The 1998 Lexus GS400 sits at an interesting point in late-1990s luxury performance, blending the quiet, refined character expected of Lexus with a stronger emphasis on V8 power and rear-wheel-drive balance. Buyers looking at this car today are often trying to preserve that mix of comfort, stance, and road manners. Tire fitment for the 1998 Lexus GS400 centers on radial sizes 225/55R16 and 235/45R17, so the first step is confirming which wheel diameter is on the car. From there, the choice is less about vintage construction and more about selecting the right metric radial, tire series, and wheel-compatible fitment for the way the car is actually driven.
Which Tire Size Is Right for The 1998 Lexus GS400
The 1998 Lexus GS400 uses two primary tire sizes, and the correct one depends on which wheel diameter is on the car: 16-inch or 17-inch. Both sizes are radial metric fitments, and the GS400 Base can use either size, so confirming the actual wheels on the car is the first step before comparing tire series, brand choices, and rim-width compatibility.
225/55R16 is a metric radial size in which 225 identifies the nominal section width in millimeters, 55 is the aspect ratio, R designates radial construction, and 16 is the wheel diameter in inches. On the 1998 Lexus GS400, this size suits a 16-inch wheel setup and keeps the selection focused on modern radial performance-touring style fitment. Available choices in this size include BFGoodrich options from the g-Force Sport Comp 2 and g-Force Comp 2 AS series, both in Blackwall form. This size is the one to evaluate if the car still runs 16-inch wheels and you want to compare tire character within that wheel package.
235/45R17 is a metric radial size where 235 is the nominal section width in millimeters, 45 indicates the aspect ratio, R marks radial construction, and 17 identifies the wheel diameter in inches. For a 1998 Lexus GS400 with 17-inch wheels, this size opens up a slightly broader selection across performance-oriented radial offerings. BFGoodrich and Nitto both appear here, with Blackwall tires offered in series such as g-Force Sport Comp 2, g-Force Comp 2 AS, and NT555 G2. This is the size to compare when the car has the larger wheel package and tire choice may influence both appearance and intended road use.
Fitment is straightforward here because the covered 1998 Lexus GS400 sub-model shares the same two radial tire-size paths. What matters most is not trim identification so much as confirming whether the car is wearing 16-inch or 17-inch wheels before selecting a tire.
1
1998 Lexus GS400 Base
The 1998 Lexus GS400 Base can use either of the two primary radial tire sizes tied to this model, depending on the wheel diameter fitted to the car. Tire selection starts with confirming the current 16-inch or 17-inch wheel setup, then comparing the available Blackwall performance-oriented product choices within 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 1998 Lexus GS400 Tires for Sale
Available 1998 Lexus GS400 tires focus on modern radial fitment in 225/55R16 and 235/45R17, with BFGoodrich and Nitto represented across Blackwall performance-oriented series. The main comparisons in the product grid are wheel-size compatibility, tire series, and rim-width range within each size.
Common 1998 Lexus GS400 tire questions usually come down to choosing between the two correct metric radial sizes, confirming wheel diameter, and comparing available brands and tire series for the way the car is used today.
Tire Size & Fitment
What tire size fits a 1998 Lexus GS400?
A 1998 Lexus GS400 uses either 225/55R16 or 235/45R17, and both are radial metric tire sizes. The GS400 Base is associated with both sizes, so the correct fitment depends on which wheel package is actually on the car rather than a construction choice between bias-ply and radial.
The practical next step is to confirm the wheel diameter before ordering tires. A 16-inch wheel calls for the 225/55R16 fitment path, while a 17-inch wheel uses 235/45R17, and the car should also be checked for any aftermarket wheel or suspension changes that may affect tire selection.
What size rim does a 1998 Lexus GS400 use?
The 1998 Lexus GS400 uses either a 16-inch or 17-inch rim, matching its two tire sizes: 225/55R16 and 235/45R17. That means wheel diameter is central to tire selection on this model, because each tire size is tied directly to a different rim size.
Checking the actual wheels on the car matters more than assuming one setup or the other. Many cars from this era have been changed over time, so confirming both diameter and width helps narrow the right tire choices and keeps the search focused on products built for that wheel package.
Does the 1998 Lexus GS400 Base use the same tire size?
The 1998 Lexus GS400 Base is connected to both primary tire sizes used on this model: 225/55R16 and 235/45R17. Rather than one exclusive size for the Base, tire fitment depends on whether the car is equipped with 16-inch or 17-inch wheels.
That makes wheel confirmation the real decision point. Once the wheel diameter is known, the choice becomes more straightforward and shifts toward comparing available radial tire series, brand options, and rim-width compatibility instead of trying to sort between different sub-model-specific tire constructions.
Choosing the Right Tire
What should I consider when choosing a 1998 Lexus GS400 tire?
Start with the correct size for the wheel on the car, since the 1998 Lexus GS400 uses either 225/55R16 or 235/45R17. From there, compare tire series, rim-width compatibility, and whether the tire suits the car's intended use, whether that is everyday road driving, occasional spirited use, or a more preservation-minded approach.
This GS400 is a late-1990s luxury performance sedan, so the tire choice should support both fitment and character. Looking at construction is simple here because the available options are radial, leaving wheel match, brand, product series, and the current condition of the car's suspension and alignment as the more meaningful decision factors.
What sidewall styles are available for 1998 Lexus GS400 tires?
The available tires for the 1998 Lexus GS400 in these sizes use a Blackwall sidewall style. That keeps the appearance modern and understated, which suits the car's original late-1990s luxury-sport presentation without introducing period whitewall or stripe treatments that belong to much earlier vehicles.
Because the sidewall treatment does not vary here, the visual choice is simpler than it would be on a classic restoration page. Most of the comparison instead comes down to tire size, wheel diameter, brand, and series, especially if the goal is to preserve the clean, factory-era look of the GS400.
What brands offer tires for the 1998 Lexus GS400?
BFGoodrich and Nitto both offer tires in sizes used by the 1998 Lexus GS400. BFGoodrich appears in both 225/55R16 and 235/45R17 through the g-Force Sport Comp 2 and g-Force Comp 2 AS lines, while Nitto appears in 235/45R17 with the NT555 G2 series.
Brand alone should not decide the purchase. It is better to confirm the wheel size first, then compare the tire series available in that exact size, along with the stated rim-width range and the way the car will actually be driven, stored, and maintained.
Restoration & Appearance
Which tire should I choose for a period-style 1998 Lexus GS400?
A period-style 1998 Lexus GS400 tire choice starts with keeping the correct wheel-size-based fitment, either 225/55R16 or 235/45R17. Since the available options here are modern radial Blackwall tires, the most authentic-looking approach usually comes from matching the size and overall visual proportion appropriate to the wheel setup already on the car.
Because this is a late-1990s luxury sport sedan, appearance choices are subtler than on an earlier collector car with whitewalls or redlines. Tire series still matter, but preserving the right stance and avoiding an obviously mismatched wheel-and-tire combination will usually do more for the car's period feel than chasing cosmetic details alone.
Does correct tire fitment matter for a 1998 Lexus GS400 restoration?
Correct tire fitment matters on a 1998 Lexus GS400 restoration because wheel diameter and tire profile strongly affect the car's stance, visual balance, and road manners. Using 225/55R16 on a 16-inch wheel or 235/45R17 on a 17-inch wheel keeps the restoration process tied to known GS400 fitment paths.
A restoration-minded owner should look beyond tread alone and confirm that the wheel package matches the intended presentation of the car. If originality is especially important, checking period sales material, marque references, or vehicle-specific documentation can help settle which wheel-and-tire combination best suits that particular GS400.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1998 Lexus GS400?
Yes, modifications can affect tire fitment on a 1998 Lexus GS400 even when the tire size itself is one of the correct GS400 sizes. Aftermarket wheels, altered wheel width, offset changes, lowering, or suspension work can all change the way a 225/55R16 or 235/45R17 tire sits in the wheel opening.
A car with modifications should be checked for steering clearance, fender clearance, and actual wheel dimensions before replacing tires. That step matters especially on a performance-oriented sedan, because a tire that matches the nominal size may still need closer review if the chassis or wheel package no longer reflects stock geometry.
What should I inspect before driving a 1998 Lexus GS400 on new tires?
Before driving a 1998 Lexus GS400 on new tires, inspect the wheels for damage, confirm the wheel diameter matches the tire size, and make sure the tires are mounted correctly and inflated properly. It also helps to look at alignment condition, suspension wear, and any signs that the old tires were rubbing or wearing unevenly.
A short initial road check is worthwhile after installation. Pay attention to vibration, pulling, unusual noise, and visible clearance around the inner fender and suspension, especially if the car has replacement wheels or has sat unused for long periods and may have age-related chassis issues beyond the tires themselves.
How often should tires on a 1998 Lexus GS400 be inspected?
Tires on a 1998 Lexus GS400 should be inspected regularly, not just when tread looks low. A late-1990s car may spend periods in storage or see intermittent use, so sidewall condition, air retention, uneven wear, cuts, and bulges deserve just as much attention as remaining tread depth.
Routine checks become even more important if the car is driven infrequently, parked for long stretches, or used for longer highway trips after sitting. Looking over the tires before road use helps catch aging, pressure loss, or clearance problems early, and it also gives the owner a chance to spot alignment or suspension issues.
