The 2020 Lexus IS350 sits in the modern sport-sedan tradition, blending Lexus refinement with a chassis and stance that reward careful tire selection. For owners who enjoy the car as both a daily driver and an enthusiast machine, the tire decision is tied closely to wheel setup and whether the car uses a square or staggered arrangement. This model uses radial tire fitments in 225/45R17, 225/40R18, and 255/35R18 depending on configuration. Available choices include blackwall sport radials along with select raised white letter and redline options in 225/45R17. The key is matching the correct size to the exact setup before comparing series, sidewall appearance, and rim-width compatibility.
Which Tire Size Is Right for The 2020 Lexus IS350
Three tire sizes apply to the 2020 Lexus IS350, and the right one depends on the exact wheel setup. Some versions use a single 17-inch square fitment, while others use a staggered 18-inch arrangement with different front and rear sizes. Before choosing a tire, confirm whether the car has 17-inch wheels or the 18-inch front-and-rear combination, then match the tire to that position.
225/45R17 is a metric radial size in which 225 identifies the nominal section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 17 is the rim diameter in inches. On the 2020 Lexus IS350, this size suits the 17-inch wheel setup and keeps the selection centered on modern radial performance rather than vintage-style construction choices. Product options include BFGoodrich, Nitto, and Pro-Trac, with blackwall, raised white letter, and redline sidewall treatments available. This size is the one to evaluate when the car uses a square 17-inch arrangement and appearance matters as much as road behavior.
Fit(s): (AWD) Front, (RWD) Front, F Sport Black Line Special Edition Front, and F Sport Front
Construction: Radial|Rim: 18 in
225/40R18 is a metric radial size with a 225-millimeter nominal section width, a 40-series profile, and an 18-inch rim diameter. On the 2020 Lexus IS350, this size serves the front position on staggered 18-inch setups, so it should be selected with the front wheel location in mind rather than as a universal fitment for every configuration. Available choices include BFGoodrich and Nitto performance-oriented radial lines, all in blackwall form. This is the size to compare when the car has 18-inch front wheels and you want to focus on series choice, rim-width compatibility, and intended street use.
Fit(s): (AWD) Rear, (RWD) Rear, F Sport Black Line Special Edition Rear, and F Sport Rear
Construction: Radial|Rim: 18 in
255/35R18 is a wider metric radial size in which 255 denotes the nominal section width in millimeters, 35 is the aspect ratio, and 18 is the wheel diameter in inches. On the 2020 Lexus IS350, it belongs to the rear position of the staggered 18-inch setup, where its role differs from the narrower front tire. BFGoodrich and Nitto both offer blackwall options in several performance series, giving owners meaningful choice within the correct rear size. This is the rear size to verify when the car uses the staggered arrangement, especially if wheel changes or previous tire substitutions are part of the car's history.
Fitment on the 2020 Lexus IS350 varies by configuration rather than following one size across every version. Checking the exact sub-model and whether the car uses a square or staggered setup is the first step before comparing tire choices.
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2020 Lexus IS350 (AWD)
The 2020 Lexus IS350 (AWD) uses the 225/45R17 radial size when equipped in its 17-inch configuration. Tire selection here centers on choosing among available radial product lines and sidewall treatments while confirming that the car has not been changed to an 18-inch staggered setup.
The 2020 Lexus IS350 (AWD) Front uses 225/40R18 in a radial construction as part of the 18-inch staggered arrangement. That makes front-position fitment especially important, since the correct choice depends on matching the front wheel rather than treating the setup as a single-size package.
The 2020 Lexus IS350 (AWD) Rear uses the wider 255/35R18 radial size on the 18-inch staggered setup. Rear tire selection should be approached as a position-specific choice, with attention to wheel width, clearance, and keeping the rear size matched to the intended staggered arrangement.
The 2020 Lexus IS350 (RWD) uses 225/45R17 in its 17-inch square configuration. Buyers choosing tires for this version can focus on available radial series and sidewall appearance, while still confirming that the car has not been fitted with the alternate 18-inch wheel package.
The 2020 Lexus IS350 (RWD) Front uses 225/40R18 when equipped with the staggered 18-inch setup. Front tire selection should stay tied to the front wheel position, with the main decision becoming which radial series best suits the car's use and wheel specification.
The 2020 Lexus IS350 (RWD) Rear uses 255/35R18 on the rear of the staggered 18-inch package. Choosing this size correctly means verifying rear wheel fitment and comparing the available blackwall performance radials within the proper rear application.
2020 Lexus IS350 F Sport Black Line Special Edition Front
The 2020 Lexus IS350 F Sport Black Line Special Edition Front uses 225/40R18 in radial construction. That places the tire decision squarely on the front half of a staggered setup, so the right comparison is among the available 18-inch front options rather than square-fitment tires.
2020 Lexus IS350 F Sport Black Line Special Edition Rear
The 2020 Lexus IS350 F Sport Black Line Special Edition Rear uses 255/35R18 as its rear radial tire size. Rear-position confirmation matters here, especially when comparing product lines or checking whether aftermarket wheels have altered the original staggered relationship.
The 2020 Lexus IS350 F Sport Front uses 225/40R18 on an 18-inch rim. Tire choice here is about selecting the correct front radial size first, then narrowing the decision by brand, tire series, and wheel-width compatibility.
The 2020 Lexus IS350 F Sport Rear uses the 255/35R18 radial size at the rear axle. The practical takeaway is to verify the rear wheel specification and keep the tire choice consistent with the staggered front-and-rear arrangement used on this 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 2020 Lexus IS350 Tires for Sale
Available 2020 Lexus IS350 tires span 225/45R17, 225/40R18, and 255/35R18 radial fitments from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare blackwall performance series across all three sizes, with raised white letter and redline choices also appearing in 225/45R17.
Common 2020 Lexus IS350 tire questions usually come down to identifying the correct wheel setup, understanding the square versus staggered fitments, and comparing available radial series, sidewall styles, and maintenance checks before regular road use.
Tire Size & Fitment
What tire size fits a 2020 Lexus IS350?
The 2020 Lexus IS350 uses three possible tire sizes: 225/45R17, 225/40R18, and 255/35R18. The 225/45R17 size applies to 17-inch square setups, while 225/40R18 and 255/35R18 are used together on staggered 18-inch configurations, with the narrower size at the front and the wider size at the rear.
The practical question is not simply which size exists, but which setup is on the car. A quick check of wheel diameter and whether the front and rear tire sizes match will usually tell you whether the IS350 is using the 17-inch arrangement or the 18-inch staggered package.
What size rim does a 2020 Lexus IS350 use?
The 2020 Lexus IS350 uses either a 17-inch or 18-inch rim, depending on configuration. The 225/45R17 fitment belongs on a 17-inch wheel, while the 225/40R18 front and 255/35R18 rear sizes belong on 18-inch wheels.
Rim diameter should be confirmed before any tire comparison begins, because a 17-inch tire cannot be mounted on an 18-inch wheel, and vice versa. On cars with staggered fitment, it also helps to verify that both axles still use the intended 18-inch setup and have not been altered by aftermarket wheels.
Why does the 2020 Lexus IS350 have more than one tire size?
More than one tire size appears because the 2020 Lexus IS350 was offered in both a square 17-inch fitment and a staggered 18-inch fitment. In the staggered arrangement, the front uses 225/40R18 and the rear uses 255/35R18, while the 17-inch setup uses 225/45R17 at all four corners.
That means the first step is identifying the exact wheel and tire layout on the car rather than selecting by model name alone. Looking at the current tire sidewalls and confirming whether front and rear sizes match will help prevent ordering a front tire for a rear position or mixing 17-inch and 18-inch fitments.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 Lexus IS350?
Start with the correct size and wheel position, since the 2020 Lexus IS350 may use 225/45R17 all around or a staggered 225/40R18 front and 255/35R18 rear combination. From there, compare radial construction details such as tire series, sidewall style, rim-width compatibility, and load figures where they are stated.
The right choice depends on how the car is used and how closely the existing wheel setup matches stock dimensions. A square 17-inch car gives more freedom to focus on sidewall appearance, while an 18-inch staggered car requires closer attention to front-versus-rear placement and wheel-width suitability.
What sidewall styles are available for 2020 Lexus IS350 tires?
Blackwall is the most common sidewall style across the available 2020 Lexus IS350 tire options. In 225/45R17, there are also raised white letter and redline choices, giving that size a broader appearance range than the 18-inch front and rear fitments, which are offered in blackwall form.
That makes sidewall style a real selection factor mainly for owners running the 17-inch setup. Owners with 18-inch staggered fitment will usually be choosing more by series and wheel compatibility, while 17-inch buyers can weigh both performance-oriented tire lines and a more customized visual presentation.
What brands offer tires for the 2020 Lexus IS350?
Tires for the 2020 Lexus IS350 are available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears across all three fitment sizes in several g-Force lines, Nitto offers NT555 G2 choices in each applicable size, and Pro-Trac appears in 225/45R17 with distinct sidewall treatments.
Brand choice should come after size and wheel-position confirmation. Once the correct fitment is established, compare each brand's available series, sidewall presentation, and rim-width specifications to see which option best suits the car's current setup and the kind of street use the IS350 will see.
Restoration & Appearance
Which tire should I choose for a period-style 2020 Lexus IS350?
A period-style approach on a 2020 Lexus IS350 usually means staying with the correct original-size format for the wheel package already on the car. That could be 225/45R17 on a square setup or the 225/40R18 front and 255/35R18 rear combination on a staggered setup, all in modern radial construction.
Appearance choice becomes more visible in the 17-inch size, where blackwall, raised white letter, and redline options are available. Owners aiming for a more authentic presentation should confirm the wheel package first, then compare sidewall style carefully rather than assuming any visual treatment is automatically right for every IS350.
How does tire construction affect the appearance of a restored 2020 Lexus IS350?
On the 2020 Lexus IS350, tire construction is straightforward because the primary fitments are radial. That keeps the appearance discussion focused less on bias-ply versus radial shape and more on the correct modern size, sidewall presentation, and whether the car is using the intended square or staggered wheel arrangement.
A car on 225/45R17 has the widest visual range because that size includes blackwall, raised white letter, and redline choices. On 18-inch front and rear fitments, the look stays more contemporary through blackwall performance radials, so wheel package accuracy becomes the main visual factor rather than construction type.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Lexus IS350?
Yes, modifications can change tire fitment on a 2020 Lexus IS350 even when the tire size itself looks correct on paper. Aftermarket wheels, altered wheel widths, suspension changes, or body-height changes can affect how 225/45R17, 225/40R18, or 255/35R18 tires sit within the fenders and steering arc.
That is especially important on staggered 18-inch setups, where front and rear tires already serve different positions. Checking wheel diameter, wheel width, and clearance at full steering lock and suspension movement helps avoid assuming that a stock-size tire will behave the same way on a modified car.
What should I inspect before driving a 2020 Lexus IS350 on new tires?
Before driving a 2020 Lexus IS350 on new tires, inspect the wheels for damage, confirm the tire sizes match the car's actual setup, and check that each tire is mounted in the correct front or rear position. It is also smart to look for proper inflation, secure valve stems, and any obvious rubbing or clearance issues.
A short test drive followed by another visual check can reveal problems early. Pay attention to steering feel, vibration, and any contact marks inside the wheelhouse, especially on staggered 18-inch cars where front and rear sizes differ and wheel-position mistakes are easier to make.
How often should tires on a 2020 Lexus IS350 be inspected?
Tires on a 2020 Lexus IS350 should be inspected regularly for pressure, tread wear, cuts, bulges, and sidewall damage, with extra attention before longer drives or after the car has been parked for extended periods. On a performance-oriented sedan, uneven wear can also signal alignment or suspension concerns that deserve attention.
Frequent inspection matters even more when the car uses a staggered setup, because front and rear tires cannot simply be treated as one interchangeable group. Checking wear patterns by axle helps catch fitment or chassis issues sooner and protects the usefulness of the correct 17-inch or 18-inch tire package.
