The 2017 Infiniti Trucks QX70 sits in the era when performance-oriented luxury crossovers leaned hard into aggressive styling, large wheels, and a more driver-focused character than many traditional SUVs. Its fastback profile and sporty stance make tire choice more than a maintenance detail, because wheel diameter and overall look both shape how the vehicle presents on the road. This QX70 uses radial tires in two primary sizes, 265/45R21 and 265/60R18, tied to different wheel diameters. That means the decision starts with confirming whether the vehicle is on 21-inch or 18-inch wheels, then choosing the right tire type, profile, and road-use balance for that setup.
Which Tire Size Is Right for The 2017 Infiniti Trucks QX70
The 2017 Infiniti Trucks QX70 uses two primary tire sizes, and the first step is confirming wheel diameter because the fitment splits between 21-inch and 18-inch rims. Both sizes are radial constructions, but they are not interchangeable simply because they share a similar overall diameter, so the correct choice depends on the actual wheel package on the vehicle.
265/45R21 is a metric radial size where 265 is the section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 21 is the rim diameter in inches. On the 2017 Infiniti Trucks QX70, this size supports the larger-wheel setup and contributes to the sharper, lower-profile look many owners expect from the model. The shorter sidewall changes the visual character compared with the 18-inch fitment, even though the overall diameter stays close. This is the size to evaluate when the QX70 is already equipped with 21-inch wheels and you want to keep that wheel-and-tire package properly matched.
265/60R18 is a metric radial size with a 265-millimeter section width, a 60-series aspect ratio, radial construction, and an 18-inch rim diameter. For the 2017 Infiniti Trucks QX70, this size belongs to the 18-inch wheel setup and uses a taller sidewall than the 21-inch alternative while maintaining a very similar overall diameter. That makes it a wheel-specific fitment rather than a larger or smaller tire choice in isolation. This size is the correct one to consider when the vehicle is on 18-inch wheels and you want to preserve the intended relationship between tire height, wheel diameter, and clearance.
Fitment is straightforward at the sub-model level because the 2017 Infiniti Trucks QX70 Base can use either of the two primary radial tire sizes, depending on wheel diameter. The important check is not trim level so much as confirming whether the vehicle is wearing 18-inch or 21-inch wheels before selecting tires.
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2017 Infiniti Trucks QX70 Base
The 2017 Infiniti Trucks QX70 Base uses either 265/45R21 or 265/60R18, both in radial construction, with the difference tied to the wheel package rather than a separate model family. Tire selection starts by matching the tire to the actual wheel diameter on the vehicle, then choosing a tire that suits the desired ride, appearance, and everyday road use.
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 for the 2017 Infiniti Trucks QX70 focus on the two factory-size radial fitments, wheel-diameter confirmation, tire selection priorities, and the practical checks that matter before putting the vehicle back into regular road use.
Tire Size & Fitment
What tire size fits a 2017 Infiniti Trucks QX70?
The 2017 Infiniti Trucks QX70 uses two primary tire sizes: 265/45R21 and 265/60R18. Both are radial tire sizes, and each belongs to a different wheel diameter, so the correct fitment depends on whether the vehicle has 21-inch wheels or 18-inch wheels.
Those two sizes have very similar overall diameter, but they are not the same fitment because the rim diameter is different. The practical first step is checking the wheel itself or the size already mounted on the vehicle, especially if it has seen replacement wheels or previous tire changes.
What size rim does a 2017 Infiniti Trucks QX70 use?
A 2017 Infiniti Trucks QX70 can use either an 18-inch rim or a 21-inch rim, depending on the wheel package on the vehicle. The 265/60R18 tire fits the 18-inch setup, while the 265/45R21 tire fits the 21-inch setup.
Rim diameter is the key fitment checkpoint on this model because it determines which tire size applies before anything else. A quick look at the current tire size, wheel markings, or the vehicle's actual wheel package will usually settle the question and prevent ordering a tire that matches width but not rim diameter.
Why does the 2017 Infiniti Trucks QX70 have more than one tire size?
The 2017 Infiniti Trucks QX70 has more than one tire size because it was fitted with different wheel diameters. One setup uses 265/60R18 on an 18-inch rim, and the other uses 265/45R21 on a 21-inch rim, with both remaining radial constructions.
That means the choice is driven by the wheel package already on the vehicle, not by guessing which tire looks closer in height. Since the 18-inch and 21-inch setups use different sidewall proportions, owners should confirm the actual wheels on the QX70 and check for any prior modifications before replacing tires.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Infiniti Trucks QX70?
Start with the correct size for the wheel package: 265/45R21 for 21-inch wheels or 265/60R18 for 18-inch wheels. Both are radial fitments, so the main selection factors are matching the installed wheel diameter, keeping the intended tire profile, and choosing a tire that suits how the QX70 is driven.
After size, look at practical details such as load suitability, tread style, and how the tire's profile supports the vehicle's appearance and road manners. A QX70 used mainly for highway driving may call for different priorities than one seeing rougher pavement, but the correct starting point is always the right wheel-and-tire combination.
How do I choose between the available 2017 Infiniti Trucks QX70 tire sizes?
You do not choose between 265/45R21 and 265/60R18 as interchangeable options; you choose the one that matches the wheels on the vehicle. The 21-inch setup uses the lower-profile 265/45R21, while the 18-inch setup uses the taller-sidewall 265/60R18.
Once wheel diameter is confirmed, the remaining decision is about tire type within that size rather than crossing between the two fitments. Owners should verify that all four wheels match, especially on a used QX70, because mixed replacements or aftermarket wheel changes can create confusion when it is time for a full set.
What does 265/45R21 mean on a 2017 Infiniti Trucks QX70?
On a 2017 Infiniti Trucks QX70, 265/45R21 means the tire is 265 millimeters wide, has a 45-series aspect ratio, uses radial construction, and fits a 21-inch rim. It is a modern metric radial size used on the larger-wheel QX70 setup.
Understanding that code helps prevent one of the most common ordering mistakes, which is focusing on width while missing the wheel diameter. The 21-inch fitment also carries a shorter sidewall than the 18-inch alternative, so it is worth confirming the current wheel package before replacing a single tire or an entire set.
Restoration & Appearance
Does correct tire fitment matter for a 2017 Infiniti Trucks QX70 restoration?
Correct tire fitment still matters on a 2017 Infiniti Trucks QX70, even though it is newer than a traditional collector car. The vehicle's stance and visual balance depend heavily on whether it is wearing the proper 18-inch or 21-inch wheel-and-tire package, because each uses a different sidewall profile.
For an appearance-focused refresh, start by deciding whether the goal is to preserve the current wheel setup or return the QX70 to the wheel diameter it originally carried. That approach keeps the tire choice grounded in the vehicle's actual presentation instead of mixing tire sizes that change the look without matching the wheel.
How does tire construction affect the appearance of a restored 2017 Infiniti Trucks QX70?
On the 2017 Infiniti Trucks QX70, construction is simpler than on older collector vehicles because the primary fitments are radial tires. The appearance difference comes less from bias-ply versus radial and more from whether the vehicle wears 265/45R21 on 21-inch wheels or 265/60R18 on 18-inch wheels.
That makes wheel diameter and sidewall proportion the real styling factors during an appearance-minded restoration or refurbishment. A lower-profile 21-inch setup gives the QX70 a more aggressive visual stance, while the 18-inch package shows more sidewall, so matching the tire to the intended wheel presentation is especially important.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Infiniti Trucks QX70?
Yes, modifications can affect tire fitment on a 2017 Infiniti Trucks QX70. Aftermarket wheels, changes in wheel width or offset, suspension lowering, or body alterations can all change how a 265/45R21 or 265/60R18 tire sits in the wheel opening and how much clearance remains at full steering lock.
A modified QX70 should be checked as an individual vehicle rather than treated like a stock example. Wheel diameter is only one part of the picture, so it is smart to verify clearance around the fenders and suspension and make sure all four wheels share the same basic fitment before mounting replacement tires.
What should I inspect before driving a 2017 Infiniti Trucks QX70 on new tires?
Before driving a 2017 Infiniti Trucks QX70 on new tires, confirm that the tire size matches the wheel diameter, inspect the wheels for damage, and make sure the tires are mounted and inflated correctly. It is also wise to look over alignment-related wear points if the previous tires showed uneven tread patterns.
A short check of suspension condition, steering response, and clearance can prevent early problems after installation. Owners should also keep an eye on air pressure during the first part of use and recheck for rubbing or unusual wear, especially if the vehicle has aftermarket wheels or a changed ride height.
What should I check before a longer drive in a 2017 Infiniti Trucks QX70?
Before a longer drive in a 2017 Infiniti Trucks QX70, check tire pressure, tread condition, and the sidewalls for cuts, bulges, or cracking. It is equally important to confirm that the vehicle is wearing the correct tire size for its wheel package, since the QX70 uses either 265/45R21 or 265/60R18.
Longer trips are a good time to catch problems such as slow air loss, uneven wear, or clearance issues that may not stand out during short local use. A quick walkaround, plus a check that all four tires match in size and general condition, helps the vehicle track properly and reduces surprises on the road.
