The 2023 Genesis G90 sits at the top of Genesis luxury-sedan design, pairing modern flagship comfort with a strong emphasis on quiet road manners, presence, and high-speed composure. On this car, tire choice is closely tied to the exact wheel and axle setup, because the G90 uses staggered radial fitments in both 20-inch and 21-inch combinations. Front and rear sizes are different, and the available replacements range from blackwall performance-oriented tires to redline and raised white letter options in select sizes. The right decision starts with confirming whether the car carries the 20-inch 3.5T AWD setup or the 21-inch E-Supercharger setup, then matching front and rear fitment carefully.
Which Tire Size Is Right for The 2023 Genesis G90
The 2023 Genesis G90 uses four primary tire sizes, and the correct choice depends first on identifying the exact front or rear position and whether the car carries the 20-inch or 21-inch wheel package. This is a staggered radial fitment, so front and rear tires are not interchangeable. Confirming wheel diameter and axle position is the essential first step before comparing tire series, sidewall style, or brand options.
A 245/45R20 tire is a metric radial size with a 245-millimeter nominal section width, a 45-series profile, and fitment for a 20-inch rim. On the 2023 Genesis G90, this size is used in a front-position application within the 20-inch staggered setup, so it should be matched to the correct rear companion size rather than selected as a standalone fitment. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, redline, and raised white letter styling depending on the tire series. This size is the right place to focus when replacing the front tires on a 20-inch G90 while preserving the intended staggered arrangement.
A 275/40R20 tire is a metric radial size with a 275-millimeter nominal section width, a 40-series profile, and a 20-inch rim diameter. On the 2023 Genesis G90, this size serves the rear position in the 20-inch staggered fitment, giving it a distinct role from the narrower front tire. Product choices include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, with blackwall as the most common presentation and redline or raised white letter treatments available in select offerings. This size matters when replacing rear tires on a 20-inch car and when checking wheel-width compatibility against the specific tire being considered.
A 245/40R21 tire is a metric radial size with a 245-millimeter nominal section width, a 40-series profile, and fitment for a 21-inch wheel. On the 2023 Genesis G90, this size is used on the front axle of the E-Supercharger configuration, making wheel diameter confirmation especially important before purchase. Its profile and rim size place it apart from the 20-inch front fitment, even though the nominal width is similar. This size should be chosen only when the car is equipped with the 21-inch staggered setup and the front axle is the position being replaced.
A 275/35R21 tire is a metric radial size with a 275-millimeter nominal section width, a 35-series profile, and a 21-inch rim diameter. On the 2023 Genesis G90, it is the rear companion to the 245/40R21 front tire in the 21-inch staggered arrangement, so it should be evaluated as part of that matched setup. The lower-profile 21-inch rear size differs meaningfully from the 20-inch rear fitment, even though both are 275-millimeter widths. This size is the correct focus for rear replacement on a 21-inch G90 after confirming the wheel package already on the car.
Tire fitment on the 2023 Genesis G90 varies by configuration and by axle position rather than following one universal size across the lineup. Checking the exact sub-model and whether the tire is for the front or rear is essential, because the car uses staggered setups in both 20-inch and 21-inch forms.
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2023 Genesis G90 3.5T AWD Front
The 2023 Genesis G90 3.5T AWD Front uses the front tire size from the 20-inch staggered setup. Tire selection here centers on matching the existing 20-inch front fitment while coordinating properly with the rear size already on the car.
The 2023 Genesis G90 3.5T AWD Rear uses the wider rear tire from the 20-inch staggered arrangement. That makes axle position important, especially when comparing available tire series, sidewall appearance, and wheel-width suitability within this rear size.
The 2023 Genesis G90 E-Supercharger Front uses the front tire size from the 21-inch setup. The main priority is confirming that the car actually carries the 21-inch wheel package before selecting a replacement for this front position.
The 2023 Genesis G90 E-Supercharger Rear uses the rear tire size paired with the 21-inch front fitment. Replacement planning should keep the staggered layout intact and focus on the correct rear size for the 21-inch configuration rather than the 20-inch rear alternative.
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 2023 Genesis G90 Tires for Sale
Available 20-inch G90 tire choices include BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster, with differences in tire series, blackwall versus redline or raised white letter styling, and in some cases rim-width and load-capacity specifications. The product grid is most useful for comparing those details within the correct front or rear size.
These FAQs focus on the exact tire sizes used on the 2023 Genesis G90, how the front and rear fitments differ, what to compare between available products, and what to inspect before putting a staggered luxury sedan back on the road.
Tire Size & Fitment
What tire size fits a 2023 Genesis G90?
The 2023 Genesis G90 uses four tire sizes across two staggered wheel packages: 245/45R20 and 275/40R20 for the 20-inch setup, plus 245/40R21 and 275/35R21 for the 21-inch setup. All of these are radial tire sizes, and each one is position-specific rather than universal across the car.
The key is to confirm both wheel diameter and axle position before selecting a tire. A front G90 tire should be matched to the correct front size, and a rear tire should be matched to the proper rear companion size for that same setup. On a staggered sedan like the G90, choosing by width alone is not enough.
What size rim does a 2023 Genesis G90 use?
The 2023 Genesis G90 uses either 20-inch or 21-inch rims, depending on configuration. The 3.5T AWD setup uses 20-inch front and rear rim diameters, while the E-Supercharger setup uses 21-inch front and rear rim diameters, each with different staggered tire sizes.
That makes wheel-diameter confirmation the first fitment check before replacing tires. Reading the sidewall on the existing tire or checking the wheel itself can prevent mixing a 20-inch size with a 21-inch setup. Once rim diameter is confirmed, the next step is matching the correct front or rear tire size for that wheel package.
Why does the 2023 Genesis G90 have more than one tire size?
The 2023 Genesis G90 has more than one tire size because it uses staggered front and rear fitments, and it was offered with both 20-inch and 21-inch wheel packages. That creates four primary sizes overall: one front and one rear size for the 20-inch setup, and one front and one rear size for the 21-inch setup.
This matters because the correct replacement depends on the exact configuration already on the car. A buyer should identify whether the G90 is a 3.5T AWD or E-Supercharger configuration, then confirm whether the tire being replaced is mounted on the front or rear axle. That approach keeps the tire choice aligned with the intended staggered arrangement.
Choosing the Right Tire
What should I consider when choosing a tire for a 2023 Genesis G90?
Start with the correct size, axle position, and wheel diameter, because the 2023 Genesis G90 uses staggered front and rear radial fitments in either 20-inch or 21-inch form. After that, compare the available tire series, sidewall style, rim-width specifications where given, and any stated load-capacity details that apply to the exact size you need.
The best comparison is not just between brands, but between tires that suit the way the car is used and the appearance you want. A blackwall performance-style tire gives one look, while redline or raised white letter options create a more expressive presentation. Matching both front and rear selections within the correct setup keeps the car visually and mechanically consistent.
What sidewall styles are available for 2023 Genesis G90 tires?
Available sidewall styles for 20-inch 2023 Genesis G90 tire sizes include blackwall, redline, and RWL, which is raised white letter. Blackwall appears across several BFGoodrich, Nitto, and M&H Racemaster offerings, while Pro-Trac Street Pro III adds redline and raised white letter choices in select 20-inch sizes.
Sidewall style affects appearance more than fitment, but it can change the overall character of the car dramatically. A blackwall look keeps the presentation more understated, while redline and raised white letter treatments make the tire visually prominent. The important thing is to choose the sidewall style within the exact size required for the front or rear position.
What brands offer tires for the 2023 Genesis G90?
Tires for the 20-inch 2023 Genesis G90 fitments are available from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster. Those brands appear across different tire series and use cases, including blackwall road tires, styled sidewall options, and a drag radial offering in the 275/40R20 rear size.
Brand alone should not be the only deciding factor. Compare the exact tire size first, then look at the series, sidewall treatment, rim-width specification where supplied, and whether the tire suits the role you need it to fill on the car. That is especially important on the G90 because each axle position has its own dedicated size.
Restoration & Appearance
Which tire should I choose for a period-style 2023 Genesis G90?
A period-style approach on a 2023 Genesis G90 usually starts with keeping the car in its correct staggered front and rear size combination and then choosing a tire whose sidewall presentation matches the look you want. Blackwall maintains a contemporary luxury-sedan appearance, while redline or raised white letter options create a more custom visual statement in select 20-inch sizes.
Because this is a modern flagship sedan, appearance choice is more about style direction than restoration authenticity. The safest way to preserve the car's intended stance is to stay with the exact wheel diameter and axle-specific sizing already on the vehicle. From there, the sidewall treatment and tire series can shape the final look without changing the fitment format.
How does tire construction affect the appearance of a restored 2023 Genesis G90?
On the 2023 Genesis G90, construction does not create a bias-ply versus radial appearance decision because the primary fitments are radial. Visual differences come more from sidewall treatment and tire series than from construction type, especially in the available 20-inch options where blackwall, redline, and raised white letter styles are offered.
That means the appearance decision is really about how subtle or expressive the tire should look once mounted. A blackwall tire blends into the car's modern luxury character, while redline or raised white letter options draw more attention to the wheel and tire package. Keeping the correct front and rear sizes remains the foundation of a clean, well-balanced presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2023 Genesis G90?
Yes. On a 2023 Genesis G90, changes such as aftermarket wheels, altered wheel width, different offset, suspension lowering, or body modifications can affect whether the original tire size remains suitable. That matters even more on this car because it uses staggered front and rear sizing, so each axle already has its own fitment requirements.
A modified G90 should be checked for wheel diameter, wheel width, and clearance at full steering lock and suspension movement before new tires are selected. Even when the sidewall size looks familiar, changes in wheel or chassis setup can alter how the tire sits in the fender opening. Matching the tire to the actual current setup is more important than assuming the car is still stock.
What should I inspect before driving a 2023 Genesis G90 on new tires?
Before driving a 2023 Genesis G90 on new tires, inspect the wheel size, confirm that the front and rear tires are mounted in their correct positions, and check inflation pressure carefully. It is also wise to look over the wheels for damage and make sure the tires clear suspension and body components without rubbing.
A short initial road test can help confirm that the car tracks properly and that there is no vibration, unusual noise, or interference under turning or compression. On a staggered luxury sedan, proper placement matters just as much as the size itself. Rechecking pressure after the first drive is a sensible step once the tires have settled into service.
How often should tires on a 2023 Genesis G90 be inspected?
Tires on a 2023 Genesis G90 should be inspected regularly for pressure loss, uneven wear, cuts, bulges, and sidewall damage. A quick visual check before longer trips is sensible, and a closer inspection at routine service intervals helps catch problems early, especially on a staggered setup where front and rear tires do different work.
Cars that are driven less often still benefit from frequent checks, because tire condition can change even when mileage stays low. Pay close attention to tread wear patterns and any signs that the tires are aging or losing air over time. Catching those issues early helps protect ride quality, handling consistency, and overall confidence on the road.
