2020 Audi S5 Tires

The 2020 Audi S5 uses three primary radial tire sizes: 245/40R18, 255/35R19, and 265/30R20. The correct size depends on the specific sub-model and, just as important, the wheel diameter on the car. Premium coupe and cabriolet versions use 18-inch or 19-inch fitments, while Premium Plus and Prestige versions may also use the 20-inch setup.

The practical step is to verify the wheel size actually installed before choosing a tire. Many S5s remain on their original wheel package, but some cars receive replacement or upgraded wheels, and that changes the correct tire size. Matching the tire to the exact rim diameter should come before comparing brands, sidewall style, or performance series.

A 2020 Audi S5 may use 18-inch, 19-inch, or 20-inch rims, depending on the sub-model and wheel package. The 245/40R18 size uses an 18-inch rim, 255/35R19 uses a 19-inch rim, and 265/30R20 uses a 20-inch rim. Those rim diameters are tied directly to the tire size rather than being interchangeable across the board.

Wheel diameter should be confirmed before treating any tire as correct for the car. A 19-inch tire cannot be mounted on an 18-inch or 20-inch wheel, and the same logic applies across all three S5 fitments. Once rim diameter is settled, it becomes much easier to compare the available radial tire options within the proper size.

No, 2020 Audi S5 sub-models do not all use the same tire size. Premium Coupe and Premium Cabriolet models use either 245/40R18 or 255/35R19, while Premium Plus and Prestige coupe and cabriolet models may use 245/40R18, 255/35R19, or 265/30R20. The trim level and wheel package together determine the correct fitment.

That variation matters because the first buying decision is not brand or tread style, but confirming the exact combination of sub-model and wheel diameter. Looking only at the model name can lead to the wrong size, especially on used cars. Checking the existing wheel setup helps narrow the fitment quickly and keeps the search focused on tires that actually match the car.

For a 2020 Audi S5 using 245/40R18, the starting point is staying with the correct radial size and confirming the wheel matches the 18-inch setup. From there, the main differences are product character and appearance. Choices in this size include blackwall performance tires from BFGoodrich, Nitto, and M&H Racemaster, plus Pro-Trac Street Pro III options with redline or raised white letter sidewalls.

That means the decision can be tailored to how the car is driven and how the owner wants it to look. A street-driven S5 may call for one style of radial, while a more specialized use may point elsewhere. Rim-width compatibility, load figures where stated, and sidewall presentation are all worth comparing before settling on a specific 245/40R18 tire.

Sidewall style depends on the tire size chosen for the 2020 Audi S5. In 245/40R18, available options include blackwall, redline, and RWL, which is raised white letter. In 255/35R19, the available products are blackwall performance radials. That gives 18-inch buyers more visual variety, while 19-inch buyers are centered on a cleaner modern performance presentation.

Appearance should be matched to the car’s personality and the owner’s goal rather than treated as a simple cosmetic extra. A blackwall keeps the look understated, while redline or raised white letters create a more distinctive presentation. The important thing is choosing the sidewall style only after confirming the correct tire size and wheel diameter for the specific S5.

Tires for the 2020 Audi S5 are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand spread depends on size. The 245/40R18 fitment has the broadest variety, while 255/35R19 centers on BFGoodrich offerings. Each brand appears within a radial format, but the tire series and intended use differ enough that brand alone should not be the only deciding factor.

A smart comparison looks at the complete package: correct size, wheel compatibility, sidewall style, and the character of the tire series itself. Some buyers will focus on a traditional blackwall performance look, while others may want a more distinctive redline or raised white letter appearance. Narrowing the search by exact fitment first makes brand comparison much more useful.

A period-style approach on a 2020 Audi S5 usually starts with keeping the correct wheel diameter and tire size already associated with the car, then choosing a sidewall treatment that supports the look you want. In 245/40R18, blackwall, redline, and raised white letter options are available. In 255/35R19, the selection shown is focused on blackwall performance radials.

Because this is a modern performance car, appearance choices tend to be more subtle than on older collector vehicles. Owners aiming for a clean, understated presentation will likely stay with blackwalls, while 18-inch fitments allow a more customized visual statement. The best result comes from balancing the S5’s modern design language with the correct size and wheel setup.

On the 2020 Audi S5, the primary fitments are radial tires, so construction does not create a bias-ply-versus-radial appearance decision. The visual difference instead comes more from sidewall treatment and tire series. In the available 18-inch fitment, blackwall, redline, and raised white letter options can change the car’s presentation far more noticeably than construction itself.

That makes appearance selection more about style than historical tire architecture. Buyers trying to keep the car close to its modern performance character will usually focus on blackwall radials, while those building a more individualized look may prefer the 18-inch redline or raised white letter choices. Correct fitment still matters most, since the right look starts with the right size.

Yes, modifications can affect tire fitment on a 2020 Audi S5. Aftermarket wheels, suspension changes, lowering, alignment changes, or body alterations can all influence whether a tire size that belongs on a stock wheel package still works cleanly on the car. That matters especially on an S5, where 18-inch, 19-inch, and 20-inch fitments already exist across the model range.

A modified car should be checked for actual wheel diameter, wheel width, and available clearance before any new tire is chosen. Steering lock, fender space, and suspension travel all deserve attention when the setup differs from stock. Confirming the current configuration is far more reliable than assuming the trim name alone still tells the whole fitment story.

Before driving a 2020 Audi S5 on new tires, inspect the wheels for damage, confirm the tire size matches the rim diameter, and make sure the tires are seated and inflated properly. A quick check for rubbing at full steering lock is also worthwhile, especially if the car has non-original wheels or suspension changes. Basic brake and suspension condition should not be overlooked either.

A short, careful road test helps confirm that the car tracks properly and that there is no vibration, air loss, or contact under normal driving. Rechecking inflation after the initial drive is a sensible habit. Tire replacement is also a good time to look over tread wear patterns on the old set, since uneven wear can point to alignment or suspension issues.

Before a longer drive in a 2020 Audi S5, check tire pressure, tread condition, and the sidewalls for cuts, bulges, or cracking. Make sure all four tires are the correct size for the wheel package on the car and that there are no signs of unusual wear. Even relatively new tires deserve a close look if the vehicle has been sitting for extended periods.

Longer trips also put more emphasis on wheel condition, alignment stability, and consistent air retention. A final walkaround after the first few miles can reveal anything that was easy to miss at home. On an S5 with replacement wheels or recent tire changes, extra attention to clearance and vibration is worthwhile before settling into highway use.