The 2018 Volvo S90 brought Volvo’s modern full-size sedan design into a clean, understated luxury package, blending long-wheelbase presence with a more contemporary Scandinavian character than many traditional executive sedans. For owners, tire selection is less about vintage-style construction and more about matching the car’s exact wheel package, because the S90 uses radial sizes ranging from 245/45R18 to 255/40R19 and 255/35R20 depending on trim. That creates meaningful choice in profile, rim diameter, and sidewall presentation, with mostly blackwall options plus select RWL and redline offerings in some sizes. The right decision starts with confirming the sub-model and wheel diameter already on the car.
Which Tire Size Is Right for The 2018 Volvo S90
The 2018 Volvo S90 uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel diameter. All three are radial fitments, but they are spread across 18-inch, 19-inch, and 20-inch rims, so the first step is confirming which wheel package is on the car before comparing tire series, sidewall treatments, or brand choices.
245/45R18 is a metric radial size in which 245 is the nominal section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2018 Volvo S90, this size supports an 18-inch wheel setup with a more conventional modern sedan profile than the lower-profile larger-diameter alternatives. Available choices include BFGoodrich and Nitto in blackwall form across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size is the one to evaluate when the car is equipped with 18-inch wheels and a trim that uses that package.
255/40R19 is a metric radial size that uses a 255-millimeter nominal section width, a 40-series profile, and a 19-inch rim diameter. For the 2018 Volvo S90, it is the most broadly shared fitment across the lineup and serves as the common point between several Momentum and Inscription configurations. Product choices are wider here, including BFGoodrich and Pro-Trac, with blackwall, raised white letter, and redline sidewall treatments depending on the tire series. This is the size to focus on when the car has 19-inch wheels and the goal is to compare both appearance and tire-series character within the correct fitment.
255/35R20 is a metric radial size with the same nominal width as 255/40R19, but it uses a lower 35-series profile on a 20-inch rim. On the 2018 Volvo S90, this size belongs to specific upper-trim wheel packages and gives the buyer a different wheel-and-tire presentation than the 18-inch or 19-inch setups. BFGoodrich, Nitto, and Pro-Trac options are available here, with blackwall styles as well as select RWL and redline offerings in the Street Pro III series. This size should only be considered for S90 configurations already using the 20-inch wheel package or an equivalent verified setup.
Tire fitment on the 2018 Volvo S90 varies by sub-model, and several trims can use more than one wheel-and-tire package. Checking the exact Momentum, Inscription, T5, T6, or T8 configuration matters before selecting a tire, especially because rim diameter changes across the available sizes.
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2018 Volvo S90 T5 Momentum
The 2018 Volvo S90 T5 Momentum uses radial tires and can be equipped with either an 18-inch or 19-inch fitment. Tire selection starts with confirming which wheel package is on the car, then comparing the available brands and tire series within that exact size.
The 2018 Volvo S90 T6 Inscription uses radial fitments tied to either a 19-inch or 20-inch wheel package. That means the practical decision is not just choosing a tire model, but first verifying whether the car is set up for the 19-inch or lower-profile 20-inch size.
The 2018 Volvo S90 T6 Momentum can use radial tire packages on either 18-inch or 19-inch wheels. Owners should confirm the wheel diameter on the car before comparing blackwall tire options and the available series in the correct size.
The 2018 Volvo S90 T8 Inscription uses radial tires and may be equipped with either a 19-inch or 20-inch setup. Choosing correctly depends on identifying the wheel package first, then narrowing the tire by profile, sidewall treatment, and tire series.
The 2018 Volvo S90 T8 Momentum uses a single radial fitment path centered on the 19-inch wheel package. That makes the tire decision more straightforward, with the focus shifting to available brands, sidewall style, and tire-series preference within the correct 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 2018 Volvo S90 Tires for Sale
Available 2018 Volvo S90 tires center on the three primary radial sizes and include BFGoodrich, Nitto, and Pro-Trac options. Buyers can compare blackwall choices across several performance-oriented series, with select 19-inch and 20-inch fitments also offered in RWL and redline sidewall styles.
Owners usually need to sort out three things on a 2018 Volvo S90: the exact tire size for the sub-model and wheel package, the available tire-series and sidewall choices, and the checks to make before regular road use.
Tire Size & Fitment
What tire size fits a 2018 Volvo S90?
The 2018 Volvo S90 uses three primary radial tire sizes: 245/45R18, 255/40R19, and 255/35R20. The correct size depends on the exact sub-model and wheel package, with some Momentum trims using 18-inch or 19-inch fitments and some Inscription trims using 19-inch or 20-inch fitments.
The safest way to narrow it down is to confirm the wheel diameter already on the car and then match the tire size to that setup. A 19-inch S90 should be evaluated very differently from an 18-inch or 20-inch car, even though the model name is the same across the lineup.
What size rim does a 2018 Volvo S90 use?
A 2018 Volvo S90 can use 18-inch, 19-inch, or 20-inch rims, depending on the tire size and sub-model configuration. The 245/45R18 size uses an 18-inch rim, 255/40R19 uses a 19-inch rim, and 255/35R20 uses a 20-inch rim.
That wheel diameter needs to be confirmed before buying tires, because the three sizes are not simply interchangeable versions of one another. Looking at the sidewall on the current tire or verifying the wheel itself is the quickest way to avoid ordering an 18-inch tire for a 19-inch or 20-inch setup.
Why does the 2018 Volvo S90 have more than one tire size?
The 2018 Volvo S90 has more than one tire size because different sub-models and wheel packages use different rim diameters and tire profiles. Across the lineup, the car appears with 18-inch, 19-inch, and 20-inch fitments, so the correct tire is tied to the trim and the wheels actually installed.
That means the tire decision starts with identifying the exact S90 configuration rather than choosing by model name alone. It also helps to confirm whether the car still carries its original wheel package, since aftermarket wheels or a replacement wheel set can change what size should be considered.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Volvo S90?
Start with the correct size for the exact 2018 Volvo S90 sub-model and wheel diameter, since the car uses 245/45R18, 255/40R19, or 255/35R20 depending on configuration. After size is settled, compare radial tire series, sidewall style, brand, and any rim-width or load details that apply within that size.
The buying decision often comes down to whether the priority is maintaining the car’s current wheel-and-tire look or choosing a different tire-series character in the same fitment. It also helps to compare the current wheel setup closely, especially if the car has been fitted with non-original wheels since new.
What sidewall styles are available for 2018 Volvo S90 tires?
Sidewall choices for the 2018 Volvo S90 include blackwall across all three primary sizes, with additional RWL and redline options available in certain 19-inch and 20-inch fitments. Those non-blackwall choices appear in the Pro-Trac Street Pro III offerings for 255/40R19 and 255/35R20.
For most S90 owners, blackwall will be the most familiar modern presentation, while RWL or redline adds a more custom or enthusiast-oriented look. Appearance should still come second to the correct size and wheel diameter, because a preferred sidewall treatment is only useful when it matches the car’s actual fitment.
What brands offer tires for the 2018 Volvo S90?
Tires for the 2018 Volvo S90 are available from BFGoodrich, Nitto, and Pro-Trac, depending on the size. BFGoodrich appears across all three fitments in several g-Force series, Nitto is available in selected sizes through the NT555 G2 line, and Pro-Trac adds Street Pro III options in certain 19-inch and 20-inch applications.
Brand choice should be considered after the correct tire size is confirmed, since not every brand appears in every S90 fitment. It is also useful to compare the tire series and sidewall presentation within that brand selection, because a blackwall-only option serves a different visual goal than RWL or redline.
Restoration & Appearance
Which tire should I choose for a period-style 2018 Volvo S90?
A period-style approach for a 2018 Volvo S90 usually means staying with the correct factory-era size and preserving the wheel diameter and overall presentation already associated with that trim. In practice, that points most owners toward one of the blackwall radial choices in 245/45R18, 255/40R19, or 255/35R20.
The S90 is modern enough that originality is usually tied more to wheel package and tire proportions than to vintage sidewall themes. Anyone trying to mirror a specific showroom-era appearance should compare the current wheel setup against vehicle-specific delivery paperwork, window-sticker information, or marque reference material before changing sizes.
How does tire construction affect the appearance of a restored 2018 Volvo S90?
On a 2018 Volvo S90, construction is straightforward because the primary fitments are all radial. That means appearance differences come less from bias-ply versus radial questions and more from the chosen size, the wheel diameter it belongs to, and whether the sidewall is blackwall, RWL, or redline.
A lower-profile 20-inch fitment gives the car a different visual stance than an 18-inch setup, even within the same model line. Owners focused on a clean restoration-oriented presentation usually benefit from keeping the tire size aligned with the correct wheel package and choosing a sidewall style that suits the intended look.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Volvo S90?
Yes, modifications can affect tire fitment on a 2018 Volvo S90, especially if the car has aftermarket wheels, suspension changes, or altered ride height. The S90 already uses more than one wheel-and-tire package from the start, so changes in rim diameter, wheel width, or offset can shift what tire size should be evaluated.
Checking the actual wheels on the car matters more than relying on the model name alone. Clearance at the fender, inner wheelhouse, and steering range should be reviewed carefully whenever the car differs from its original wheel package, particularly when moving between 18-inch, 19-inch, and 20-inch fitments.
What should I inspect before driving a 2018 Volvo S90 on new tires?
Before driving a 2018 Volvo S90 on new tires, inspect wheel condition, confirm the correct tire size for the car’s wheel package, and make sure each tire is mounted on the proper rim diameter. It is also smart to check for uneven wear patterns, visible suspension issues, and any signs that the previous tires were rubbing.
A short road test should be followed by another look at inflation pressure and basic clearance, especially near full steering lock. Any vibration, pull, or contact mark deserves attention early, since the S90’s different 18-inch, 19-inch, and 20-inch combinations leave less room for guesswork than a single-size application.
How often should tires on a 2018 Volvo S90 be inspected?
Tires on a 2018 Volvo S90 should be inspected regularly, not just when tread looks worn. A quick check for pressure loss, cuts, bulges, sidewall damage, or irregular wear helps catch issues before they become more expensive or harder to diagnose, especially on a sedan that may see mixed highway and city use.
It also helps to inspect whenever the car has been parked for an extended period or after striking rough pavement. Since the S90 can use low-profile 19-inch and 20-inch fitments, wheel damage and edge wear deserve close attention, and any unusual wear should prompt a review of alignment and suspension condition.
