2020 Audi S5 Sportback Tires

The 2020 Audi S5 Sportback uses three primary radial tire sizes: 245/40R18, 255/35R19, and 265/30R20. The correct size depends on the sub-model and the wheel package installed on the car, so there is not one universal fitment across every S5 Sportback configuration.

The most important next step is checking the actual wheel diameter on the vehicle before choosing a tire. Premium models use 18-inch or 19-inch fitments, while Premium Plus and Prestige can also use a 20-inch setup, so the tire must match the wheel already on the car unless the entire wheel-and-tire package is being changed.

A 2020 Audi S5 Sportback can use 18-inch, 19-inch, or 20-inch rims, depending on trim and wheel configuration. Those rim diameters correspond to the vehicle’s primary tire sizes of 245/40R18, 255/35R19, and 265/30R20.

Rim diameter should be confirmed before anything else because the tire size must match the wheel exactly. Once the diameter is verified, it becomes much easier to narrow the choice by tire series, sidewall style, and intended driving use instead of risking a mismatch between tire and wheel.

No, the 2020 Audi S5 Sportback sub-models do not all use the same tire size. Premium uses 245/40R18 or 255/35R19, while Premium Plus and Prestige can use those sizes as well as 265/30R20.

That overlap can make ordering by model name alone misleading, especially if the car’s wheels have been changed or the owner is unsure which package it carries. Checking both the trim and the installed wheel diameter keeps the selection process on track and helps separate the real fitment question from brand or styling preference.

Start by confirming that the car actually uses the 18-inch wheel package, since 245/40R18 is only correct for that setup. From there, selection comes down to the tire’s intended use, brand, sidewall treatment, and rim-width compatibility, with options that range from blackwall performance radials to redline, RWL, and a drag-oriented radial.

An owner focused on street driving may compare the BFGoodrich, Nitto, and Pro-Trac offerings differently than someone considering an M&H Racemaster drag application. Matching the tire to the car’s real use matters just as much as matching the size, especially on a performance Audi where appearance and driving purpose often influence the final choice.

Sidewall choice is most varied in 245/40R18, where blackwall, redline, and RWL options are available. The 255/35R19 choices shown here center on blackwall performance tires, so sidewall appearance becomes a bigger decision for owners using the 18-inch fitment.

That distinction matters because sidewall treatment changes the visual character of the car even when the tire size stays the same. A blackwall keeps a modern performance look, while redline or raised white letter styling introduces a more custom presentation, so it helps to decide whether the goal is subtle factory-era modernity or something more expressive.

Tires for the 2020 Audi S5 Sportback are available here from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, depending on the size. The 18-inch fitment has the broadest brand spread, while the 19-inch fitment shown here focuses on BFGoodrich performance tire lines.

Brand choice should be weighed alongside the specific tire series, sidewall style, and intended use instead of as a standalone decision. On this car, some products lean toward general street performance, some toward visual customization, and one 18-inch option is clearly aimed at drag racing, so comparing purpose is just as important as comparing names.

A period-style approach on a 2020 Audi S5 Sportback still begins with the correct modern radial size for the car’s wheel package. Among the available choices, blackwall tires preserve the most contemporary OEM-era appearance, while 245/40R18 also opens the door to redline or RWL styling for owners pursuing a more customized visual statement.

Because this is a late-model performance Audi rather than a restoration-era classic, appearance usually centers more on subtlety than strict historical detailing. The best approach is to confirm the right size first, then decide whether the goal is a clean modern presentation or a deliberate departure through sidewall treatment.

Tire construction is straightforward on the 2020 Audi S5 Sportback because the primary fitments here are radial across all listed sizes. That means appearance differences come less from bias-ply versus radial construction and more from sidewall style, tread character, and the visual impact of the wheel diameter paired with the chosen size.

For an owner refreshing the car’s look, the practical choice is usually between a clean blackwall performance presentation and a more noticeable redline or raised white letter treatment in 245/40R18. Keeping the tire size matched to the wheel package preserves the car’s proportions better than chasing appearance alone.

Yes, modifications can affect tire fitment on a 2020 Audi S5 Sportback even when the tire size itself is one of the correct primary options. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering, and body clearance differences can all influence how a tire sits and whether it has enough room in motion.

A car that has been changed from its original wheel package should be checked carefully before a replacement tire is chosen. Verifying wheel diameter first, then confirming width and clearance at the fender, suspension, and steering range, helps prevent a correct-on-paper size from becoming a problem on a modified setup.

Before road use, inspect the 2020 Audi S5 Sportback’s wheel diameter, wheel condition, tire pressure, and the basic condition of the suspension and alignment-related wear points. The new tires should also be checked for proper seating, visible sidewall damage, air loss, and enough clearance through the full steering range where applicable.

A quick visual check is especially important if the car has changed hands, has been stored, or wears wheels different from its original package. Looking for rubbing marks, uneven old-tire wear, cracked valve stems, or signs of impact damage gives useful clues before the car is driven at speed.

Before a longer drive, make sure the 2020 Audi S5 Sportback is on the correct tire size for its actual wheel diameter and that all four tires are in sound condition. Pressure, tread condition, sidewall integrity, and any signs of air loss or impact damage deserve attention before the trip starts.

Longer highway use puts more emphasis on consistency across the set, so it helps to catch uneven wear, vibration sources, or wheel damage early. A final walkaround to confirm there is no rubbing, no bulges, and no obvious mismatch between tire and wheel package can prevent avoidable trouble once the drive is underway.