The 2019 Lexus GS300 sits in the later years of Lexus sport-sedan development, blending rear-wheel-drive luxury character with a more athletic chassis than many midsize luxury cars in its class. That matters when tire selection comes into focus, because this GS300 uses four different radial tire sizes depending on wheel package and F Sport front or rear position. Choices here are less about vintage-style construction and more about matching the exact wheel diameter, preserving the intended stance, and selecting among blackwall performance-oriented tire series from BFGoodrich and Nitto. The right decision starts with confirming whether the car is a Base model on 17- or 18-inch wheels or an F Sport on staggered 19-inch fitment.
Which Tire Size Is Right for The 2019 Lexus GS300
The 2019 Lexus GS300 uses four primary tire sizes, and the correct one depends on sub-model and wheel diameter. Base models use either 225/50R17 or 235/45R18, while F Sport fitment moves to a staggered 19-inch setup with 235/40R19 in front and 265/35R19 in the rear. Before comparing tires, confirm the exact wheel size and whether the car uses the F Sport front and rear combination.
225/50R17 is a metric radial size with a 225-millimeter section width, a 50-series aspect ratio, and fitment for a 17-inch rim. On the 2019 Lexus GS300, this size is used on certain Base configurations and represents the smaller of the two Base wheel packages. Available choices are blackwall radials from BFGoodrich and Nitto across g-Force Comp 2 AS, g-Force Sport Comp 2, and NT555 G2 series. This size is the right place to focus if the car has 17-inch wheels and the goal is to maintain the intended base-model fitment without moving to a larger rim package.
235/45R18 is a metric radial size that uses a 235-millimeter section width, a 45-series profile, and an 18-inch rim diameter. This size applies to certain 2019 Lexus GS300 Base cars equipped with the larger non-F Sport wheel package, so it should not be confused with the 19-inch staggered F Sport setup. Product choices center on blackwall BFGoodrich performance radials in g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. It is the correct size to evaluate when the car carries 18-inch wheels and a square fitment rather than different front and rear tire widths.
235/40R19 is a metric radial with a 235-millimeter section width, a lower 40-series profile, and fitment for a 19-inch rim. On the 2019 Lexus GS300, this size serves the front position of the F Sport configuration and works as part of a staggered setup rather than a same-size arrangement at all four corners. The available product in this size is a blackwall BFGoodrich g-Force Phenom T/A radial. This front-size fitment matters because selecting it correctly helps preserve the intended balance of the F Sport package and avoids mixing it up with Base-model square tire sizing.
265/35R19 is a metric radial size with a 265-millimeter section width, a 35-series profile, and a 19-inch rim diameter. It is the rear tire size for the 2019 Lexus GS300 F Sport, paired with a narrower 235/40R19 front tire in a staggered arrangement. Blackwall choices in this size include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. This is the size to review when confirming the rear axle fitment on an F Sport car, especially if tire rotation patterns, wheel position, or prior replacement history have created confusion.
Sub-model fitment matters on the 2019 Lexus GS300 because tire sizing changes with wheel package and F Sport front or rear position. Base models use square sizing, while the F Sport setup uses different front and rear 19-inch tires, so identifying the exact configuration is the first step.
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2019 Lexus GS300 Base
The 2019 Lexus GS300 Base uses radial tires in either a 17-inch or 18-inch square fitment, depending on wheel package. Tire selection here centers on confirming the installed wheel diameter first, then comparing available blackwall performance radial options within the correct size.
The 2019 Lexus GS300 F Sport Front uses a 235/40R19 radial tire at the front axle. That makes front-position confirmation important, since the F Sport does not use the same 19-inch tire size at both ends of the car.
The 2019 Lexus GS300 F Sport Rear uses a wider 265/35R19 radial tire at the rear axle. Tire choice should account for the staggered layout so the rear size is matched correctly rather than replaced with the narrower front fitment.
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 2019 Lexus GS300 Tires for Sale
Available 2019 Lexus GS300 tires focus on modern blackwall radial performance fitments in 17-, 18-, and 19-inch sizes. Depending on the size, choices include BFGoodrich and Nitto options across g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 series.
These 2019 Lexus GS300 tire FAQs focus on exact size fitment by sub-model, rim diameter, staggered F Sport sizing, and how to compare the available radial tire choices before road use.
Tire Size & Fitment
What tire size fits a 2019 Lexus GS300?
The 2019 Lexus GS300 uses four tire sizes across its configurations: 225/50R17, 235/45R18, 235/40R19, and 265/35R19. Base models use either 225/50R17 or 235/45R18, while the F Sport uses a staggered 19-inch setup with 235/40R19 in front and 265/35R19 in the rear.
The correct choice depends on the exact wheel package and whether the car is a Base model or an F Sport. Checking the installed wheel diameter and confirming front versus rear position on an F Sport car prevents mixing square-fitment sizes with the staggered 19-inch arrangement.
What size rim does a 2019 Lexus GS300 use?
The 2019 Lexus GS300 uses 17-inch, 18-inch, and 19-inch rim diameters, depending on configuration. The 225/50R17 size fits a 17-inch rim, 235/45R18 fits an 18-inch rim, and both 235/40R19 and 265/35R19 fit 19-inch rims on the F Sport setup.
Rim diameter should be confirmed before comparing tires because the GS300 does not use one universal wheel size. On Base cars, the decision is usually between 17-inch and 18-inch fitment, while F Sport owners also need to verify whether the tire is for the front or rear axle.
Do all 2019 Lexus GS300 sub-models use the same tire size?
No, 2019 Lexus GS300 sub-models do not all use the same tire size. The Base model uses either 225/50R17 or 235/45R18, while the F Sport uses a staggered setup with 235/40R19 on the front and 265/35R19 on the rear.
That difference matters because the wrong size can upset the intended fitment, especially on an F Sport car where front and rear tires are different widths. Looking at the current wheel size and axle position is the most practical way to narrow the selection before comparing available tire models.
Choosing the Right Tire
What should I consider when choosing a 2019 Lexus GS300 tire?
Start with the exact size that matches the car's configuration: 225/50R17, 235/45R18, 235/40R19 front, or 265/35R19 rear. From there, compare construction details within the radial category, along with rim-width compatibility where given, tire series, load figures, and whether the tire suits a square or staggered setup.
The best comparison is usually between tires in the same size rather than across wheel packages. Base-model owners should confirm whether the car has 17-inch or 18-inch wheels, and F Sport owners should match front and rear positions carefully before deciding between BFGoodrich and Nitto offerings.
What sidewall styles are available for 2019 Lexus GS300 tires?
The available 2019 Lexus GS300 products use a blackwall sidewall style. That keeps the focus on modern radial performance fitment rather than on whitewall, redline, or other appearance-driven sidewall treatments more common on collector-era vehicles.
For this Lexus, the meaningful differences are more about tire series, sizing, and wheel-package compatibility than sidewall appearance. Once the correct size is confirmed, the next step is comparing the available blackwall options by brand, series, and any published rim-width or load-capacity details tied to that exact size.
What brands offer tires for the 2019 Lexus GS300?
Tires for the 2019 Lexus GS300 are available from BFGoodrich and Nitto, depending on size. BFGoodrich appears across several GS300 fitments, while Nitto is available in 225/50R17 and 265/35R19 among the current product choices.
Brand should be compared only after the correct size and wheel package are confirmed. A Base model on 17-inch or 18-inch wheels presents a different set of choices than an F Sport with staggered 19-inch tires, so the useful comparison is brand within the right size rather than brand in the abstract.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Lexus GS300 restoration or preservation project?
Yes, correct tire fitment still matters on a 2019 Lexus GS300, especially for an owner trying to preserve the car's intended stance and wheel-package character. The key is using the proper radial size for the exact configuration, whether that means a Base-model square setup or the F Sport's staggered 19-inch arrangement.
Appearance on this car is less about vintage sidewall style and more about keeping the proportions consistent with the installed wheels. A preservation-minded owner should confirm the current rims, avoid mixing Base and F Sport sizes, and choose a tire series that suits the car's intended visual and road-use balance.
How does tire construction affect the appearance of a preserved 2019 Lexus GS300?
On a 2019 Lexus GS300, tire construction is straightforward because the primary fitments are all radial. That means appearance differences come less from bias-ply versus radial character and more from choosing the proper profile and width for the car's actual 17-, 18-, or 19-inch wheel package.
The biggest visual mistake is usually an incorrect size rather than the wrong construction type. Keeping the correct front and rear relationship on an F Sport, or the right square fitment on a Base model, helps maintain the sedan's intended proportions and prevents an obviously mismatched stance.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Lexus GS300?
Yes, modifications can affect tire fitment on a 2019 Lexus GS300. Aftermarket wheels, altered offsets, suspension changes, lowering, or body modifications can change how a 225/50R17, 235/45R18, 235/40R19, or 265/35R19 tire sits in the wheel opening and how much clearance remains during steering and suspension movement.
A modified car should be checked more carefully than a stock one before replacing tires by size alone. Wheel width, wheel diameter, front-versus-rear position, and visible clearance at the fender and suspension are all worth confirming, especially on the F Sport's staggered 19-inch setup.
What should I inspect before driving a 2019 Lexus GS300 on new tires?
Before driving a 2019 Lexus GS300 on new tires, inspect wheel condition, confirm the installed size at each position, and make sure inflation is set correctly for the tire and vehicle setup. It also helps to check for visible clearance around the fenders, inner liners, and suspension components once the car is on the ground.
A short initial road test can reveal vibration, rubbing, or an accidental front-to-rear size mix on staggered F Sport cars. After the first drive, recheck pressure and take another look at the sidewalls and tread shoulders to make sure the tires are seating and wearing evenly.
How often should tires on a 2019 Lexus GS300 be inspected?
Tires on a 2019 Lexus GS300 should be inspected regularly, not just when tread looks low. Even on a newer collector-minded or lightly driven sedan, it is smart to look for uneven wear, cuts, bulges, cracking, and pressure loss, especially when the car spends long periods parked between drives.
Routine inspections matter even more on F Sport cars because the staggered layout makes front and rear tire wear patterns different by design. Checking condition often also helps catch wheel damage, alignment issues, or pressure changes early, before they turn into ride, handling, or clearance problems.
