2019 Infiniti Trucks Tire Fitment Guide

2019 Infiniti Trucks vehicles use eight distinct tire sizes across four models. The QX30 uses 235/50R18 or 235/45R19, the QX50 uses 235/55R19 or 255/45R20, the QX60 uses 235/65R18 or 235/55R20, and the QX80 uses 275/60R20 or 275/50R22. Available rim-width guidance appears for 235/50R18 at roughly 6.5 to 8.5 inches and for 255/45R20 at roughly 8.0 to 9.5 inches, depending on the tire.

That means year and make alone are not enough to choose correctly. You need the exact model and the wheel diameter already on the vehicle, because each model uses its own pair of sizes and there is no one-size fitment across the full 2019 Infiniti Trucks range. Checking the existing sidewall marking is usually the quickest way to confirm the correct starting point.

On a 2019 Infiniti Trucks tire, 235/50R18 is a modern metric radial size. The 235 is the section width in millimeters, 50 is the aspect ratio, meaning the sidewall height is 50 percent of the section width, R means radial construction, and 18 is the wheel diameter in inches. This size appears on the QX30 and uses an 18-inch rim.

Reading the code correctly matters because a tire with the same width but a different aspect ratio or rim diameter is not interchangeable. On a QX30, 235/50R18 is tied to an 18-inch wheel package, so moving to a 19-inch size such as 235/45R19 would require the matching wheel diameter as well, not just a tire change.

No, 2019 Infiniti Trucks models do not share one common tire size. The compact QX30, midsize QX50, three-row QX60, and full-size QX80 each have their own two-size range, and those fitments span 18-, 19-, 20-, and 22-inch wheel diameters. Every size is a radial, but the actual dimensions differ significantly from model to model.

That makes model identification the first decision, not tread pattern or brand. A QX80 owner, for example, is working in a very different size range than a QX30 owner, and even within a single model there are alternate wheel packages. If you are unsure, confirm the model badge and compare it to the current tire sidewall before moving ahead.

2019 Infiniti Trucks tire choices shown here are mostly Blackwall, which suits the modern luxury-crossover and SUV character of the QX30 and QX50 applications represented in the product range. The 235/50R18 appears in Blackwall only, while the 255/45R20 appears in both Blackwall and RWL form. RWL means raised white letters, which creates a more overt performance look than a plain black sidewall.

For most 2019 Infiniti Trucks owners, Blackwall is the more natural visual match because it aligns with late-model OEM styling. RWL can still appeal if you want a more expressive aftermarket look on a 20-inch application, but it changes the appearance noticeably. Sidewall style does not replace the need to confirm the correct size, load capability, and wheel diameter first.

BFGoodrich, Nitto, and Pro-Trac all have coverage within the available 2019 Infiniti Trucks product range here. The 235/50R18 is available from BFGoodrich and Nitto, while the 255/45R20 is available from BFGoodrich, Nitto, and Pro-Trac. Both covered sizes are radial performance-oriented modern fitments rather than vintage-style reproductions.

Brand choice becomes meaningful only after the correct size is confirmed for your exact model and wheel package. Once that is settled, you can compare details such as sidewall appearance, rim-width compatibility where published, and load or speed markings on the specific tire. That approach is more useful than starting with a brand name and trying to force it into the wrong fitment.

In 235/50R18 for the 2019 Infiniti Trucks QX30, BFGoodrich and Nitto both offer Blackwall radial choices with W speed ratings, which means a 168 mph speed ceiling. Published rim-width guidance falls in a similar range at about 6.5 to 8.5 inches. Nitto's NT555 G2 carries an XL 101W marking and a stated max load of 1,819 pounds at 50 psi, while BFGoodrich options in this size include both 97W and 101W versions, with stated max loads up to 1,819 pounds at 50 to 51 psi where that figure appears.

For a buyer, that means the practical differences are in the individual tire's specification details rather than a basic fitment difference. Compare the exact load index, pressure marking, and any XL designation against how your QX30 is equipped and used. Staying within the correct 235/50R18 size is the constant; the finer points come down to the specific product's construction details and intended character.

Published rim-width guidance for 2019 Infiniti Trucks tires appears on two covered sizes here. The 235/50R18 uses rims in roughly the 6.5- to 8.5-inch range, with one tire showing 6.5-(7.5)-8.5 as its approved span. The 255/45R20 uses roughly 8.0- to 9.5-inch rims where that specification is published.

Rim width matters because the correct tire size still needs the right wheel width to maintain proper profile and behavior. If your vehicle uses one of the other Infiniti sizes in this model-year range, confirm the actual wheel specification before assuming cross-compatibility. Matching the tire to both rim diameter and approved wheel width is the safer path than working from size code alone.

The available 2019 Infiniti Trucks products represented here are modern radials with no tube-type markings, and their format is consistent with tubeless passenger and SUV fitments. Nothing in these covered sizes indicates a tube-type application for the 235/50R18 or 255/45R20 products. That aligns with what you would expect from late-model luxury crossovers and SUVs using contemporary one-piece wheels.

Even so, the wheel itself still needs to be in sound condition, with a clean bead seat and a proper valve stem. If a wheel has been damaged, heavily corroded, or repaired, solve that issue before mounting a new tire. Tubeless design does not remove the need for a careful wheel inspection during installation.

A 2019 Infiniti Trucks model that came with two tire sizes typically used two different wheel diameters, not the same wheel with two interchangeable tires. The QX30 spans 18 and 19 inches, the QX50 spans 19 and 20, the QX60 spans 18 and 20, and the QX80 spans 20 and 22. Because the rim diameter changes, one size cannot simply replace the other on the original wheel.

That means you should treat each size as tied to its matching wheel package unless you are intentionally changing wheels as well. Before switching, confirm the wheel diameter stamped on the wheel or compare it with the tire sidewall already mounted. This avoids the common mistake of comparing overall tire size while overlooking the wheel itself.

A stored 2019 Infiniti Trucks should be kept out of direct sunlight and away from ozone-producing sources such as electric motors, compressors, battery chargers, and some shop equipment. Clean, dry concrete is better than damp ground, and maintaining normal inflation pressure helps the tire support the vehicle correctly during storage. Because every fitment here is a modern radial, long static periods can still create temporary flat spotting, especially in cooler temperatures.

Moving the vehicle periodically or slightly changing the tire's contact patch helps reduce stress in one spot. For longer storage, some owners also use tire cradles or stands as part of a broader preservation routine. The goal is to protect the casing and sidewalls from age-related damage long before tread wear becomes the deciding factor.

On a 2019 Infiniti Trucks vehicle, tire age is usually a more important guide than mileage once the vehicle becomes a lower-use luxury SUV or crossover. A sound rule is to begin careful age-based evaluation around five to seven years and to consider replacement as the tire approaches about ten years, regardless of remaining tread. The DOT date code on the sidewall tells you when the tire was made.

That matters because a tire can look serviceable at a glance yet still have age-related hardening, cracking, or reduced wet-weather confidence. Inspection history, climate, storage conditions, and heat exposure all affect how gracefully a tire ages. If your 2019 Infiniti Trucks sees occasional use rather than daily commuting, time-based review becomes especially important.

Tires on a 2019 Infiniti Trucks should be checked before every drive and again before any longer highway trip. Look for pressure loss, cuts, bulges, uneven tread wear, foreign objects, and sidewall cracking, and make sure the tread depth remains even across the tire. With modern SUV and crossover fitments, also pay attention to shoulder wear that can appear when alignment or inflation is off.

Frequent inspection is especially worthwhile on vehicles that alternate between long parked periods and occasional road use. A tire that seemed fine a month ago can develop a slow leak or visible damage while sitting. Building a quick walk-around into your routine catches most problems early and helps prevent a roadside issue that could have been avoided.

A 2019 Infiniti Trucks QX30 would have been fitted from new with modern radial tires in the same general format used across the current size options: metric sizing, low-profile proportions, and tubeless late-model construction. The two QX30 fitments in this model year are 235/50R18 and 235/45R19, each tied to its respective wheel package. There is no vintage-style or bias-ply authenticity question here because 2019 production fitment belongs firmly to the modern radial era.

For originality, the main concern is keeping the correct size, wheel diameter, and a sidewall appearance that suits the factory look. If the vehicle is being preserved to a highly original standard, compare the current size against the tire placard and consult Infiniti-specific owner communities for market-package confirmation. That is more useful than relying on generic crossover sizing assumptions.

Yes, correct tire fitment still matters when presenting a 2019 Infiniti Trucks at a judged event or marque gathering, even though the standards are different from those for older collector cars. Judges and knowledgeable enthusiasts will notice the correct size, overall stance, wheel diameter, and whether the sidewall presentation looks appropriate for a late-model luxury vehicle. An obvious mismatch, such as the wrong aspect ratio or an appearance that alters the factory character, can stand out quickly.

For a modern Infiniti, authenticity is usually less about reproduction period branding and more about preserving the intended visual balance and specification. Staying with the proper model-specific size is the strongest starting point, then choosing a sidewall style that matches the vehicle's original presentation. If event standards are strict, confirm expectations with the hosting club before finalizing a tire set.

In 255/45R20 for 2019 Infiniti Trucks applications, BFGoodrich options appear as Blackwall radials with 101W markings, while the Pro-Trac Street Pro III appears with an RWL sidewall and a 255/45ZR20 size marking. BFGoodrich publishes an 8.0- to 9.5-inch rim-width range on the examples shown here, while the Pro-Trac entry emphasizes sidewall styling more than additional dimensional detail. All of them are modern radial fitments for the same basic size and wheel diameter.

The practical difference is largely visual and spec-specific rather than one of basic compatibility. If you want a more understated, OEM-like appearance, Blackwall usually fits the late-model Infiniti look more naturally. If you want raised white letters for a more customized presentation, the Pro-Trac option changes the visual character while remaining in the correct 255/45R20 format.

Yes, the available 2019 Infiniti Trucks tire options shown here are modern radial designs intended for normal road use, and the covered 235/50R18 and 255/45R20 products carry W speed ratings with a 168 mph ceiling. Those ratings are well beyond ordinary U.S. highway speeds. In real use, the vehicle's condition, alignment, inflation, suspension health, and braking system matter at least as much as the tire's nominal speed capability.

Highway safety depends on using the correct size for the exact model and wheel package, then keeping the tires in good condition. A luxury crossover or SUV with aged tires, low pressure, or uneven wear can feel unsettled long before it reaches any rating limit. Treat the speed symbol as one part of the specification, not a substitute for regular inspection and maintenance.

Inflation pressure on a 2019 Infiniti Trucks should follow the vehicle manufacturer's placard or owner's manual for the exact model and tire size, not a one-number rule across the whole lineup. Some covered replacement tires also publish maximum load and pressure figures, such as 1,609 pounds at 51 psi and 1,819 pounds at 50 psi in 235/50R18, and 1,819 pounds at 51 psi in 255/45R20. Those figures are tire ratings, not blanket vehicle operating pressures.

The key is not to transfer pressure assumptions from one Infiniti model or size to another. QX30, QX50, QX60, and QX80 fitments differ, and the correct running pressure depends on the vehicle, axle loading, and intended operating condition. Set pressure when the tires are cold and revisit it whenever seasons change or the vehicle has been parked for an extended period.

Before a longer trip in a 2019 Infiniti Trucks, inspect every tire for visible cracking, cuts, punctures, bulges, and irregular wear, and verify cold inflation pressure against the correct vehicle recommendation. Check the spare as well, since many owners overlook it until it is needed. On wheel-and-tire packages with larger diameters and lower-profile sidewalls, even minor impact damage deserves attention before heading out.

Tire condition is only one part of a sensible pre-drive routine on a premium SUV or crossover. Also look at brakes, fluid levels, lights, and suspension condition so the vehicle's overall road manners match the tire's capability. A careful inspection before departure is easier and cheaper than discovering a problem after the trip has started.