The 2017 Lexus GS350 sits in the modern sport-luxury sedan class, blending rear-drive dynamics, sharp styling, and the kind of refinement buyers expect from Lexus. It is a car that rewards attention to setup, especially when tire size changes between standard and F Sport configurations. This GS350 uses radial tire fitments in 235/45R18, 235/40R19, and 265/35R19 depending on sub-model and axle position. Available choices center on blackwall performance-oriented tires from BFGoodrich and Nitto across several g-Force and NT555 series options. The key is matching the exact sub-model and wheel package first, then choosing the tire character that suits daily driving, sport use, and overall appearance.
Which Tire Size Is Right for The 2017 Lexus GS350
The 2017 Lexus GS350 uses three primary tire sizes, and the right one depends on the exact sub-model and wheel setup. Two rim diameters are involved, 18-inch and 19-inch, and the F Sport RWD configuration also uses a staggered arrangement with a different rear size. The first step is confirming whether the car is Base or F Sport, then verifying wheel diameter and, on F Sport RWD cars, front versus rear position before selecting a tire.
Fit(s): Base, F Sport (AWD), and F Sport (RWD) Front
Construction: Radial|Rim: 19 in
235/40R19 is a metric radial size where 235 identifies the nominal section width in millimeters, 40 is the aspect ratio, R denotes radial construction, and 19 is the wheel diameter in inches. On the 2017 Lexus GS350, this size is part of the 19-inch fitment used on certain F Sport and Base configurations. Available choices include blackwall performance tires from BFGoodrich, with the g-Force Phenom T/A represented in this size. It is the right size to evaluate when the car already wears 19-inch front wheels and the goal is to preserve the intended wheel-and-tire proportion.
235/45R18 is a metric radial size with a 235-millimeter nominal section width, a 45-series profile, radial construction, and an 18-inch rim diameter. On the 2017 Lexus GS350, this size belongs to the 18-inch setup used on Base models equipped with that wheel package. Tire choices in this size include several BFGoodrich blackwall options across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. This is the size to compare when the car uses 18-inch wheels and the decision is more about tire series and intended driving character than basic fitment.
265/35R19 is a metric radial size in which 265 is the nominal section width in millimeters, 35 is the aspect ratio, R indicates radial construction, and 19 is the rim diameter in inches. For the 2017 Lexus GS350, this size serves the rear position on the F Sport RWD staggered setup rather than every configuration. Blackwall options are available from BFGoodrich and Nitto, including g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 lines. It should be considered only after confirming that the car uses the wider 19-inch rear wheel arrangement.
Sub-model fitment matters on the 2017 Lexus GS350 because tire size changes with wheel package and, in F Sport RWD form, by axle position as well. Identifying the exact version of the car is the quickest way to avoid choosing an 18-inch standard fitment for a 19-inch setup or missing a staggered rear tire requirement.
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2017 Lexus GS350 Base
The 2017 Lexus GS350 Base uses either an 18-inch or 19-inch radial fitment, so wheel diameter needs to be confirmed before selecting a tire. Once that is settled, the decision shifts to choosing among the available blackwall performance-oriented options in the correct size.
The 2017 Lexus GS350 F Sport (AWD) uses the 235/40R19 radial size, keeping fitment straightforward at the front-to-rear level. Tire selection then comes down to staying with the correct 19-inch size while comparing the available series for the kind of road use and response the car will see.
The front of the 2017 Lexus GS350 F Sport (RWD) uses 235/40R19, making it part of a staggered 19-inch setup rather than a same-size arrangement all around. Choosing tires here means preserving the correct front size while making sure it works as part of the wider front-and-rear pairing.
The rear of the 2017 Lexus GS350 F Sport (RWD) uses 265/35R19, which is wider than the front tire and specific to the staggered rear position. That makes rear-tire selection more specialized, with attention focused on the correct 19-inch rear fitment and the available blackwall performance tire choices in that size.
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 2017 Lexus GS350 Tires for Sale
Available 2017 Lexus GS350 tires center on radial blackwall performance options from BFGoodrich, with Nitto also offered in 265/35R19. The product grid mainly lets buyers compare size-specific series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, along with rim-width compatibility where stated.
The most useful 2017 Lexus GS350 tire questions usually come down to exact size by sub-model, 18-inch versus 19-inch wheel fitment, staggered F Sport setups, and how to compare the available performance-oriented tire choices before road use.
Tire Size & Fitment
What tire size fits a 2017 Lexus GS350?
The 2017 Lexus GS350 uses 235/45R18, 235/40R19, or 265/35R19 depending on the exact sub-model and wheel arrangement. Base models may use either 235/45R18 or 235/40R19, while 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.
The practical step is to confirm the exact version of the car and the wheel diameter already on it before choosing a tire. A GS350 with 18-inch wheels needs a different fitment than one with 19-inch wheels, and an F Sport RWD should not be treated as a same-size setup at all four corners.
What size rim does a 2017 Lexus GS350 use?
The 2017 Lexus GS350 uses either an 18-inch or 19-inch rim, depending on configuration. The 235/45R18 size mounts on an 18-inch wheel, while both 235/40R19 and 265/35R19 are 19-inch fitments, with the 265/35R19 serving the rear position on the F Sport RWD staggered setup.
Wheel diameter should be confirmed before looking at brand or tire series, because an 18-inch tire and a 19-inch tire are not interchangeable. On cars that have seen wheel changes, it is also worth checking actual wheel width and front-to-rear differences so the new tire matches the current setup rather than the assumed one.
Do all 2017 Lexus GS350 sub-models use the same tire size?
No, 2017 Lexus GS350 sub-models do not all use the same tire size. Base models can use either 235/45R18 or 235/40R19, the F Sport AWD uses 235/40R19, and the F Sport RWD uses 235/40R19 in front with 265/35R19 in the rear.
That variation matters because the tire decision starts with identifying the sub-model, not just the model name on the trunk. Buyers should verify whether the car is Base or F Sport, whether it is AWD or RWD, and whether the car still has its intended wheel package before comparing tread design, brand, or performance-oriented series.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Lexus GS350?
Start with the exact tire size and wheel diameter the car uses, because the 2017 Lexus GS350 spans 18-inch and 19-inch fitments and may also use a staggered rear size. Once size is confirmed, compare construction, tire series, rim-width compatibility where stated, and whether the tire suits the way the car is actually driven.
A Base model on 18-inch wheels presents a different choice than an F Sport RWD with wider rear tires. It helps to look at sidewall style, weight, and load figures where available, but those details matter only after the correct front or rear size is matched to the car's current wheel and suspension setup.
What sidewall styles are available for 2017 Lexus GS350 tires?
The available 2017 Lexus GS350 tires in these fitments use a blackwall sidewall style. That applies across the current 235/40R19, 235/45R18, and 265/35R19 product choices, giving the car a clean modern performance look rather than a whitewall, redline, or raised-letter presentation.
Since sidewall appearance is consistent here, the more meaningful differences are tire series, brand availability, and size-specific fitment. Buyers choosing for appearance can expect a straightforward contemporary look, while those choosing for use should focus next on whether the car runs 18-inch or 19-inch wheels and whether it needs a staggered rear tire.
What brands offer tires for the 2017 Lexus GS350?
BFGoodrich offers tires for all three 2017 Lexus GS350 sizes covered here, and Nitto is also available in 265/35R19. Within BFGoodrich, the fitments include g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series, while the 265/35R19 rear size can also be matched with the Nitto NT555 G2.
Brand choice should follow fitment rather than lead it, especially on cars with different front and rear sizes. A buyer comparing brands should first confirm the exact wheel package, then look at which series are offered in that size and whether the published rim-width range aligns with the wheels currently on the car.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Lexus GS350?
A period-style approach on a 2017 Lexus GS350 usually means keeping the original sizing theme and modern blackwall appearance intact rather than trying to create a vintage look. That starts with using the correct 235/45R18, 235/40R19, or 265/35R19 fitment for the exact sub-model and choosing among the available radial performance series in that size.
Appearance and proportion matter on a modern sport-luxury sedan, so the wheel-and-tire relationship should stay true to the car's intended setup. Buyers preserving a clean, factory-inspired presentation should verify wheel diameter and, on F Sport RWD cars, maintain the staggered front-to-rear sizing rather than treating all four corners the same.
Does correct tire fitment matter for a 2017 Lexus GS350 restoration or preservation project?
Yes, correct tire fitment matters on a 2017 Lexus GS350 because wheel diameter, aspect ratio, and front-to-rear sizing all influence the car's stance and visual balance. Using the proper 18-inch or 19-inch fitment, and preserving the wider rear tire on F Sport RWD cars, helps maintain the look associated with the car's intended configuration.
For a preservation-minded car, the right tire is not just about mounting any modern radial that fits the rim. It is about matching the exact size pattern already tied to that version of the GS350, then selecting a tire series that suits the owner's driving plans without changing the car's appearance or wheel relationship unnecessarily.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Lexus GS350?
Yes, modifications can affect tire fitment on a 2017 Lexus GS350 even when the tire size itself is correct for a stock configuration. Aftermarket wheels, altered wheel widths, suspension changes, alignment adjustments, or lowering can all change how a 235/45R18, 235/40R19, or 265/35R19 tire sits in the wheelwell.
A modified car should be checked for actual wheel diameter and width, plus front and rear clearance at full steering lock and suspension movement. On an F Sport RWD, special attention belongs on the staggered setup so the wider rear tire still has proper room and remains matched to the wheels currently on the car.
What should I inspect before driving a 2017 Lexus GS350 on new tires?
Before driving a 2017 Lexus GS350 on new tires, inspect tire pressure, wheel condition, valve stems, and the basic condition of the suspension and alignment. It is also worth confirming that the front and rear sizes are correct for the car, especially if it is an F Sport RWD with 235/40R19 in front and 265/35R19 in the rear.
A short visual check can prevent avoidable problems once the car is back on the road. Look for rubbing marks, uneven old-tire wear, damage at the wheel lip, and any sign that previous wheel or suspension work changed the available clearance, then recheck inflation and general tire condition after the first few drives.
How often should tires on a 2017 Lexus GS350 be inspected?
Tires on a 2017 Lexus GS350 should be inspected regularly for pressure loss, uneven wear, cuts, bulges, and sidewall damage, with extra attention before longer drives or after the car has been sitting. Performance-oriented fitments with lower-profile sidewalls can also make wheel-edge damage and alignment-related wear easier to miss if checks are infrequent.
Regular inspection is especially helpful on a car that may alternate between commuting and more spirited use. It helps to compare front and rear wear patterns on staggered F Sport RWD setups, keep pressures consistent, and address small issues early before they affect ride quality, handling response, or tire service life.
