The 2019 Lexus GS350 sits in the last chapter of Lexus rear-drive sport sedan development, blending refined luxury with the sharper handling and stance buyers expect from a modern performance-oriented four-door. That matters at tire time, because this car uses radial fitments in more than one size, with 18-inch and 19-inch applications depending on sub-model and wheel setup. The F Sport lineup adds another layer, including a staggered 19-inch arrangement on the rear-drive version. Available choices focus on modern blackwall performance radials from BFGoodrich and Nitto across several series. For the right result, start by confirming the exact sub-model and wheel diameter before comparing tread design, load capacity, and overall driving priorities.
Which Tire Size Is Right for The 2019 Lexus GS350
The 2019 Lexus GS350 uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel setup. Some versions use 18-inch wheels, while others use 19-inch wheels, and the rear-drive F Sport adds a wider rear tire. Before choosing a tire, confirm whether the car is Base or F Sport, whether it is AWD or RWD, and whether the wheel in question is front or rear.
Fit(s): Base, F Sport (AWD), and F Sport (RWD) Front
Construction: Radial|Rim: 19 in
235/40R19 is a metric radial size that identifies a tire with a 235-millimeter nominal section width, a 40-series aspect ratio, and a 19-inch rim diameter. On the 2019 Lexus GS350, this size serves as a front-size fitment in key 19-inch applications, including F Sport configurations, so it is tied closely to the car’s sharper handling-oriented setups. Available choices include blackwall radial tires from BFGoodrich in the g-Force Phenom T/A series. This size is the one to evaluate when the car already wears 19-inch front wheels and the goal is maintaining the intended stance and wheel fitment.
235/45R18 is a metric radial size with a 235-millimeter nominal section width, a 45-series aspect ratio, and an 18-inch rim diameter. On the 2019 Lexus GS350, it applies to 18-inch wheel applications and offers nearly the same overall diameter as the 19-inch front fitment, but on a different wheel diameter that must be matched correctly. Product choices in this size come from BFGoodrich and include blackwall options in the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. This is the size to consider when the car is equipped with the 18-inch setup and the decision is about tire series and intended use rather than wheel conversion.
265/35R19 is a metric radial size that uses a wider 265-millimeter nominal section width, a 35-series aspect ratio, and a 19-inch rim diameter. On the 2019 Lexus GS350, this is the wider rear tire used in the staggered 19-inch setup for the rear-drive F Sport, so it should not be treated as a universal fitment for every GS350. Available blackwall choices include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. This size matters when preserving the intended staggered front-to-rear arrangement and confirming rear wheel width before selecting a tire.
Tire fitment on the 2019 Lexus GS350 changes by sub-model and, in one case, by axle position. Checking the exact trim and whether the car uses an 18-inch or 19-inch setup is the first step before comparing tire options.
1
2019 Lexus GS350 Base
The 2019 Lexus GS350 Base uses either an 18-inch or 19-inch front-size fitment depending on the wheel package on the car. Tire selection starts with confirming the actual wheel diameter, then comparing radial choices within the correct size and rim-width range.
The 2019 Lexus GS350 F Sport (AWD) uses the 235/40R19 radial size. That keeps the selection process fairly straightforward, with the main decision centered on choosing among available blackwall performance-oriented tire series for a 19-inch front and rear setup.
The front position on the 2019 Lexus GS350 F Sport (RWD) uses 235/40R19. This means the front tire choice should be made as part of a staggered setup, with attention paid to matching the correct front size rather than using the wider rear fitment at all four corners.
The rear position on the 2019 Lexus GS350 F Sport (RWD) uses the wider 265/35R19 radial size. That wider rear fitment affects both appearance and setup, so it is important to confirm the rear wheel and keep the staggered arrangement in mind when replacing tires.
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 GS350 Tires for Sale
Available 2019 Lexus GS350 tire choices center on modern blackwall radials from BFGoodrich and Nitto. Depending on size, the product grid lets you compare different g-Force series and the NT555 G2, along with rim-width compatibility, load figures where stated, and other specification details.
Common 2019 Lexus GS350 tire questions usually come down to size by sub-model, 18-inch versus 19-inch wheel fitment, staggered F Sport setups, and how to compare the available radial tire series for road use and maintenance.
Tire Size & Fitment
What tire size fits a 2019 Lexus GS350?
The 2019 Lexus GS350 uses 235/45R18, 235/40R19, and 265/35R19 depending on the sub-model and wheel position. Base models can use either 235/45R18 or 235/40R19, the F Sport (AWD) uses 235/40R19, and the F Sport (RWD) uses a staggered setup with 235/40R19 in front and 265/35R19 in the rear.
That means the correct choice starts with identifying the exact version of the car and checking the wheel already installed. A GS350 with 18-inch wheels needs a different tire than one with 19-inch wheels, and the rear-drive F Sport should keep its front and rear sizes separated unless the wheel and suspension setup have been changed.
What size rim does a 2019 Lexus GS350 use?
The 2019 Lexus GS350 uses either an 18-inch or 19-inch rim diameter, depending on the specific setup. The 235/45R18 tire mounts on an 18-inch rim, while both 235/40R19 and 265/35R19 mount on 19-inch rims.
Rim diameter is the first fitment check because the tire must match the wheel exactly. After confirming diameter, it also helps to compare wheel width against the tire’s recommended range where available, especially on 19-inch applications and on the staggered rear-drive F Sport, where the wider rear size needs the correct rear wheel.
Why does the 2019 Lexus GS350 have more than one tire size?
The 2019 Lexus GS350 has more than one tire size because fitment changes with trim level, wheel package, and in some cases axle position. Base models may use either 18-inch or 19-inch fitments, while the F Sport (RWD) uses a staggered arrangement with a wider rear tire than the front.
That variation is normal on a modern sport sedan with multiple wheel and handling packages. Instead of choosing by year and model alone, confirm whether the car is Base or F Sport, whether it is AWD or RWD, and whether the tire being replaced is on the front or rear of the vehicle.
Choosing the Right Tire
What should I consider when choosing a 2019 Lexus GS350 tire?
Start with the correct size for the exact GS350 configuration, then compare radial construction, wheel diameter, and whether the car uses a square or staggered setup. On this model, the main fitment choices are 235/45R18, 235/40R19, and 265/35R19, and each serves a different wheel and sub-model application.
Once size is confirmed, compare the tire series available in that size, along with blackwall styling, rim-width requirements where stated, and load capacity information when shown. That approach keeps the decision grounded in actual fitment, while still letting the buyer choose a tire that matches the car’s intended road use and overall character.
What brands offer tires for the 2019 Lexus GS350?
Tires for the 2019 Lexus GS350 are available from BFGoodrich and Nitto in the sizes covered here. BFGoodrich appears across all three fitments, while Nitto is available in 265/35R19 for the wider rear application used on the rear-drive F Sport.
Brand is only one part of the decision, so it helps to compare each tire within the correct size first. After that, look at the specific series, blackwall presentation, rim-width range where stated, and any load details included with the tire, especially when replacing rear tires on a staggered 19-inch setup.
What tire series are available for the 2019 Lexus GS350?
The 2019 Lexus GS350 tire options here include BFGoodrich g-Force Phenom T/A, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, and Nitto NT555 G2. The exact series available depends on the tire size, with 235/45R18 offering the broadest range among the listed fitments.
Series differences matter because they shape the comparison once the correct size is known. A buyer looking at 235/45R18 can evaluate several BFGoodrich lines, while 265/35R19 opens the door to both BFGoodrich and Nitto choices, making it useful to compare the tire’s stated specs against the car’s wheel setup and intended use.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Lexus GS350 restoration?
Yes, correct tire fitment still matters on a 2019 Lexus GS350, even though the vehicle is modern enough that the focus is usually proper specification rather than vintage restoration style. Using the right size preserves the intended relationship between the wheel, tire, and body, especially on F Sport models with 19-inch fitments and staggered rear-drive setups.
Appearance on this car is closely tied to maintaining the proper wheel diameter and sidewall profile. A buyer trying to keep the car visually true to its original setup should confirm the installed wheel package first, then choose a tire that matches the correct size and overall presentation rather than mixing 18-inch and 19-inch fitments.
Which sidewall style suits a period-style 2019 Lexus GS350?
The available tires for the 2019 Lexus GS350 use a blackwall sidewall style, which suits the car’s contemporary sport-luxury character. On a sedan from this era, blackwall tires preserve the clean, modern presentation that fits both standard and F Sport versions without adding vintage-style sidewall treatments that belong to much earlier vehicles.
For appearance-minded buyers, the main visual choice is less about sidewall decoration and more about keeping the proper size on the correct wheel. Matching the intended 18-inch or 19-inch setup, and keeping the staggered rear size on rear-drive F Sport models, has a much bigger effect on the finished look than changing between tire brands alone.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Lexus GS350?
Yes, modifications can affect tire fitment on a 2019 Lexus GS350 even when the replacement tire matches one of the original sizes. Changes such as aftermarket wheels, altered wheel width, different offset, lowered suspension, or body modifications can all change how a 235/45R18, 235/40R19, or 265/35R19 tire sits in the wheelwell.
That is especially important on the staggered F Sport (RWD), where front and rear tire sizes are already different. Before installing new tires, check wheel diameter, wheel width, and clearance at steering lock and through suspension travel so the selected tire works with the car’s actual setup rather than just the original specification.
What should I inspect before driving a 2019 Lexus GS350 on new tires?
Before driving a 2019 Lexus GS350 on new tires, inspect wheel condition, verify that each tire matches the correct size for its position, and confirm proper inflation. It also helps to check for obvious suspension or alignment issues, because uneven wear or steering pull can shorten tire life quickly on a sport sedan with low-profile radial fitments.
A careful walk-around is worthwhile after installation and again after the first few drives. Look for any sign of rubbing, confirm that staggered front and rear positions were not mixed on an F Sport (RWD), and keep an eye on air loss, vibration, or unusual wear patterns that may point to wheel, alignment, or balance concerns.
How should 235/40R19, 235/45R18, and 265/35R19 tires on a 2019 Lexus GS350 be maintained?
These GS350 tire sizes should be maintained with regular pressure checks, routine tread and sidewall inspection, and attention to wear patterns across all four corners. Because this model uses low-profile radial tires, it is also smart to watch for cuts, bulges, impact damage, or irregular shoulder wear that can develop after pothole strikes or alignment problems.
Maintenance also means matching the routine to the setup on the car. A square arrangement can be managed differently than the staggered rear-drive F Sport, where front-to-rear rotation is limited by the tire sizes. On any version, long periods of storage still call for checking age, air retention, and visible cracking before regular road use resumes.
