes apply to the 2014 Infiniti Trucks QX70, and they are tied to different wheel diameters and sub-model configurations. The first step is confirming whether the vehicle has 18-inch, 20-inch, or 21-inch wheels, then matching that to the exact QX70 sub-model and current wheel setup before choosing a tire.
A 265/50R20 tire is a metric radial size in which 265 refers to section width in millimeters, 50 is the aspect ratio, and 20 is the rim diameter in inches. On the 2014 Infiniti Trucks QX70, this is one of the radial fitments used on the 3.7 configuration and suits a modern performance-luxury crossover tire profile. Its dimensions keep it very close in overall diameter to the other QX70 sizes, but it must still match the actual wheel on the vehicle. This size is worth evaluating when the QX70 has the 20-inch wheel package and the goal is to preserve the intended wheel-to-tire relationship.
A 265/60R18 tire uses the same 265-millimeter section width as the other QX70 fitments, while the 60-series profile pairs with an 18-inch rim. This radial size appears on the 2014 Infiniti Trucks QX70 3.7 and reflects a taller sidewall than the 20-inch and 21-inch alternatives. Even though overall diameter stays close to the other factory-type fitments, the wheel diameter changes completely, so the tire choice starts with confirming the wheel itself. This size makes the most sense when the vehicle retains its 18-inch setup and the buyer wants to match that specific wheel package.
A 265/45R21 tire is a metric radial size with a 265-millimeter section width, a 45-series profile, and a 21-inch rim diameter. On the 2014 Infiniti Trucks QX70, this size is associated with the 5.0 configuration and gives the vehicle the lowest-profile fitment of the three primary sizes. The shared section width keeps sizing consistency across the range, but the 21-inch wheel requirement makes this a distinct fitment rather than a casual substitute for the smaller-rim options. This is the size to evaluate when the QX70 has its 21-inch wheels and tire selection needs to stay aligned with that setup.
Sub-model fitment matters on the 2014 Infiniti Trucks QX70 because the covered configurations do not all use the same tire size. The right tire choice starts with confirming whether the vehicle is a QX70 3.7 or QX70 5.0, then verifying the wheel diameter currently on the vehicle.
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2014 Infiniti Trucks QX70 3.7
The 2014 Infiniti Trucks QX70 3.7 uses two radial fitments, tied to 18-inch and 20-inch wheel setups. Tire selection for this sub-model starts with confirming which wheel package is on the vehicle, then choosing within that exact size rather than comparing it to the 21-inch 5.0 fitment.
The 2014 Infiniti Trucks QX70 5.0 uses a 265/45R21 radial tire, making it the only covered sub-model here with a 21-inch fitment. That keeps tire selection more straightforward, but the wheel diameter still needs to be confirmed before replacement, especially on vehicles with changed wheels or previous tire substitutions.
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.
Frequently Asked Questions
These FAQs focus on the exact tire sizes used on the 2014 Infiniti Trucks QX70, how fitment changes between the 3.7 and 5.0, and what to verify about wheel diameter, tire selection, and road-use readiness before replacement.
Tire Size & Fitment
What tire size fits a 2014 Infiniti Trucks QX70?
The 2014 Infiniti Trucks QX70 uses three possible tire sizes: 265/60R18, 265/50R20, and 265/45R21. The QX70 3.7 uses either 265/60R18 or 265/50R20 depending on wheel setup, while the QX70 5.0 uses 265/45R21. All of these are radial tire sizes.
The important part is that these sizes are not interchangeable by assumption just because their overall diameters are close. Start by confirming the exact sub-model and the actual wheel diameter on the vehicle, especially if it has changed hands, has aftermarket wheels, or has had previous tire replacements that may not reflect the original setup.
What size rim does a 2014 Infiniti Trucks QX70 use?
A 2014 Infiniti Trucks QX70 can use 18-inch, 20-inch, or 21-inch rims, depending on the tire size and sub-model configuration. The 265/60R18 tire fits an 18-inch rim, the 265/50R20 fits a 20-inch rim, and the 265/45R21 fits a 21-inch rim.
That makes wheel diameter the first thing to verify before ordering replacement tires. A quick look at the current sidewall may help, but the safer approach is to confirm the wheel itself, since a previous owner may have changed the wheels while keeping a tire diameter that still looked visually similar on the vehicle.
Why does the 2014 Infiniti Trucks QX70 have more than one tire size?
The 2014 Infiniti Trucks QX70 has more than one tire size because tire fitment varies by configuration and wheel package. The QX70 3.7 uses either 265/60R18 or 265/50R20, while the QX70 5.0 uses 265/45R21. Each size is built around a different rim diameter.
Even though the three sizes stay close in overall diameter, they are not selected the same way. The buyer needs to identify the sub-model first, then confirm the wheel diameter actually installed on the vehicle. That matters even more on used performance-oriented crossovers, where wheel upgrades and appearance changes are common.
Choosing the Right Tire
What should I consider when choosing a tire for a 2014 Infiniti Trucks QX70?
Start with the exact tire size and rim diameter used on the vehicle, because the 2014 Infiniti Trucks QX70 may have 18-inch, 20-inch, or 21-inch wheels. The next step is matching the tire to the correct sub-model and current wheel setup, since the 3.7 and 5.0 do not share all fitments.
After the size is settled, compare the tire's intended role with how the QX70 is driven. A road-focused luxury crossover like this benefits from a properly matched radial size, but wheel width, clearance, and any suspension or wheel changes should still be checked so the replacement tire works with the vehicle as it sits today.
How do I choose between the available 2014 Infiniti Trucks QX70 tire sizes?
The correct choice is not really between sizes in the abstract; it is between the sizes that match the actual wheel package on the vehicle. The 2014 Infiniti Trucks QX70 3.7 may use 265/60R18 or 265/50R20, while the 5.0 uses 265/45R21. Each size belongs to a different rim diameter.
That means the safest process is to verify the wheel first, then select a tire within that exact size. Moving from one of these fitments to another is not simply a matter of similar outside diameter, because wheel diameter, sidewall profile, and the overall relationship between tire and wheel all change with the size.
How do I choose between the available radial tire sizes for a 2014 Infiniti Trucks QX70?
All three primary fitments for the 2014 Infiniti Trucks QX70 are radial sizes, so the real difference is not construction type but wheel diameter and profile. The 18-inch, 20-inch, and 21-inch fitments all use a 265-millimeter section width, but each one is built for a different rim and sidewall proportion.
Choosing correctly comes down to matching the tire to the vehicle's existing wheel package rather than selecting by appearance alone. Once the proper size is confirmed, compare the replacement tire's fitment details against the current setup, especially if the QX70 has aftermarket wheels, altered ride height, or a replacement history that may have changed its original tire path.
Restoration & Appearance
Does correct tire fitment matter for a 2014 Infiniti Trucks QX70 restoration or preservation project?
Yes, correct tire fitment matters because the 2014 Infiniti Trucks QX70 uses specific radial sizes tied to distinct wheel diameters. Keeping the proper 18-inch, 20-inch, or 21-inch tire relationship helps preserve the vehicle's intended stance and proportions more effectively than choosing a size simply because it seems close.
For a preservation-minded vehicle, the first priority is confirming what wheel and tire setup belongs on that exact sub-model and what is actually on the vehicle now. If visual authenticity matters, pay close attention to the tire's sidewall profile and how it fills the wheel opening, since those details strongly affect the finished look.
How does tire profile affect the appearance of a 2014 Infiniti Trucks QX70?
Tire profile plays a visible role on the 2014 Infiniti Trucks QX70 because the vehicle uses the same 265-millimeter section width across three different sizes, but each size changes the sidewall height and wheel presentation. A 265/60R18 shows more sidewall, while a 265/45R21 creates a lower-profile appearance around a larger wheel.
That difference is important on a design-forward crossover like the QX70, where wheel-to-tire proportions contribute heavily to the overall look. Anyone trying to preserve the vehicle's intended appearance should confirm the correct wheel diameter first, then avoid substitutions that alter the visual balance even if the tire's overall diameter appears close.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Infiniti Trucks QX70?
Yes, modifications can affect tire fitment on a 2014 Infiniti Trucks QX70. Wheel changes, suspension lowering, altered offsets, or previous owner upgrades can all change which tire size works properly, even though the factory-style fitments stay within the 265 width family and close overall diameters.
That is why replacement starts with the vehicle as it currently sits, not only with the original fitment chart. Check wheel diameter, wheel width, clearance at full steering lock, and space around the fenders and suspension. Those steps are especially important on QX70 models wearing larger custom wheels or non-stock ride-height changes.
What should I inspect before driving a 2014 Infiniti Trucks QX70 on new tires?
Before driving a 2014 Infiniti Trucks QX70 on new tires, confirm that the installed size matches the wheel diameter and sub-model, then inspect inflation pressure, bead seating, valve condition, and visible clearance around the suspension and body. A short visual check can catch obvious issues before the vehicle goes back into regular use.
It also helps to recheck for rubbing with the steering turned both directions and to watch for any vibration during the first miles. On a used QX70, this is a good time to look over the wheels for damage and verify that prior modifications have not created a clearance issue that the old tires may have been masking.
How often should tires on a 2014 Infiniti Trucks QX70 be inspected?
Tires on a 2014 Infiniti Trucks QX70 should be inspected regularly, especially before longer drives and any time the vehicle has been parked for extended periods. Look for uneven wear, sidewall cracking, cuts, bulges, embedded debris, and gradual air loss, since even a low-use luxury crossover can develop tire issues with age.
A monthly pressure and condition check is a practical routine, with closer attention if the QX70 is driven infrequently or stored seasonally. Vehicles with larger wheel packages also benefit from routine curb-damage inspection, because a short sidewall leaves less visual margin when a wheel has taken an impact or a tire has been pinched.
