2018 Maserati Tire Fitment Guide

2018 Maserati vehicles use seven sizes across three model lines: 245/35R21, 245/40R20, 245/45R19, 275/40R19, 285/30R21, 285/35R20, and 245/35R20. The Ghibli and Quattroporte share 245/35R21, 245/40R20, 245/45R19, 275/40R19, 285/30R21, and 285/35R20, while the GranTurismo uses 245/35R20 and 285/35R20. Rim diameters span 19, 20, and 21 inches, and published rim-width ranges appear on some available 19- and 20-inch products rather than every size in the range.

That means a 2018 Maserati owner should begin with the exact model and the wheel diameter already on the car, especially on staggered front-and-rear setups. A Ghibli or Quattroporte can share size families, but a GranTurismo front tire is different. Checking the door-jamb placard, the current sidewall, and the actual wheel diameter before choosing a replacement will usually prevent the most common ordering mistake.

On a 2018 Maserati, 245/35R20 is a metric radial size. The 245 is the nominal section width in millimeters, 35 is the aspect ratio, meaning the sidewall height is 35 percent of the section width, R identifies radial construction, and 20 is the wheel diameter in inches. Within the 2018 Maserati range here, that size belongs to the GranTurismo front axle rather than the sedans.

Reading the code correctly matters because a 245/35R20 is not interchangeable with a 245/40R20 or 245/45R19 just because the section width begins the same way. The sidewall height and wheel diameter are both different, which affects how the tire fits the wheel and works with the car’s original staggered setup. A GranTurismo owner should match the complete size code, not just the first number.

No. Only one size, 285/35R20, is shared across the 2018 Maserati Ghibli, GranTurismo, and Quattroporte. The Ghibli and Quattroporte share most of the range, including 19-, 20-, and 21-inch sizes, while the GranTurismo uses a unique 245/35R20 front size and pairs it with the shared 285/35R20 rear size. That makes model identification essential before choosing tires.

The practical effect is that two 2018 Maserati vehicles can both be on 20-inch wheels and still need different front tires. Sedans and coupes may also share a rear size while using a different front pairing, so replacing only one axle without checking the complete staggered combination can create confusion. If the car came to you secondhand, inspect all four sidewalls and verify the wheel diameters before moving ahead.

Sidewall style depends on the size. 245/45R19, 275/40R19, and 245/35R20 appear in Blackwall only, while 245/40R20 and 285/35R20 are available in both Blackwall and RWL form. On a 2018 Maserati, Blackwall is the more natural visual match for the factory-era look of a modern Italian luxury-performance car, while RWL adds a more overt aftermarket appearance.

That choice will not change the underlying size code, but it can change how finished the car looks against the wheel and body style. Owners keeping a contemporary OEM-style presentation usually stay with Blackwall. Buyers who want a more assertive, period-performance-inspired visual cue within the available aftermarket options may prefer RWL, provided it suits the rest of the car’s styling.

BFGoodrich, Nitto, and Pro-Trac cover the 2018 Maserati sizes that currently have product availability here. BFGoodrich appears across 245/40R20, 245/45R19, 275/40R19, 285/35R20, and 245/35R20; Nitto appears in those same five sizes; Pro-Trac appears in 245/40R20 and 285/35R20. All of those currently available products are radial tires built around modern high-performance sizing.

Brand choice becomes more relevant after the correct size is confirmed, because some sizes have broader style and speed-rating variety than others. A 19-inch sedan fitment leans toward Blackwall performance tires, while selected 20-inch sizes open the door to either Blackwall or RWL styling. Once the size is fixed, compare brand by sidewall preference, speed rating, and published rim-width compatibility where that information appears.

On several 2018 Maserati sizes, BFGoodrich g-Force Phenom T/A and Nitto NT555 G2 overlap as modern radial performance choices, but the published details are not identical. In 245/40R20, the BFGoodrich Phenom carries a 99Y rating and a 1,709-pound max load at 50 psi, while the Nitto NT555 G2 appears as a 99W XL. In 245/45R19, the BFGoodrich Phenom is 102Y with 1,874 pounds at 50 psi, while the Nitto is 102W XL; in 275/40R19, the BFGoodrich Phenom is 105Y with 2,039 pounds at 50 psi, while the Nitto is 105W XL.

Those differences matter most to buyers who compare by speed symbol, load information, and the way each tire fits within the car’s intended use. If you want the fullest published load-and-pressure detail or the higher Y-speed symbol where available, the BFGoodrich Phenom stands out. If you are matching an existing Nitto setup or simply staying within the correct size and service description range, the Nitto remains a direct modern-performance alternative.

Published rim-width ranges are available for several 2018 Maserati sizes. For 245/40R20, BFGoodrich products call for 8.0 to 9.5 inches. For 245/45R19, the range is 7.5 to 9.0 inches. For 275/40R19, BFGoodrich products span 9.0 to 11.0 inches, with one Sport Comp 2 application tightening that to 9.00 to 9.50 inches. For 285/35R20, a BFGoodrich application shows 9.5 to 11.0 inches, and for 245/35R20, BFGoodrich shows 8.0 to 9.5 inches.

Use those ranges to confirm that an existing wheel is appropriate for the exact tire you want, especially if the car has aftermarket wheels. A size can be correct in diameter and section width yet still have a narrower approved wheel-width window than another tire in the same nominal size. On staggered Maserati applications, check front and rear wheels separately rather than assuming both axles use the same wheel width.

Most currently available 2018 Maserati fitments here appear as modern tubeless radial products, but 285/35R20 needs a closer look because tube marking varies by product. One BFGoodrich 285/35ZR20 is explicitly marked TL, while other products in the same size do not all repeat that marking in the same way. The remaining available 19- and 20-inch performance sizes follow the normal modern tubeless pattern for this category.

The safe approach is to verify the sidewall marking on the exact tire you choose and to match it to the wheel condition and valve hardware on the car. That matters even more on a modern exotic with low-profile fitments, where wheel integrity and bead-seat condition are part of a proper installation. If the car carries non-original wheels, have the installer confirm tubeless suitability before mounting.

A 2018 Maserati should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that accelerates rubber aging. Keep the tires at operating pressure, clean off road film, and avoid long-term contact with standing moisture or petroleum products. Because these are low-profile modern radials, they generally resist storage flat-spotting better than older bias-ply tires, but they still age from heat and environment.

For cars that sit for extended stretches, rolling the vehicle periodically helps avoid one contact patch carrying the load in the same spot for months at a time. Some owners also use tire cradles or jack stands during long off-season storage, but only when the vehicle is supported correctly and safely. A climate-controlled garage does more for tire longevity than almost any dressing or cosmetic treatment.

On a 2018 Maserati, age matters at least as much as mileage. Collector and specialty cars often wear little tread yet still need regular evaluation because rubber hardens and the internal structure ages over time. A sensible rule is to inspect closely once tires reach the five- to seven-year range and to treat ten years from the DOT date code as a strong replacement point, even if the tread still looks usable.

That guideline is especially important on performance-oriented Maserati fitments, where handling balance depends on a tire that still has sound structure and pliable rubber. A car driven only on fair-weather weekends can still age out its tires long before it wears them out. When in doubt, read the DOT date code on each tire and make age part of the replacement decision, not just tread depth.

Tires on a 2018 Maserati should be checked before every drive and inspected more thoroughly before any longer highway trip. Look for sidewall cracking, punctures, bulges, uneven tread wear, and any sign that one corner is losing pressure faster than the others. Because these cars commonly run staggered low-profile sizes, even a small pressure deviation can affect ride quality, steering feel, and wear pattern.

A quick walkaround before a local drive is usually enough to catch obvious trouble, but a planned trip deserves a gauge check on all four tires and a look at the spare if the car carries one. Uneven wear can also point to alignment or suspension issues rather than a tire defect alone. Catching those signs early helps preserve expensive performance tires and keeps the car more settled on the road.

Yes, the available 2018 Maserati tires here are modern radial performance tires, and the speed symbols shown are appropriate for highway use when the tires are correctly sized, properly inflated, and in sound condition. Available speed ratings include W, which is rated to 112 mph, and Y, which is rated to 186+ mph, depending on the exact size and product. Those ratings exceed normal U.S. highway speeds by a wide margin.

The more meaningful safety question on a 2018 Maserati is whether the tire matches the car’s required size, axle position, and load category, and whether the rest of the vehicle is equally ready for use. Alignment, brake condition, and suspension health matter every bit as much as the tire itself on a high-performance luxury car. Use the right size first, then confirm condition, pressure, and service description before extended road use.

Inflation pressure for a 2018 Maserati should follow the vehicle placard or owner’s manual first, because the car’s front-to-rear weight balance and staggered setup determine the target pressure. Some available tires also publish their own maximum load and pressure figures: the 245/40R20 BFGoodrich Phenom T/A carries 1,709 pounds at 50 psi, the 245/45R19 Phenom carries 1,874 pounds at 50 psi, and the 275/40R19 Phenom carries 2,039 pounds at 50 psi. Those figures are tire capacity limits, not blanket operating pressures for every Maserati application.

Do not transfer one size’s pressure figure to another axle or another wheel package. A Ghibli or Quattroporte on 19-inch tires may call for something different than the same model on 20s or 21s, and a GranTurismo setup differs again. Set pressures cold, recheck them regularly, and use the tire maker’s service information together with Maserati’s factory guidance rather than relying on sidewall maximum pressure alone.

Before a longer drive in a 2018 Maserati, inspect each tire for cuts, bubbles, exposed cords, punctures, and uneven wear across the tread. Verify cold pressures on all four tires, confirm that front and rear sizes are where they belong on a staggered setup, and look over the valve stems for age or damage. If the car has sat for weeks, also check for vibration-causing flat spotting during the first miles.

Tires are only one part of a proper pre-trip check on a modern exotic, so include brakes, fluid levels, battery condition, and the basic health of the suspension and steering system. Maserati’s performance character depends on all of those systems working together, not just on having adequate tread. A careful inspection before departure is far easier than trying to solve a tire or wheel issue after the trip is underway.