2021 Infiniti Trucks reflects a modern luxury utility lineup built around comfort, road manners, and upscale presence rather than traditional pickup or commercial-duty themes. In this model year, the range centers on crossover and SUV applications, with the QX50 serving the midsize luxury role and the QX80 carrying Infiniti’s full-size flagship identity. Tire sizing varies by model rather than carrying across the full lineup, with four radial sizes spread between two vehicles and rim diameters ranging from 19 to 22 inches. Before choosing a tire for 2021 Infiniti Trucks, the first step is confirming whether you have a QX50 or QX80, since model identification determines the correct size family.
Which Tire Size Is Right for Your 2021 Infiniti Trucks
Four tire sizes apply to 2021 Infiniti Trucks, and they vary by model rather than being shared across the full range. All four are radial sizes, so the real decision starts with confirming the correct model and rim diameter first, then narrowing to the exact size used on that vehicle. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 2021|Fit(s): QX50|Construction: Radial|Rim: 20 in
255/45R20 is a radial metric size with a 255 millimeter section width, a 45-series aspect ratio, and fitment for a 20-inch wheel. This size is specific to the QX50 rather than universal across 2021 Infiniti Trucks, and it is available in BFGoodrich, Nitto, and Pro-Trac versions with Blackwall and RWL sidewall styles. Speed ratings vary by product, with W-rated options carrying a 168 mph ceiling. It suits QX50 owners who need the 20-inch factory size and want to choose among more performance-oriented radial offerings.
Year(s): 2021|Fit(s): QX50|Construction: Radial|Rim: 19-in rim
235/55R19 is a radial metric size with a 235 millimeter section width, a 55-series aspect ratio, and fitment for a 19-inch wheel. This size is specific to the QX50, separating it from the larger-diameter QX80 sizes used elsewhere in the 2021 Infiniti Trucks range. The practical takeaway is straightforward: a QX50 on 19-inch wheels needs this size family, so wheel diameter should be confirmed before moving on to a model-specific product choice. It is the correct path for owners keeping the QX50 in its 19-inch fitment configuration.
Year(s): 2021|Fit(s): QX80|Construction: Radial|Rim: 20-in rim
275/60R20 is a radial metric size with a 275 millimeter section width, a 60-series aspect ratio, and fitment for a 20-inch wheel. This size is specific to the QX80 and sits in a taller-profile 20-inch fitment than the QX50’s lower-profile options. The key buyer takeaway is that QX80 owners should confirm whether their SUV is on the 20-inch wheel package before choosing a tire, because this size does not interchange with the QX50 sizes. It is the right direction for a QX80 staying with its 20-inch wheel setup.
Year(s): 2021|Fit(s): QX80|Construction: Radial|Rim: 22-in rim
275/50R22 is a radial metric size with a 275 millimeter section width, a 50-series aspect ratio, and fitment for a 22-inch wheel. This size is specific to the QX80 and reflects the larger wheel package used on that model rather than a shared 2021 Infiniti Trucks fitment. The practical choice comes down to verifying that your QX80 actually carries the 22-inch wheels, since the rim diameter alone separates it from the 20-inch QX80 alternative. It is the correct size path for QX80 owners preserving the 22-inch factory wheel diameter.
Two 2021 Infiniti Trucks models are covered here. They do not share the same tire sizes, so identifying the model is essential before choosing a tire; the QX50 uses 19- and 20-inch fitments, while the QX80 uses 20- and 22-inch fitments. Select a model below for model-specific tire fitment history and products.
2021 Infiniti Trucks QX50
The 2021 Infiniti Trucks QX50 is Infiniti’s compact luxury crossover, aimed at buyers who want premium road manners and a more city-friendly footprint than a full-size SUV. Its tire fitments mount on 19-inch or 20-inch wheels depending on configuration, so wheel diameter is the first detail to confirm before narrowing to a specific tire.
The 2021 Infiniti Trucks QX80 is Infiniti’s large body-on-frame luxury SUV, known for its substantial presence and upscale touring role. Its tires mount on either 20-inch or 22-inch wheels, and that factory wheel diameter determines which of the two QX80 sizes applies.
Four products are available across four tire sizes for 2021 Infiniti Trucks vehicles. The 255/45R20 has four radial choices from BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL styles. Confirm your exact size first, since fitment varies by model and wheel diameter.
These FAQs cover how tire sizing differs between the 2021 Infiniti Trucks QX50 and QX80, what the metric size codes mean, how available sidewall and brand choices compare, and what to check for long-term use on a modern luxury SUV.
Size Basics & Fitment
What tire sizes fit 2021 Infiniti Trucks vehicles?
2021 Infiniti Trucks vehicles use four tire sizes across two models. The QX50 uses 235/55R19 and 255/45R20, while the QX80 uses 275/60R20 and 275/50R22. Those sizes span 19-, 20-, and 22-inch rim diameters, so the fitment question starts with identifying both the model and the wheel diameter already on the vehicle.
That matters because these sizes do not interchange across the full 2021 Infiniti Trucks range. A QX50 owner choosing between 19- and 20-inch tires is really confirming which wheel package is on the vehicle, and the same is true for a QX80 owner comparing 20- and 22-inch fitments. Check the tire sidewall currently on the vehicle and confirm it matches the wheel diameter before selecting a replacement.
What does 255/45R20 mean on a 2021 Infiniti Trucks tire?
On a 2021 Infiniti Trucks tire, 255/45R20 is a modern metric radial size. The 255 is the nominal section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 20 is the wheel diameter in inches. For 2021 Infiniti Trucks applications, this size belongs to the QX50 rather than the QX80.
That code tells you more than overall fit; it also separates one wheel package from another within the same model family. A QX50 wearing 20-inch wheels needs a 20-inch tire, and the lower-profile 45-series sidewall is part of that package. If the sidewall on your current tire reads 255/45R20, stay with that exact format unless you are making a deliberate wheel-and-tire change with full clearance and specification checks.
Do all 2021 Infiniti Trucks models use the same tire size?
No, 2021 Infiniti Trucks models do not use the same tire size. The QX50 uses 235/55R19 or 255/45R20, while the QX80 uses 275/60R20 or 275/50R22. Even though both models can appear with 20-inch wheels, the actual tire dimensions are different and are not interchangeable simply because the rim diameter matches.
That is why year and make alone are not enough for this page’s fitment question. A buyer needs to know whether the vehicle is a QX50 or QX80, then confirm whether it is on the smaller or larger factory wheel package for that model. Checking the existing sidewall code is usually the quickest way to narrow the choice before comparing brands or sidewall styles.
Buying the Right Tire
What sidewall styles are available for 2021 Infiniti Trucks tires?
Sidewall style variety appears in the 2021 Infiniti Trucks 255/45R20 size, where Blackwall and RWL options are both available. Blackwall keeps a contemporary, understated appearance that suits most late-model luxury crossovers, while RWL adds a raised white letter look that is more visual and sport-oriented. The other 2021 Infiniti Trucks sizes on this page are centered on straightforward modern radial fitments.
Appearance matters more here than originality, since a 2021 Infiniti Trucks application sits squarely in the modern era rather than a concours restoration context. QX50 owners using 255/45R20 can decide whether they want the cleaner OEM-style look of a Blackwall or the more assertive character of RWL lettering. If maintaining the factory visual theme is important, compare your current sidewall style before making the change.
What brands make tires for 2021 Infiniti Trucks vehicles?
For 2021 Infiniti Trucks fitments covered here, the 255/45R20 size is available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in both g-Force Comp 2 AS and g-Force Sport Comp 2 form, Nitto appears in the NT555 G2 line, and Pro-Trac appears with the Street Pro III. All of those are radial tires sized for the QX50 20-inch application.
Brand choice becomes relevant after the correct size is confirmed, not before. A QX50 owner on 20-inch wheels has several recognizable performance-oriented choices, while a QX50 on 19-inch wheels or a QX80 on 20- or 22-inch wheels needs to stay focused first on exact size fitment. Once the right size is established, compare sidewall style, speed rating, and any load details shown on the tire itself.
What is the difference between BFGoodrich and Nitto options for the 2021 Infiniti Trucks 255/45R20?
In the 2021 Infiniti Trucks 255/45R20 size, BFGoodrich and Nitto both offer radial tires with W speed ratings, which carry a 168 mph ceiling. BFGoodrich appears in g-Force Comp 2 AS and g-Force Sport Comp 2 versions, each weighing 32 pounds, while the Nitto NT555 G2 is slightly lighter at 31.97 pounds. BFGoodrich also carries a published rim-width range of 8.0 to 9.5 inches, and one BFGoodrich version includes a 1,819-pound load rating at 51 psi.
For a QX50 owner, that means the choice is less about basic fit and more about the finer details of product character within the same 255/45R20 envelope. Sidewall styling, series preference, and the wheel width already on the vehicle can help narrow the field. If you are comparing closely matched products, confirm the exact sidewall markings and wheel specifications before making the final selection.
Fitting & Setup
What rim width do 2021 Infiniti Trucks tires require?
Among 2021 Infiniti Trucks fitments here, the 255/45R20 has a published rim-width range of 8.0 to 9.5 inches. That range applies to the BFGoodrich versions in this size and provides a useful guide for the QX50 20-inch application. The other 2021 Infiniti Trucks sizes on this page do not need a guessed range added to them, because wheel diameter should be confirmed first and product-specific wheel guidance should always be checked next.
Rim width matters because the same nominal tire size can behave differently if mounted outside its intended wheel range. If your QX50 uses 255/45R20, verify that the wheel falls within the approved range for the exact tire you are considering. For the other sizes, use the sidewall size plus the manufacturer’s product specifications to confirm that the wheel and tire are matched correctly.
Do 2021 Infiniti Trucks tires require inner tubes?
The 2021 Infiniti Trucks 255/45R20 products shown here are modern radial tires without tube-type markings, which points to tubeless construction for that size. No tube requirement appears in the sidewall descriptions for those products. That aligns with normal late-model luxury crossover practice, where tubeless radial tires are standard unless a specialty wheel or tire explicitly says otherwise.
The practical step is to inspect the exact tire marking and the wheel condition before installation rather than assuming all products in every size follow one pattern. A clean, undamaged wheel bead and a proper valve stem are just as important as the tire itself on a tubeless setup. If a product ever carries a tube-type marking, follow that tire’s marking rather than generalizing from another size.
Maintenance, Storage & Longevity
How should I store a 2021 Infiniti Trucks when the tires are fitted?
A 2021 Infiniti Trucks vehicle should be stored on clean, properly inflated tires in a cool, dry space away from direct sunlight, electric motors, welders, furnaces, and other ozone-producing equipment. Moisture control matters, and so does keeping the tires out of standing water or prolonged contact with petroleum-based chemicals. Even modern radial tires benefit from a stable storage environment that protects the sidewalls and tread compound.
If the vehicle will sit for an extended period, move it occasionally to avoid maintaining the same contact patch for months at a time. Some owners also use tire cradles or stands when storage is especially long-term, provided the vehicle is supported correctly. Before returning a stored 2021 Infiniti Trucks vehicle to the road, inspect sidewalls, tread, and pressures rather than relying on appearance alone.
How long do tires on a 2021 Infiniti Trucks typically last?
Tires on a 2021 Infiniti Trucks vehicle should be evaluated by age as well as by tread depth. For collector-style or low-mileage use, five to seven years is a sensible point for closer inspection, and around ten years is the stage where replacement deserves serious consideration even if the tread still looks serviceable. The DOT date code on the sidewall is the most reliable starting point for understanding tire age.
That approach matters because many luxury SUVs accumulate time more quickly than mileage, especially when they are driven occasionally rather than daily. Heat cycles, sunlight, ozone exposure, and simple calendar age can matter as much as wear. If a 2021 Infiniti Trucks vehicle shows cracking, hardening, vibration, or irregular wear before those age markers, inspect and address the issue sooner rather than waiting for a mileage threshold.
How often should tires on a 2021 Infiniti Trucks be inspected?
Tires on a 2021 Infiniti Trucks vehicle should be inspected before every drive and more carefully before any longer trip. Look for sidewall cracking, cuts, punctures, bulges, uneven wear, and any sign that a tire is losing pressure. Because these are modern radial fitments, the inspection routine should also include valve stems, tread condition, and any vibration or pull that suggests wear or alignment issues.
A quick walk-around catches problems early, especially on an SUV that may carry family or highway-trip duty. Monthly pressure checks are worthwhile even when the vehicle appears to drive normally, and a seasonal inspection is a good time to look at age, balance, and alignment trends together. If one tire differs noticeably from the others in wear or pressure retention, investigate the cause before the next extended outing.
Safety & Road Use
Are 2021 Infiniti Trucks tires safe for highway driving?
2021 Infiniti Trucks tires in the 255/45R20 fitment include W-rated products, and a W rating carries a 168 mph ceiling. All sizes covered here are radial constructions, which aligns with the highway use expected of a modern luxury crossover or SUV. In real-world driving, the vehicle’s condition, alignment, load, and inflation pressure are usually more important than the tire’s ultimate speed ceiling during normal interstate use.
Safety still depends on using the exact size intended for the model and wheel package. A QX50 and QX80 may both use radial tires, but that does not make their sizes interchangeable. Before a highway trip, confirm pressure, inspect for damage, and make sure the tires are evenly worn and matched to the vehicle’s wheel diameter rather than assuming any close-looking size will be acceptable.
What inflation pressure should I use for 2021 Infiniti Trucks tires?
Inflation pressure for 2021 Infiniti Trucks tires should follow the vehicle placard or owner’s manual first, because factory pressure recommendations are tied to the vehicle’s weight distribution and intended use. Within the 255/45R20 fitment, one BFGoodrich option carries a maximum load of 1,819 pounds at 51 psi, but that figure is the tire’s rated maximum and should not be treated as the routine operating pressure for every application.
The practical rule is to use the vehicle manufacturer’s recommended cold pressure for day-to-day service, then compare it with the tire maker’s rating to stay within the tire’s limits. Do not transfer one pressure figure from a 255/45R20 to a 235/55R19, 275/60R20, or 275/50R22, because each size has its own load and pressure relationship. Recheck pressures whenever seasons change or the vehicle’s use pattern changes.
What should I check before taking a 2021 Infiniti Trucks on a longer drive?
Before taking a 2021 Infiniti Trucks vehicle on a longer drive, inspect each tire for cracking, cuts, punctures, bulges, irregular wear, and proper cold inflation pressure. Confirm that the size on the vehicle matches the wheel package in use, especially if the SUV could be on either of two factory diameters. Check the spare as well, since a neglected spare often becomes the weak link during a trip.
Tire condition is only one part of a sound pre-drive routine on a modern luxury SUV. It is also wise to check brakes, fluids, battery condition, suspension feel, and any warning lights before a highway outing. When the tires pass inspection and the vehicle is mechanically sorted, a 2021 Infiniti Trucks model is far more likely to deliver the quiet, composed road behavior buyers expect from the brand.
