The 2018 Genesis G90 sits at the point where Genesis was establishing itself as a standalone luxury marque, with the G90 serving as its full-size flagship sedan. It blends executive-car comfort with modern rear-wheel-drive luxury-sedan proportions, and its tire fitment reflects that balance. This model uses a staggered 19-inch radial setup, with 245/45R19 tires in front and 275/40R19 tires in the rear. Available choices lean toward blackwall performance-oriented radial lines from BFGoodrich and Nitto, giving owners room to match appearance and driving character. The key decision is confirming the front-versus-rear position and selecting a tire that suits the car's wheel setup, condition, and intended road use.
Which Tire Size Is Right for The 2018 Genesis G90
The 2018 Genesis G90 uses two primary tire sizes, both on 19-inch rims, and the difference comes down to front versus rear fitment rather than a change in overall vehicle trim direction. Before choosing a tire, identify whether you are replacing a front or rear tire, because the G90 uses a staggered radial setup with a narrower front size and a wider rear size.
245/45R19 is a metric radial size in which 245 identifies the tire's nominal section width in millimeters, 45 is the aspect ratio, and 19 is the rim diameter in inches. On the 2018 Genesis G90, this size is used at the front and helps define the steering-end fitment of the staggered setup. Available choices in this size include blackwall radial tires from BFGoodrich and Nitto across lines such as g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This is the size to evaluate when replacing front tires and confirming wheel width compatibility on the car's 19-inch front wheels.
275/40R19 is a metric radial size where 275 indicates nominal section width in millimeters, 40 is the aspect ratio, and 19 designates the wheel diameter in inches. On the 2018 Genesis G90, this size is used at the rear, giving the car its wider rear tire fitment within the factory-style staggered layout. Product choices include blackwall radial offerings from BFGoodrich and Nitto, with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This is the size to focus on when replacing rear tires and checking that the wheel width matches the tire's intended mounting range.
Fitment stays consistent across the covered 2018 Genesis G90 Premium and Ultimate configurations because both use the same staggered 19-inch tire arrangement. Checking the exact front or rear position still matters, since tire choice changes by axle even when the sub-model does not.
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2018 Genesis G90 Premium Front
The 2018 Genesis G90 Premium Front uses the narrower front tire size in the G90's staggered radial setup. Tire selection here centers on choosing the correct front-position size and comparing blackwall radial options that match the front wheel width and intended driving use.
The 2018 Genesis G90 Premium Rear uses the wider rear tire size that completes the car's staggered 19-inch layout. That makes rear tire selection a matter of choosing the proper rear-position size and confirming wheel-width compatibility before comparing available radial product lines.
The 2018 Genesis G90 Ultimate Front uses the same front tire size as the Premium front position. That keeps the decision focused on front fitment, blackwall radial product choice, and matching the tire to the wheel and road-use expectations rather than trim-specific size differences.
The 2018 Genesis G90 Ultimate Rear shares the same wider rear tire size used on the Premium rear position. For replacement, the important step is keeping the rear size separate from the front and comparing radial options that suit the 19-inch rear wheel setup.
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.
Best 2018 Genesis G90 Tires for Sale
Available 2018 Genesis G90 tire choices center on 19-inch blackwall radials from BFGoodrich and Nitto. Depending on front or rear size, buyers can compare several g-Force series and the NT555 G2, along with rim-width and load-capacity details where shown.
These FAQs for the 2018 Genesis G90 focus on staggered tire sizing, 19-inch rim fitment, product selection, and the checks that matter before replacing front or rear tires on a modern luxury sedan.
Tire Size & Fitment
What tire size fits a 2018 Genesis G90?
The 2018 Genesis G90 uses a staggered tire setup with 245/45R19 tires in front and 275/40R19 tires in the rear. Both are radial tires mounted on 19-inch rims, so the correct size depends on which axle you are replacing rather than a change in rim diameter.
That means a front tire should not be chosen by rear size alone, and vice versa. Checking the actual wheel position is the first step, especially if the car has had tire rotation attempts, wheel changes, or previous replacement work that may have mixed brands or series across the car.
What size rim does a 2018 Genesis G90 use?
The 2018 Genesis G90 uses 19-inch rims with both of its primary tire sizes. The front 245/45R19 and rear 275/40R19 sizes share the same rim diameter, which keeps the wheel diameter consistent even though the front and rear tire widths differ.
Rim diameter is only one part of fitment, though. Wheel width still matters, particularly on the wider rear tire, so it is smart to confirm the actual wheel dimensions before selecting a replacement tire, especially if the car no longer has its original wheel setup.
Do all 2018 Genesis G90 sub-models use the same tire size?
The covered 2018 Genesis G90 Premium and Ultimate configurations use the same staggered sizing pattern. Both use 245/45R19 at the front and 275/40R19 at the rear, so the fitment difference is by axle position rather than by sub-model.
That makes replacement more straightforward, but it does not remove the need to check where the tire is going on the car. A buyer still needs to confirm front versus rear placement and make sure the wheel on that position matches the tire's intended width and construction.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Genesis G90?
Start with the correct axle position, since the 2018 Genesis G90 uses 245/45R19 in front and 275/40R19 in the rear. From there, compare radial construction details, wheel-width compatibility, load figures where stated, and the intended character of the available tire series.
A luxury sedan like the G90 benefits from choosing tires as a matched front and rear strategy rather than one corner at a time. Matching size first, then reviewing brand, series, and any published load or rim-width details, helps keep the car's stance, response, and overall balance consistent.
What sidewall styles are available for 2018 Genesis G90 tires?
The available 2018 Genesis G90 tire options in both primary sizes use a blackwall sidewall style. That gives the car a clean modern appearance that suits the G90's executive-sedan character without introducing whitewall, raised-white-letter, or vintage-style sidewall treatments.
Because the sidewall presentation is consistent, most of the real comparison comes from tire series, brand, wheel-width range, and any published load specifications. For many G90 owners, that simplifies the decision by keeping the visual style uniform while letting product characteristics drive the final choice.
What brands offer tires for the 2018 Genesis G90?
BFGoodrich and Nitto both offer tires for the 2018 Genesis G90's 19-inch staggered setup. Depending on size, available series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2.
The best way to use that brand choice is not to chase a name alone, but to compare the specific tire line in the correct front or rear size. Looking at series character, wheel-width specs, and any stated load information gives a more useful picture than choosing strictly by brand badge.
Restoration & Appearance
Which tire should I choose for a period-style 2018 Genesis G90?
A period-style approach on a 2018 Genesis G90 is less about vintage presentation and more about maintaining the car's original modern luxury-sedan look. Staying with the proper staggered 245/45R19 front and 275/40R19 rear blackwall radial format preserves the clean, understated appearance the G90 was designed around.
Within that look, the choice comes down to selecting a tire series that suits how the car is driven and making sure front and rear sizes remain properly paired. Keeping the correct size relationship is usually more important to appearance than small differences between modern blackwall product lines.
Does correct tire fitment matter for a 2018 Genesis G90 restoration or preservation project?
Correct tire fitment matters on a preserved 2018 Genesis G90 because the car uses a specific staggered layout rather than a one-size-all arrangement. Using the proper front and rear sizes helps maintain the sedan's intended stance and keeps the wheel openings visually balanced from front to rear.
For owners preserving originality, the safest approach is to confirm the wheel setup currently on the car and keep the 19-inch front and rear sizing relationship intact. If exact delivery-condition appearance is the goal, marque-specific references and original vehicle documentation are worthwhile before changing tire brand or series.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Genesis G90?
Yes, modifications can affect tire fitment on a 2018 Genesis G90 even when the tire size itself matches the normal front or rear specification. Aftermarket wheels, altered wheel widths, suspension changes, or body modifications can all change how a 245/45R19 or 275/40R19 tire sits and clears.
A G90 that has been lowered or fitted with non-original wheels deserves extra attention before ordering replacement tires. Confirming wheel width, checking steering and fender clearance, and verifying that front and rear positions have not been altered will help avoid choosing a tire that only matches on paper.
What should I inspect before driving a 2018 Genesis G90 on new tires?
Before driving a 2018 Genesis G90 on new tires, inspect the wheels for damage, confirm the front and rear sizes are installed in the correct positions, and check inflation pressure. It is also smart to look over suspension and steering components, since worn parts can affect how new tires wear and feel.
After installation, pay attention to clearance at full steering lock and over normal suspension movement. A short road test followed by a recheck for air loss, unusual vibration, or rubbing can catch setup issues early, especially on a staggered car where front and rear tires are not interchangeable.
How often should tires on a 2018 Genesis G90 be inspected?
Tires on a 2018 Genesis G90 should be inspected regularly for pressure loss, uneven wear, cuts, punctures, and sidewall damage. On a modern luxury sedan with staggered sizing, routine checks matter because front and rear tires may wear differently and cannot simply be treated as identical replacements.
A quick visual inspection before longer drives is a sensible habit, and a more careful look during service visits helps catch problems earlier. Any change in ride quality, vibration, steering feel, or visible shoulder wear is a reason to inspect the tires and wheel setup more closely.
