The 2015 Audi S5 sits in the modern grand-touring side of Audi performance, blending sharp coupe and cabriolet styling with the everyday usability that makes these cars appealing long after their showroom years. It is a vehicle where stance, wheel choice, and tire profile all play a visible role in both appearance and road feel. The 2015 Audi S5 uses radial tire fitments in 245/40R18, 255/35R19, and on certain coupes, 265/30R20. Available choices range from blackwall performance radials to redline and raised white letter options in 245/40R18. The key is matching the exact sub-model and wheel diameter before narrowing the look and tire series that best suit the car.
Which Tire Size Is Right for The 2015 Audi S5
Three tire sizes apply to the 2015 Audi S5, and the right one depends first on the exact sub-model and wheel diameter. All of these are radial fitments, but the car uses 18-inch, 19-inch, and in some coupe applications 20-inch wheels, so confirming the wheel setup on the vehicle is the first step before comparing tire series, sidewall style, or performance-oriented product choices.
Fit(s): Premium Plus Cabriolet, Premium Plus Coupe, Prestige Cabriolet, and Prestige Coupe
Construction: Radial|Rim: 18 in
245/40R18 is a metric radial size in which 245 identifies the nominal section width in millimeters, 40 is the aspect ratio, R denotes radial construction, and 18 is the rim diameter in inches. On the 2015 Audi S5, this size serves buyers using the 18-inch wheel fitment and keeps the selection firmly in modern radial territory. Available choices include blackwall designs from M&H Racemaster, BFGoodrich, and Nitto, along with redline and RWL offerings from Pro-Trac across several tire series. This size is worth considering when the car is equipped with 18-inch wheels and the owner wants the broadest mix of performance and appearance options.
Fit(s): Premium Plus Cabriolet, Premium Plus Coupe, Prestige Cabriolet, and Prestige Coupe
Construction: Radial|Rim: 19 in
255/35R19 is a metric radial size with a 255-millimeter nominal section width, a 35-series profile, radial construction, and a 19-inch rim diameter. For the 2015 Audi S5, it applies to cars running the 19-inch wheel setup and represents a lower-profile fitment than the 18-inch option while remaining within the vehicle's primary radial fitment range. Product choices in this size center on BFGoodrich performance-oriented blackwall offerings across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. It is the right size to evaluate when the car already has 19-inch wheels and the goal is to stay with that wheel diameter.
265/30R20 is a metric radial size where 265 is the nominal section width in millimeters, 30 is the aspect ratio, R signifies radial construction, and 20 indicates the wheel diameter. On the 2015 Audi S5, this size appears only on certain coupe configurations, making it a fitment that requires especially careful wheel confirmation before tire selection begins. Its profile places it in the larger-wheel end of this S5 range, so buyers should think in terms of maintaining the car's existing 20-inch setup rather than treating it as interchangeable with the 18-inch or 19-inch options. This size should be evaluated by owners whose coupe is already equipped for 20-inch tires.
Sub-model fitment matters on the 2015 Audi S5 because cabriolet and coupe versions do not share exactly the same size range. Every covered S5 uses radial tires, but the coupe can extend to a 20-inch fitment that does not appear on the cabriolet, so the exact body configuration and wheel diameter should be confirmed first.
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2015 Audi S5 Premium Plus Cabriolet
The 2015 Audi S5 Premium Plus Cabriolet uses the 245/40R18 and 255/35R19 radial fitments rather than the 20-inch size seen on certain coupes. Tire selection here starts with confirming whether the car is on 18-inch or 19-inch wheels, then narrowing the choice by sidewall style, brand, and tire series.
The 2015 Audi S5 Premium Plus Coupe has the widest fitment spread of the covered range, using 245/40R18, 255/35R19, or 265/30R20 radial tires depending on wheel setup. That makes wheel diameter the key first check before comparing available products or deciding whether to preserve the car's current stance and profile.
The 2015 Audi S5 Prestige Cabriolet shares the same two primary radial sizes as the Premium Plus Cabriolet: 245/40R18 and 255/35R19. The practical decision is less about multiple construction types and more about confirming the installed wheel diameter before choosing among blackwall performance tires or, in 18-inch fitment, more appearance-driven sidewall treatments.
The 2015 Audi S5 Prestige Coupe uses the same three-size radial range as the Premium Plus Coupe, including the available 20-inch fitment. Buyers should verify whether the car is on 18-, 19-, or 20-inch wheels first, since that determines the correct size family before any comparison of brands or tire series begins.
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 2015 Audi S5 Tires for Sale
Available 2015 Audi S5 tire choices center on radial performance tires in 245/40R18 and 255/35R19. Buyers can compare BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac options by tire series and sidewall treatment, with blackwall offerings joined by redline and raised white letter styles in 245/40R18.
The most useful 2015 Audi S5 tire questions usually come down to exact size by sub-model, wheel diameter, available radial choices, sidewall style, and what to inspect before putting a modern performance-oriented S5 back on the road.
Tire Size & Fitment
What tire size fits a 2015 Audi S5?
The 2015 Audi S5 uses three primary tire sizes: 245/40R18, 255/35R19, and 265/30R20. All are radial fitments, but they do not apply the same way across the range. Cabriolet models use 245/40R18 or 255/35R19, while coupe models can use those sizes and may also use 265/30R20.
The practical first step is identifying whether the car is a coupe or cabriolet and then confirming the actual wheel diameter on the vehicle. Many S5s may have had wheel changes over time, so the right tire choice depends on the wheels currently installed rather than assuming every 2015 S5 uses the same size.
What size rim does a 2015 Audi S5 use?
A 2015 Audi S5 can use 18-inch, 19-inch, or 20-inch rims depending on the exact sub-model and wheel setup. The 245/40R18 tire fits an 18-inch rim, 255/35R19 fits a 19-inch rim, and 265/30R20 fits a 20-inch rim. All three are radial applications for this model range.
Wheel diameter should be confirmed before any tire shopping begins, since the S5 does not stay within a single rim size across all covered configurations. Checking the wheel itself is especially important on cars with aftermarket wheels, seasonal wheel sets, or prior owner modifications that may have changed the original setup.
Do all 2015 Audi S5 sub-models use the same tire size?
No. The 2015 Audi S5 cabriolet models use 245/40R18 and 255/35R19, while the coupe models use those same sizes and can also use 265/30R20. That means fitment varies by sub-model and wheel package rather than staying uniform across the full S5 lineup.
This difference matters because tire selection starts with the exact body style and wheel diameter, not simply the model name. A buyer looking at a coupe should verify whether the car is on 18-, 19-, or 20-inch wheels, while a cabriolet owner can narrow the search to the 18-inch and 19-inch fitments.
Choosing the Right Tire
What should I consider when choosing a 2015 Audi S5 tire?
Start with the correct size for the car's actual wheel diameter: 245/40R18, 255/35R19, or on certain coupes, 265/30R20. From there, compare construction, series, and intended use. The available products for the S5 stay in radial construction, but they vary from street performance lines to a drag race-oriented option in 245/40R18.
Appearance can matter almost as much as specification on a well-kept S5, especially if the car has a particular wheel and stance theme. It also helps to compare rim-width compatibility, load figures where stated, and how the tire's profile suits the car's present setup instead of choosing only by size code.
What sidewall styles are available for 2015 Audi S5 tires?
Blackwall is the main sidewall style available for the 2015 Audi S5, especially in the 255/35R19 fitment. In 245/40R18, the selection expands to include redline and RWL, which is a raised white letter presentation. Those options create a noticeably different visual effect even when the tire size remains the same.
A blackwall tire keeps the look modern and understated, while redline and raised white letter styles push the appearance in a more customized direction. Matching the sidewall treatment to the car's wheels, paint, and overall build theme is worthwhile, particularly on an S5 that has been personalized beyond stock trim.
What brands offer tires for the 2015 Audi S5?
Available brands for the 2015 Audi S5 include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand coverage depends on tire size. The 245/40R18 fitment has the broadest spread, while 255/35R19 centers on BFGoodrich performance-oriented choices. Each brand approaches the S5's fitment with a different series emphasis and style range.
Brand is best used as one comparison point rather than the first decision. After confirming the correct size, look at the series offered, sidewall treatment, rim-width specification, and whether the tire's intended role matches the way the car is actually driven, displayed, or set up.
Restoration & Appearance
Which tire should I choose for a period-style 2015 Audi S5?
A period-style 2015 Audi S5 usually starts with keeping the correct wheel diameter and tire profile already suited to the car, rather than changing to a dramatically different setup. That means choosing among 245/40R18, 255/35R19, or on certain coupes 265/30R20, then selecting a radial that matches the car's intended presentation.
For a more understated look, blackwall options keep the appearance close to the modern grand-touring character the S5 carried when new. A buyer pursuing a more customized visual theme may gravitate toward the 245/40R18 fitment, where redline and raised white letter sidewall treatments introduce a stronger styling statement.
How does tire construction affect the appearance of a restored 2015 Audi S5?
Construction changes are less of an appearance issue on the 2015 Audi S5 than on an older collector car, because this model uses radial tires across its primary fitments. The visible differences come more from sidewall style, overall profile, and wheel diameter than from choosing between bias-ply and radial construction.
That said, the tire still shapes how the car sits and how authentic its era-appropriate presentation feels. Keeping the correct size family for the installed wheels helps preserve the S5's intended visual balance, while dramatic size or wheel changes can quickly alter the look from refined sport coupe or cabriolet to heavily modified.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 Audi S5?
Yes. Wheel changes, suspension lowering, spacer use, and other modifications can all affect tire fitment on a 2015 Audi S5. That matters even when the tire size seems familiar, because this model already spans 18-inch, 19-inch, and 20-inch fitments across its covered configurations and does not rely on one universal setup.
Checking the actual wheel diameter, wheel width, and available clearance at the fender and suspension is the smart next step on any modified S5. A car with aftermarket wheels or altered ride height should be evaluated as it sits now, not only by the original year-make-model application.
What should I inspect before driving a 2015 Audi S5 on new tires?
Before driving a 2015 Audi S5 on new tires, inspect the wheels for damage, confirm that the installed tire size matches the wheel diameter, and make sure the tires are properly inflated. It is also wise to check for any rubbing points at the inner wheelhouse, suspension, and outer fender area once the tires are mounted.
A short initial road test should include attention to vibration, pull, unusual noise, and steering feel. The S5's low-profile radial fitments make wheel condition and alignment especially worth reviewing, since bent wheels, worn suspension parts, or poor alignment settings can show up quickly after a fresh set of tires is installed.
How often should tires on a 2015 Audi S5 be inspected?
Tires on a 2015 Audi S5 should be inspected regularly, not only by mileage but also by time and use pattern. Look for uneven wear, cuts, cracking, bulges, punctures, and recurring air loss. Performance-oriented radial tires on a car like the S5 deserve close attention because profile and condition both affect how the car feels on the road.
Monthly pressure checks are a sensible habit, and any S5 that is driven less often should still have its tires examined before longer trips. Cars that spend time parked can develop age-related issues even with acceptable tread, so condition, storage environment, and tire age matter just as much as visible wear.
