The 2026 Audi S5 sits in the modern sport-luxury space where sharp styling, everyday drivability, and strong road manners all matter. Buyers looking at this exact car are usually balancing performance feel with the clean, planted look that suits an S-badged Audi coupe or Sportback. Tire fitment centers on two radial sizes, 245/40R19 and 245/35R20, so the first step is confirming which wheel package is on the car. From there, the decision shifts to series selection, brand choice, and the slightly different character that comes with a 19-inch or 20-inch setup. Any change should be checked against the car's actual wheel size and overall clearance.
Which Tire Size Is Right for The 2026 Audi S5
The 2026 Audi S5 uses two primary tire sizes, and the correct one depends on the sub-model and wheel package. Both are metric radial fitments, but they use different rim diameters, so confirming whether the car has 19-inch or 20-inch wheels is the first step before comparing tire options, series, or brand choices.
245/40R19 is a metric radial size in which 245 identifies the tire's nominal section width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 19 is the rim diameter in inches. On the 2026 Audi S5, this size supports a modern performance-oriented fitment with a little more sidewall than the 20-inch alternative. Available choices include BFGoodrich options in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series, all in blackwall form. This size is the one to evaluate when the car is equipped with 19-inch wheels and a balanced mix of handling response and everyday use matters.
Fit(s): Premium Plus, Premium Plus w/Black Optic Pkg., Prestige, and Prestige w/Black Optic Pkg.
Construction: Radial|Rim: 20 in
245/35R20 is also a metric radial size, with the same 245-millimeter nominal section width but a lower 35-series profile mounted on a 20-inch rim. For the 2026 Audi S5, it keeps the same basic width as the 19-inch fitment while pairing it with the larger wheel package used on certain trims and appearance packages. Product choices include BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and the Nitto NT555 G2, all as blackwall radials. This is the size to review when the car has 20-inch wheels and the exact wheel diameter needs to stay matched.
Tire fitment on the 2026 Audi S5 varies by sub-model and wheel package rather than following one size across the full lineup. Checking the exact trim matters because some versions use only one size, while others can use either the 19-inch or 20-inch fitment depending on how the car is equipped.
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2026 Audi S5 Premium
The 2026 Audi S5 Premium uses the 245/40R19 radial fitment. That keeps tire selection focused on choosing the right 19-inch product series for the car's intended use rather than sorting between multiple wheel diameters.
The 2026 Audi S5 Premium Plus can use either 245/40R19 or 245/35R20, so wheel confirmation comes first. Tire selection here depends on the actual wheel package on the car before comparing available radial series and brand options.
The 2026 Audi S5 Premium Plus w/Black Optic Pkg. uses the 245/35R20 radial size. That makes the main buying decision a 20-inch product choice, with attention to wheel compatibility and the lower-profile character of the tire.
The 2026 Audi S5 Prestige can be fitted with either 245/40R19 or 245/35R20 depending on the wheel setup. Matching the tire to the actual rim diameter is the key first step before narrowing the choice by tire series or brand.
The 2026 Audi S5 Prestige w/Black Optic Pkg. uses the 245/35R20 radial fitment. Buyers with this sub-model can concentrate on comparing 20-inch blackwall performance tires instead of sorting through multiple primary sizes.
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 2026 Audi S5 Tires for Sale
Available 2026 Audi S5 tires center on 245/40R19 and 245/35R20 radial blackwall fitments, with BFGoodrich covering both sizes across several g-Force series and Nitto adding another 20-inch option. The product grid is most useful for comparing series character, brand, and rim-width compatibility.
The most important 2026 Audi S5 tire questions usually come down to size by trim, 19-inch versus 20-inch wheel fitment, and how to compare the available radial tire choices. The answers below focus on fitment, selection, appearance, and road-use checks for this exact model.
Tire Size & Fitment
What tire size fits a 2026 Audi S5?
The 2026 Audi S5 uses two primary tire sizes: 245/40R19 and 245/35R20. Both are radial fitments, but they are not interchangeable as a simple size choice because each one is tied to a different rim diameter and, in some cases, a different sub-model or package.
The practical first step is confirming the exact trim and the wheel diameter currently on the car. Premium models use 245/40R19, Black Optic Package versions use 245/35R20, and Premium Plus or Prestige models can appear with either size, so the actual wheel package matters before selecting a tire.
What size rim does a 2026 Audi S5 use?
A 2026 Audi S5 uses either a 19-inch or 20-inch rim, depending on the tire size and sub-model configuration. The 245/40R19 fitment is built for a 19-inch rim, while the 245/35R20 fitment is built for a 20-inch rim.
That rim diameter difference is the key reason tire selection should start at the wheel, not just the sidewall width. If the car has aftermarket wheels or a previous owner changed the package, verify the actual rim size stamped on the wheel before choosing a replacement tire.
Do all 2026 Audi S5 sub-models use the same tire size?
No, 2026 Audi S5 sub-models do not all use the same tire size. Premium uses 245/40R19, Premium Plus and Prestige can use either 245/40R19 or 245/35R20, and the Black Optic Package versions use 245/35R20.
That means trim level alone is not always enough unless the package is clearly defined. On Premium Plus and Prestige models, it is worth checking the actual wheel diameter on the car so the replacement tire matches the installed setup rather than assuming every S5 in the lineup uses one universal size.
Choosing the Right Tire
What should I consider when choosing a tire for a 2026 Audi S5?
Start with the correct primary size for the car: 245/40R19 or 245/35R20. From there, compare radial tire series, brand, rim-width compatibility, and product details such as whether the tire leans toward a more performance-focused or all-season style within the available choices.
The best comparison point is how the car is actually used. A daily-driven S5 may call for a different series than one used mainly for fair-weather performance driving, but the tire still needs to match the wheel diameter and suit the car's existing wheel width before any other feature becomes meaningful.
What sidewall styles are available for 2026 Audi S5 tires?
The available 2026 Audi S5 tire options in these fitments use a blackwall sidewall style. That applies across the current 245/40R19 and 245/35R20 product choices, keeping the appearance clean and contemporary in a way that suits the S5's modern sport-luxury character.
Since sidewall treatment is not the differentiator here, the real comparison shifts to tire series, brand, and wheel-size match. Buyers usually end up choosing between 19-inch and 20-inch fitment first, then narrowing the selection by the driving character they want from the available blackwall radial options.
What brands offer tires for the 2026 Audi S5?
BFGoodrich and Nitto both offer tires for the 2026 Audi S5 in the sizes used here. BFGoodrich covers both 245/40R19 and 245/35R20 with several g-Force series, while Nitto appears in the 245/35R20 fitment with the NT555 G2.
Brand alone should not be the only filter, especially on a car with two possible wheel diameters. It makes more sense to confirm the exact size on the car first, then compare which series within that size best matches the intended use, wheel width, and overall feel you want from the S5.
Restoration & Appearance
Which tire should I choose for a period-style 2026 Audi S5?
A 2026 Audi S5 is a modern performance car, so period-style appearance is less about vintage sidewall treatment and more about preserving the wheel-and-tire proportions intended for the car's original design era. That usually means staying with the correct 245/40R19 or 245/35R20 fitment for the wheel package on the vehicle.
Appearance also depends on how closely the car remains to its stock presentation. A 19-inch setup and a 20-inch Black Optic-style setup create different visual results, so the most consistent approach is matching the tire size to the actual wheel package rather than treating all S5 trims as visually interchangeable.
Does correct tire fitment matter for a 2026 Audi S5 restoration or preservation project?
Yes, correct tire fitment matters on a 2026 Audi S5 even in a newer preservation-minded project. The right size maintains the intended relationship between the wheel, fender opening, and overall stance, while an incorrect profile or rim diameter can change the car's look before road behavior is even considered.
Owners trying to keep the car close to its original presentation should verify trim, package, and wheel diameter before replacing tires. That is especially important on Premium Plus and Prestige models, where either 19-inch or 20-inch fitment may appear depending on the specific wheel setup installed on the car.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2026 Audi S5?
Yes, modifications can affect tire fitment on a 2026 Audi S5. Changes such as aftermarket wheels, altered wheel widths, suspension lowering, spacer use, or body modifications can influence whether the original 245/40R19 or 245/35R20 size still has the same relationship to steering and fender clearance.
Even when the sidewall size looks correct, the wheel itself may change the real fitment picture. A smart check includes actual rim diameter, wheel width, and clearance at full steering lock and suspension movement so the tire choice matches the car as it sits now, not only how it left the factory.
What should I inspect before driving a 2026 Audi S5 on new tires?
Before driving a 2026 Audi S5 on new tires, inspect the wheel condition, confirm the tire size matches the installed rim diameter, and check for proper inflation, bead seating, and valve condition. It also helps to look over the suspension and alignment condition so the new tires are not starting with an avoidable problem.
A short road check should confirm there is no rubbing, vibration, or irregular steering feel. After the first miles, recheck pressure and visually inspect the sidewalls and tread to make sure the tires are wearing evenly and clearing the inner wheelhouse and fender edges as expected.
What should I check before a longer drive in a 2026 Audi S5?
Before a longer drive in a 2026 Audi S5, check tire pressure, tread condition, and the sidewalls for cuts, bulges, or impact damage. It is also worth confirming that all four tires match the intended size and that the car is not carrying an unnoticed wheel or alignment issue.
Longer trips put more heat and distance into the tire, so small problems become easier to feel and harder to ignore. A quick walkaround, pressure check, and inspection for uneven wear can catch issues early, especially on low-profile fitments where wheel damage or clearance problems may show up more quickly.
