The 2018 Infiniti Trucks QX80 is a full-size luxury SUV built for buyers who wanted upscale road manners, substantial presence, and the carrying capacity expected from a truck-based utility vehicle. On a vehicle this large, tire fitment plays a major role in stance, ride character, and wheel appearance. The 2018 Infiniti Trucks QX80 uses radial tires in two primary sizes, 275/60R20 and 275/50R22, so the first step is confirming which wheel diameter is on the vehicle. Those two sizes keep a very similar overall tire height while pairing with different wheel presentations. That makes wheel verification especially important before comparing replacement tires for everyday road use or appearance.
Which Tire Size Is Right for The 2018 Infiniti Trucks QX80
The 2018 Infiniti Trucks QX80 uses two primary tire sizes, and the difference comes down first to wheel diameter. Both sizes are radial metric fitments, but one mounts on a 20-inch wheel and the other on a 22-inch wheel. Before choosing a replacement tire, confirm which wheel set is actually on the vehicle, especially if it has been changed from its original configuration.
The size 275/50R22 identifies a metric radial tire that is 275 millimeters wide, uses a 50-series aspect ratio, and fits a 22-inch rim. On the 2018 Infiniti Trucks QX80, this size supports the larger-wheel fitment and gives the vehicle a more wheel-forward appearance without a dramatic change in overall tire height. Buyers familiar with modern SUV sizing will recognize it as a current radial format rather than a vintage numeric or alphanumeric designation. This size is the one to evaluate when the QX80 is equipped with 22-inch wheels and the goal is to keep the same basic fitment profile.
The size 275/60R20 is a metric radial tire with a 275-millimeter section width, a 60-series aspect ratio, and a 20-inch rim diameter. For the 2018 Infiniti Trucks QX80, it delivers nearly the same overall tire height as the 22-inch fitment while pairing with a smaller wheel. That makes it a practical match for owners who want to preserve the vehicle's original wheel diameter and maintain the intended tire-to-wheel proportion. It is the correct size to consider when the QX80 is running 20-inch wheels and you want to stay with the primary radial fitment.
Sub-model fitment is straightforward here because the covered QX80 Base can use either of the two primary radial tire sizes. The important step is not trim identification so much as confirming whether the vehicle is riding on 20-inch or 22-inch wheels.
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2018 Infiniti Trucks QX80 Base
The 2018 Infiniti Trucks QX80 Base uses the same two primary radial fitments found across this page, with tire choice determined by wheel diameter rather than a separate construction type. That means the buying decision starts with verifying whether the SUV has 20-inch or 22-inch wheels before comparing replacement tires.
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
QX80 owners usually want clarity on which of the two metric radial sizes applies, how wheel diameter affects the choice, and what to inspect before putting a large luxury SUV back into regular road use.
Tire Size & Fitment
What tire size fits a 2018 Infiniti Trucks QX80?
The 2018 Infiniti Trucks QX80 uses two primary tire sizes: 275/60R20 and 275/50R22. Both are radial metric sizes, and both are associated with the QX80 Base. The key difference is wheel diameter, with one size fitting a 20-inch rim and the other fitting a 22-inch rim.
That means the right tire size depends on the wheels currently installed on the vehicle. A quick sidewall check on the existing tire or a direct measurement of the wheel diameter will confirm which fitment applies. This matters especially on used QX80s, where wheel packages may have been changed after the vehicle left the showroom.
What size rim does a 2018 Infiniti Trucks QX80 use?
A 2018 Infiniti Trucks QX80 uses either a 20-inch rim or a 22-inch rim, depending on which primary tire size is on the vehicle. The 275/60R20 tire fits the 20-inch wheel, while the 275/50R22 tire fits the 22-inch wheel. Both are standard metric radial fitments for this model.
Rim diameter needs to be confirmed before shopping because a 20-inch tire and a 22-inch tire are not interchangeable. Even though the two sizes have very similar overall height, they are built for different wheel diameters. Checking the actual wheel setup is the safest first step before comparing tread designs, brands, or road-use priorities.
Do all 2018 Infiniti Trucks QX80 sub-models use the same tire size?
The covered 2018 Infiniti Trucks QX80 Base can use both primary tire sizes shown for this model: 275/60R20 and 275/50R22. Both are radial fitments, so the variation is tied to wheel diameter rather than a switch between bias-ply and radial construction or a separate trim-specific tire design.
That makes fitment fairly simple, but it still requires a physical check of the vehicle. The sidewall size marking and the wheel diameter should match one another exactly. On a large SUV like the QX80, staying with the correct wheel-and-tire combination helps preserve proper clearance and avoids confusion when replacing only one tire or a full set.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Infiniti Trucks QX80?
Start with the correct primary size for the wheel on the vehicle: 275/60R20 for a 20-inch rim or 275/50R22 for a 22-inch rim. Both are metric radial fitments with a very similar overall height, so the main selection point is not overall stance but matching the tire to the actual wheel diameter in use.
After size is confirmed, compare the tire's intended road use, load suitability, and how the vehicle is equipped today. A QX80 with factory-style wheels may need a different replacement approach than one with aftermarket wheels. It also helps to think about ride preference, daily driving habits, and whether appearance or all-around utility is the higher priority.
How do I choose between 275/60R20 and 275/50R22 tires for a 2018 Infiniti Trucks QX80?
The decision between 275/60R20 and 275/50R22 is determined by wheel diameter, not by personal preference alone. The 275/60R20 size belongs on a 20-inch rim, and the 275/50R22 size belongs on a 22-inch rim. Both are legitimate primary fitments for the 2018 Infiniti Trucks QX80.
Because the two sizes are close in overall diameter, buyers sometimes assume they can be chosen interchangeably, but the wheel itself decides the fitment. Check the wheel size stamped on the rim or read the current tire sidewall before ordering replacements. That one step prevents a mismatch and keeps the next comparison focused on the right tire category.
What does 275/50R22 mean on a 2018 Infiniti Trucks QX80?
On a 2018 Infiniti Trucks QX80, 275/50R22 is a metric radial size. The 275 is the nominal section width in millimeters, 50 is the aspect ratio, R indicates radial construction, and 22 is the wheel diameter in inches. It is one of the two primary tire sizes used on this vehicle.
Understanding the code helps when comparing tires or checking what is already mounted on the SUV. It also makes it easier to distinguish the 22-inch fitment from the 20-inch alternative, 275/60R20. Since both sizes belong to the same model, reading the full sidewall code matters more than assuming fitment from the vehicle name alone.
Restoration & Appearance
Does correct tire fitment matter for a 2018 Infiniti Trucks QX80 restoration or refresh?
Yes, correct tire fitment still matters on a 2018 Infiniti Trucks QX80, even though this is a modern luxury SUV rather than a vintage restoration project. Using the proper 275/60R20 or 275/50R22 size keeps the vehicle aligned with the wheel diameter it was set up to use and preserves the intended tire-to-wheel relationship.
Appearance is a practical part of that decision because the 20-inch and 22-inch packages present the SUV differently. A careful refresh should begin by confirming which wheel setup belongs on the vehicle today, then selecting a tire that supports the same overall look and usable road fitment rather than mixing sizes across different rim diameters.
How does tire size affect the appearance of a 2018 Infiniti Trucks QX80?
Tire size changes the visual balance of the 2018 Infiniti Trucks QX80 because the model uses either 275/60R20 or 275/50R22. Both sizes are similar in overall height, but the 22-inch fitment shows more wheel and a shorter sidewall, while the 20-inch fitment keeps more visible sidewall around the rim.
That difference can shape the vehicle's final presentation even when the body and suspension remain unchanged. Buyers trying to preserve a familiar factory-style look should match the tire size to the wheel package already on the SUV. Confirming the current wheel diameter first keeps the appearance decision grounded in the correct fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Infiniti Trucks QX80?
Yes, modifications can affect tire fitment on a 2018 Infiniti Trucks QX80. Aftermarket wheels, suspension changes, altered ride height, or body modifications can all change how a 275/60R20 or 275/50R22 tire sits in the wheel opening. Even when the tire size remains one of the original options, wheel width and offset can still influence clearance.
A modified QX80 should be checked at full steering lock and through suspension travel before assuming the existing combination is still appropriate. Owners replacing tires on a used vehicle should verify the wheel diameter and inspect the actual setup rather than relying only on model-year fitment. That helps avoid rubbing, clearance issues, and mismatched replacements.
What should I inspect before driving a 2018 Infiniti Trucks QX80 on new tires?
Before driving a 2018 Infiniti Trucks QX80 on new tires, confirm that the installed size matches the wheel diameter and that all tires are inflated evenly to the vehicle's required specification. It also helps to inspect the wheels for damage, check valve stems, and make sure there is no obvious interference around suspension components or inner fenders.
A short, careful road test is worthwhile after installation. Listen for rubbing, watch for vibration, and recheck pressure after the tires have settled. On a heavy luxury SUV, proper installation and early inspection matter just as much as selecting the right size, especially if the vehicle has sat for long periods or recently changed wheel packages.
How often should tires on a 2018 Infiniti Trucks QX80 be inspected?
Tires on a 2018 Infiniti Trucks QX80 should be inspected regularly, not just when tread looks low. A monthly pressure check is a good routine, along with visual inspections for uneven wear, cracking, cuts, bulges, or slow air loss. That applies whether the vehicle uses 275/60R20 tires or the larger-diameter 275/50R22 setup.
Large SUVs place substantial demand on their tires, so catching wear or damage early is worthwhile. Extra attention is smart before a road trip or after long storage. Looking at the inside and outside shoulders, not just the center tread, can reveal alignment or suspension issues before they turn into premature tire wear or a poor highway ride.
