2018 Lincoln Trucks Tire Fitment Guide

2018 Lincoln Trucks vehicles use 11 sizes spread across four models. The MKC uses 235/45R19, 245/45R19, 255/40R20, and 235/50R18; the MKT uses 235/55R19 and 255/45R20; the MKX uses 245/50R20, 265/40R21, and 245/60R18; and the Navigator uses 285/45R22 and 275/55R20. These are all radial sizes, and the rim diameters span 18, 19, 20, 21, and 22 inches depending on model and wheel package.

That means there is no one-size-fits-all replacement for 2018 Lincoln Trucks. Before choosing a tire, confirm the exact model and then verify the wheel diameter already on the vehicle, since several models use multiple sizes and some share similar section widths while mounting on different rims.

On a 2018 Lincoln Trucks tire, 245/45R19 is a metric radial size. The 245 is the nominal section width in millimeters, 45 is the aspect ratio, meaning the sidewall height is 45 percent of the section width, R identifies radial construction, and 19 is the wheel diameter in inches. For this year and make, that size applies to the MKC.

Reading the code correctly helps you avoid mixing up tires that may look close on paper but fit different wheels. A 245/45R19 must mount on a 19-inch wheel, and it should be matched to the same overall size strategy your MKC was equipped with rather than substituted casually for one of its 18- or 20-inch alternatives.

No, 2018 Lincoln Trucks models do not share one common tire size. The compact MKC, three-row MKT, midsize MKX, and full-size Navigator each have their own fitment range, and every size in this group applies only to a specific model rather than across the entire lineup. Even within a single model, more than one wheel-and-tire package may be correct.

That makes model identification the first step in getting the right tire. If you already know the year and make but are still comparing sizes, check the door placard or confirm the current wheel diameter before moving on, especially on vehicles like the MKC and MKX that were offered with several different rim sizes.

2018 Lincoln Trucks tire options shown here are mostly Blackwall radials, which suit the clean, contemporary appearance expected on late-model Lincoln crossovers and SUVs. The one notable sidewall variation appears in 255/45R20 for the MKT, where both Blackwall and raised white letter choices exist. The other product-covered sizes here stay in Blackwall form.

For a factory-like look on a 2018 Lincoln Trucks vehicle, Blackwall is usually the more natural visual match. A raised white letter tire can change the character of the vehicle noticeably, so sidewall style is worth deciding up front if you are fitting an MKT in 255/45R20 and care about keeping the appearance close to original luxury-SUV presentation.

BFGoodrich, Nitto, and Pro-Trac appear in the currently covered 2018 Lincoln Trucks sizes. BFGoodrich and Nitto are present in 245/45R19 and 235/50R18 for the MKC, BFGoodrich alone appears in 255/40R20 for the MKC, and BFGoodrich, Nitto, and Pro-Trac all appear in 255/45R20 for the MKT. Every product represented here is a radial tire.

Brand choice within a correct size often comes down to the look you want, the speed rating you need, and the specific wheel package on your Lincoln. Start with the exact size and rim diameter, then compare the available brands inside that size rather than trying to cross-shop a tire from one model’s fitment into another model with different dimensions.

In 235/50R18 for 2018 Lincoln Trucks MKC applications, BFGoodrich appears in multiple series and Nitto appears in the NT555 G2. All are Blackwall radials with W speed ratings, and the rim width range shown for both brands centers on 6.5 to 8.5 inches. Load figures where stated reach 1,819 pounds at 50 psi for the Nitto and one BFGoodrich option, while another BFGoodrich entry shows 1,609 at 51 psi.

The practical difference is less about basic fitment and more about selecting the specific series characteristics you prefer within the same size. Once you know your MKC uses 235/50R18, compare the exact product specs on load rating, service description, and wheel-width compatibility rather than assuming every tire in that size is interchangeable in detail.

Rim width guidance is available for several of the 2018 Lincoln Trucks sizes with product coverage. The 245/45R19 products fit rims from 7.5 to 9.0 inches, 235/50R18 fits roughly 6.5 to 8.5 inches, 255/40R20 fits 8.5 to 10 inches, and 255/45R20 fits 8.0 to 9.5 inches. Those ranges apply to the specific sizes, not across the whole Lincoln lineup.

Rim width matters because the same wheel diameter does not automatically mean the same wheel width is correct. Before mounting a replacement tire on a 2018 Lincoln Trucks wheel, match both the diameter and the width range for the chosen size so the tire keeps the intended profile and bead seating characteristics.

The 2018 Lincoln Trucks products covered here are modern radial tires with no tube-type markings present. That points to tubeless construction for the represented 245/45R19, 255/40R20, 235/50R18, and 255/45R20 applications rather than inner-tube use. Tube-type collector-car concerns do not apply in the same way on these late-model Lincoln fitments.

Even so, the wheel and valve hardware still deserve attention before installation. If a 2018 Lincoln Trucks vehicle has older or damaged valve stems, corrosion at the bead seat, or wheel damage, correct those issues during mounting so the new tubeless tire can seal and hold pressure as intended.

A 2018 Lincoln Trucks vehicle should be stored away from direct sunlight, standing moisture, and ozone-producing equipment such as electric motors, welders, or running compressors. Keep the tires at proper inflation and move the vehicle periodically if it will sit for long stretches, since static load can encourage flat-spotting even on modern radials.

If the vehicle will be parked for a season, a clean, cool garage and occasional rolling are usually better than letting it sit in one place for months. Long-term storage on a consistently damp surface or next to ozone sources can age the sidewalls faster than mileage would suggest, especially on luxury SUVs that may see lower annual use.

On a 2018 Lincoln Trucks vehicle, tire age is usually a more useful guide than mileage alone, especially if the vehicle is driven intermittently. A good rule is to begin regular age-based evaluation around five to seven years and to treat around ten years as the point where replacement deserves serious consideration regardless of remaining tread. The DOT date code on the sidewall is the starting point for that timeline.

Luxury crossovers and SUVs can accumulate tread slowly while still aging out by time, heat cycles, and environmental exposure. If a 2018 Lincoln Trucks vehicle has plenty of tread but shows hardening, cracking, or persistent vibration, judge the tire by condition and age first rather than assuming it is still serviceable because the tread depth looks acceptable.

Tires on a 2018 Lincoln Trucks vehicle should be checked before every drive and given a closer inspection before any longer outing. Look for cuts, bulges, sidewall cracking, uneven wear, visible punctures, and any sign of pressure loss. Because these are tubeless radial applications, include the valve stems and bead area in the inspection routine as well.

Frequent inspection matters because heavier luxury utilities can mask tire problems until they become more serious at speed. A quick walkaround before local driving and a fuller check before road trips can catch a damaged sidewall, aging valve stem, or slow leak early enough to prevent a roadside problem.

The 2018 Lincoln Trucks tires represented here are modern radial designs, and the product-covered sizes carry W or Y/ZR service levels where those markings appear. W corresponds to 118 mph, while Y or Z/Y indicates 186+ mph capability in the tire’s service description. Those ratings are well beyond normal U.S. highway speeds when the tire is in proper condition and correctly inflated.

Highway safety still depends on more than the sidewall code. Condition, age, inflation pressure, alignment, and the mechanical state of the vehicle matter at least as much, so a 2018 Lincoln Trucks tire with a high speed rating should still be treated cautiously if it is old, worn unevenly, or mounted on a wheel that is not correct for the size.

Inflation pressure on a 2018 Lincoln Trucks tire should follow the vehicle placard or owner’s manual for normal service, with the tire maker’s sidewall figures understood as maximum load-and-pressure ratings rather than the everyday setting for the vehicle. Where stated, examples here include 1,874 pounds at 50 psi for a 245/45R19, 1,819 pounds at 50 psi for a 255/40R20, 1,819 pounds at 50 psi for some 235/50R18 products, and 1,819 pounds at 51 psi for some 255/45R20 products.

Do not transfer a pressure figure from one 2018 Lincoln Trucks size to another just because both are used on Lincoln vehicles. The correct approach is to match the exact tire size and then use the factory vehicle recommendation for routine driving, adjusting only within the tire manufacturer’s limits when load conditions or service needs truly require it.

Before a longer drive in a 2018 Lincoln Trucks vehicle, inspect each tire for cracking, punctures, exposed cords, bulges, and uneven wear, then confirm pressures when the tires are cold. Check the valve stems, confirm the spare is usable, and make sure the wheel size and tire size match correctly on all four corners if the vehicle is not using a staggered setup.

A tire inspection should be part of a wider trip-prep routine on a luxury crossover or SUV. Once the tires are sorted, give equal attention to brakes, fluids, battery condition, and suspension feel, since a long highway run can expose neglected maintenance that may not show up during short local driving.