2023 Lexus IS300 Tires

The 2023 Lexus IS300 uses either 235/45R18 or 235/40R19, depending on the exact sub-model and wheel package. AWD and RWD models use 235/45R18, while AWD and RWD models with the Premium Package use 235/40R19. Both are radial metric sizes, but they are not the same fitment because they mount on different rim diameters.

The most important step is confirming whether the car has 18-inch or 19-inch wheels before choosing a tire. A tire that matches the wrong rim diameter cannot be used, and package changes matter just as much as drivetrain on this Lexus. If the car has aftermarket wheels, verify the actual wheel size on the vehicle instead of relying on trim alone.

A 2023 Lexus IS300 uses either an 18-inch or 19-inch rim, depending on the sub-model and package. The 235/45R18 fitment mounts on an 18-inch rim, while the 235/40R19 fitment mounts on a 19-inch rim. Both sizes share the same nominal section width, but the wheel diameter changes with the tire size.

That makes rim confirmation a basic fitment check before replacing tires. Looking only at the tire width can be misleading because both sizes begin with 235, yet they are built for different wheel diameters. Checking the current tire sidewall and measuring the wheel package on the car helps avoid ordering a 19-inch tire for an 18-inch setup or the reverse.

No, not all 2023 Lexus IS300 sub-models use the same tire size. Standard AWD and RWD versions use 235/45R18, while AWD and RWD versions with the Premium Package use 235/40R19. The change is tied to the package and wheel setup rather than a simple AWD-versus-RWD split.

That means the buyer should identify the exact sub-model before comparing tires. Premium Package cars move to a 19-inch fitment, so selecting by model name alone can lead to the wrong size. Checking the current tire sidewall, wheel diameter, and package details is the safest way to stay within the intended fitment for the specific IS300 configuration.

Choosing a 235/45R18 tire for a 2023 Lexus IS300 starts with confirming that the car is one of the 18-inch-wheel configurations. In this size, BFGoodrich options include the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, all in blackwall radial form. Rim-width compatibility in this fitment falls in the 7.5- to 9-inch range.

Once the size is confirmed, compare the tire series and supporting specifications that matter to your use of the car. Weight and load figures can help distinguish one tire from another, and wheel width should match the tire’s approved range. The right choice depends less on brand comparison here and more on matching the correct size, wheel package, and intended driving style.

For the 2023 Lexus IS300 fitments covered here, the available products come from BFGoodrich. The 18-inch 235/45R18 size is offered across several BFGoodrich g-Force series, while the 19-inch 235/40R19 fitment appears in the BFGoodrich g-Force Phenom T/A line. All of the listed options are radial blackwall tires.

Since the brand selection is concentrated, the real comparison is between tire series within the correct size rather than between multiple manufacturers. Start by confirming whether the car uses the 18-inch or 19-inch fitment, then compare the series offered in that size. Wheel-width range, load specification, and the overall character of the tire line are more useful than brand shopping alone in this case.

The 2023 Lexus IS300 tire options here are centered on BFGoodrich g-Force series. In 235/45R18, the available series include g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. In 235/40R19, the available series is g-Force Phenom T/A.

That means tire-series choice is broader for the 18-inch fitment than for the 19-inch Premium Package fitment. Buyers with 18-inch wheels can compare more than one g-Force family option, while 19-inch-wheel owners have a narrower but still size-correct path. Keeping the exact size first, then comparing series characteristics and wheel-width compatibility, is the practical way to narrow the choice.

A 2023 Lexus IS300 is a modern sport sedan, so a period-style approach is less about vintage sidewall treatments and more about preserving the intended wheel-and-tire presentation for the exact sub-model. That means staying with the correct primary size, either 235/45R18 or 235/40R19, and using a radial tire that suits the car’s contemporary appearance and handling character.

Appearance on this Lexus is closely tied to wheel diameter and sidewall profile, especially between the standard and Premium Package setups. Choosing the wrong rim diameter changes the visual balance immediately. If originality matters, match the car’s existing package first, then compare available blackwall performance tires within that size rather than trying to create a different look through a mismatched fitment.

Yes, correct tire fitment still matters on a 2023 Lexus IS300, even though it is not a traditional restoration-era vehicle. The right size helps preserve the car’s intended stance, wheel proportion, and package-specific appearance, and it keeps the tire matched to the correct 18-inch or 19-inch rim diameter used on that configuration.

A clean, well-kept modern car can lose its proper visual balance quickly when the wrong wheel diameter or tire profile is installed. Premium Package cars and standard cars do not share the same size, so package accuracy matters. For an appearance-minded replacement, keep the original fitment family intact and use the current wheel setup as the starting point for any tire decision.

Yes, modifications can affect tire fitment on a 2023 Lexus IS300. Aftermarket wheels, suspension changes, altered ride height, or body modifications can change the space available for the tire and may also move the wheel away from the original fitment assumptions. That matters on this car because the factory fitments already split between 18-inch and 19-inch wheel packages.

A modified IS300 should be checked for actual wheel diameter, width, and clearance at the fender, suspension, and steering range before replacement tires are chosen. Even when the tire size looks familiar, the wheel setup may no longer match the original configuration. Verifying the current hardware on the car is more useful than assuming the size still follows the original sub-model package.

Before driving a 2023 Lexus IS300 on new tires, inspect the wheel size, confirm that the tire size matches the car’s actual setup, and check that inflation is set properly for the installed tires. It is also worth looking over the wheels for damage and making sure the tires have proper clearance around the suspension, inner fender, and steering components.

A short road test should include attention to vibration, pulling, or rubbing that could point to a wheel, balance, or clearance issue. Recheck pressure after the first drives and keep an eye on uneven wear during early use. On a modern sedan like the IS300, small fitment errors tend to show up quickly, so catching them early helps protect both tire life and everyday drivability.

Tires on a 2023 Lexus IS300 should be inspected regularly, not just when tread looks low. A routine visual check for cuts, sidewall damage, bulges, uneven wear, and air loss is a smart habit, especially on a performance-oriented sedan where tire condition has a direct effect on steering feel and road behavior.

Monthly pressure checks are a good baseline, and the tires should also be looked over before longer trips or after any impact with potholes or curbs. Cars that sit for periods still need inspection because age, low pressure, and storage conditions can affect tire health. Staying ahead of small issues is the easiest way to keep the IS300’s correct tire setup working as intended.