The 2013 Audi S5 sits in the modern grand-touring performance category, blending Audi coupe and Cabriolet style with the sharper road manners buyers expect from an S-car. It is a vehicle where wheel and tire choice strongly shapes both stance and response. For this model, fitment centers on three radial sizes: 245/40R18, 255/35R19, and 265/30R20, depending on the wheel setup and sub-model. Available choices include blackwall performance radials, plus redline and raised white letter options in 245/40R18. The real task is confirming the exact wheel diameter and configuration first, then choosing the tire style and series that suit the car's appearance and intended use.
Which Tire Size Is Right for The 2013 Audi S5
The 2013 Audi S5 uses three primary tire sizes, and the correct choice depends first on wheel diameter and then on sub-model. Both the Base and Cabriolet use radial tires, but the Base can run 18-, 19-, or 20-inch fitments while the Cabriolet uses 18- or 19-inch sizes. Before selecting a tire, confirm the actual wheel size currently on the car, especially if it has been changed from stock-style dimensions.
245/40R18 is a metric radial size in which 245 identifies the nominal section width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 18 is the wheel diameter in inches. On the 2013 Audi S5, this size is one of the standard lower-diameter fitments and appears on both the Base and Cabriolet. Product choice is broad here, with blackwall performance tires from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, plus redline and RWL sidewall treatments in the Street Pro III series. It is the most varied size on this vehicle for buyers balancing appearance, street use, and specialized tire character.
255/35R19 is a metric radial size that uses a 255-millimeter nominal section width, a 35-series profile, and a 19-inch wheel diameter. For the 2013 Audi S5, it serves as a larger-wheel fitment used on both the Base and Cabriolet, keeping the vehicle in a modern low-profile radial format. Available choices in this size center on BFGoodrich performance-oriented series such as g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, all in blackwall form. This size makes the most sense when the car is already equipped with 19-inch wheels and the goal is to stay with a clearly performance-focused tire selection.
265/30R20 is a metric radial size with a 265-millimeter nominal section width, a very short 30-series profile, and a 20-inch rim diameter. On the 2013 Audi S5, this size belongs to the Base configuration rather than the Cabriolet, so it should not be assumed across every S5 sub-model. Its sizing points to a larger-diameter wheel setup with a lower-profile tire presentation than the 18- and 19-inch options. This is the size to evaluate only after confirming that the car is actually running 20-inch wheels and that the current setup has the necessary clearance and wheel compatibility.
Sub-model fitment matters on the 2013 Audi S5 because the Base and Cabriolet do not share every wheel and tire combination. The Base spans three radial sizes, while the Cabriolet uses two, so identifying the exact sub-model helps narrow the correct wheel diameter before choosing a tire.
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2013 Audi S5 Base
The 2013 Audi S5 Base has the widest fitment range, covering 18-, 19-, and 20-inch radial tire setups. That makes wheel confirmation especially important, and it also opens the door to more variation in tire appearance and series depending on whether the goal is a straightforward blackwall performance look or something more distinctive.
The 2013 Audi S5 Cabriolet uses the 18-inch and 19-inch radial fitments rather than the 20-inch size. Tire selection starts with confirming which wheel diameter is on the car now, then choosing among the available performance-focused options that suit the Cabriolet's road use and preferred appearance.
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 2013 Audi S5 Tires for Sale
Available 2013 Audi S5 tires center on radial performance options from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Buyers can compare blackwall selections across several series, with redline and raised white letter styling also available in 245/40R18.
These 2013 Audi S5 tire FAQs focus on the exact fitment questions that matter most: choosing among 18-, 19-, and 20-inch sizes, understanding sub-model differences, comparing available tire series and sidewall styles, and checking the car before road use.
Tire Size & Fitment
What tire size fits a 2013 Audi S5?
The 2013 Audi S5 uses three radial tire sizes: 245/40R18, 255/35R19, and 265/30R20. The Base model can use all three sizes, while the Cabriolet uses 245/40R18 and 255/35R19.
The most important step is confirming the wheel diameter actually on the car before choosing a tire. Many S5s may no longer wear their original-style wheel setup, so checking the current wheel and matching it to the correct tire size is more useful than assuming every 2013 S5 uses the same fitment.
What size rim does a 2013 Audi S5 use?
A 2013 Audi S5 can use 18-inch, 19-inch, or 20-inch rims, depending on the tire size and configuration. The matching tire sizes are 245/40R18 for 18-inch rims, 255/35R19 for 19-inch rims, and 265/30R20 for 20-inch rims.
Wheel diameter needs to be verified before anything else because the S5 does not rely on a single rim size across all setups. It also helps to confirm wheel width and overall clearance, particularly if the car has aftermarket wheels, because a correct diameter alone does not automatically settle the full fitment question.
Do all 2013 Audi S5 sub-models use the same tire size?
No. The 2013 Audi S5 Base uses 245/40R18, 255/35R19, or 265/30R20, while the 2013 Audi S5 Cabriolet uses 245/40R18 or 255/35R19. The 20-inch 265/30R20 size applies to the Base rather than the Cabriolet.
That difference matters because buyers should identify the exact sub-model before narrowing tire choices. Once the sub-model is confirmed, the next step is to verify the wheel diameter currently on the vehicle, since a Base model may still be running 18- or 19-inch wheels instead of the larger 20-inch setup.
Choosing the Right Tire
What should I consider when choosing a 245/40R18 tire for a 2013 Audi S5?
Start with the fact that 245/40R18 is a radial fitment used on both the 2013 Audi S5 Base and Cabriolet. In this size, selection varies more than in the other S5 fitments, with options that include blackwall performance tires plus redline and raised white letter sidewall styles.
The best way to narrow the choice is to match the tire to the car's use and presentation. A buyer focused on a clean modern look may stay with blackwall tires, while a more customized visual style may point toward redline or RWL offerings, and wheel width should still be checked against the tire's compatibility range.
What sidewall styles are available for 2013 Audi S5 tires?
Sidewall style depends on tire size. For the 2013 Audi S5, blackwall is the main sidewall treatment across the available products, and 245/40R18 also offers redline and RWL, or raised white letter, options through the Pro-Trac Street Pro III line.
That means appearance choices are widest in the 18-inch size, while the 19-inch selection stays more traditional and performance-oriented in blackwall form. Sidewall style should be chosen after the correct size and wheel diameter are confirmed, since a preferred visual treatment is only useful if it is available in the fitment the car actually uses.
What brands offer tires for the 2013 Audi S5?
Available 2013 Audi S5 tire brands include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand variety is strongest in 245/40R18, while 255/35R19 centers on BFGoodrich performance series.
Brand alone should not be the only deciding factor. It helps to compare each tire by size, construction, sidewall treatment, tire series, and wheel compatibility, since the right choice depends on whether the goal is everyday street use, a more aggressive performance presentation, or a specialized application such as drag-oriented radial use.
Restoration & Appearance
Which tire should I choose for a period-style 2013 Audi S5?
A period-style 2013 Audi S5 usually starts with staying in the correct modern low-profile radial size for the wheel diameter already on the car. That means choosing among 245/40R18, 255/35R19, or 265/30R20 rather than moving into an unrelated vintage-style fitment.
Appearance then comes down to how close the owner wants to stay to a contemporary factory-era look versus a more personalized presentation. Blackwall tires usually keep the cleanest modern performance character, while the 245/40R18 offerings add redline and raised white letter choices for a more customized look that changes the car's visual tone.
How does tire construction affect the appearance of a restored 2013 Audi S5?
On the 2013 Audi S5, the primary fitments are all radial, so the appearance question is less about changing construction type and more about keeping the proper modern low-profile shape for the wheel size. The overall look is defined by section width, sidewall height, and sidewall treatment.
Keeping the car in the correct radial sizing family preserves the visual balance Audi performance models are known for. A blackwall tire gives the most restrained presentation, while redline or raised white letter styling in 245/40R18 creates a much more assertive look, so the choice should match the car's build direction rather than fight it.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 Audi S5?
Yes. A 2013 Audi S5 may no longer be on its original-style wheel and suspension setup, and changes such as aftermarket wheels, altered offsets, lowering, or suspension work can affect which tire size has adequate clearance. That matters even when the tire matches one of the correct S5 size families.
A modified car should be checked at full steering lock and through suspension movement before finalizing a tire choice. Wheel diameter is only the first part of the fitment picture, so it is wise to confirm width, inner and outer clearance, and how the tire sits within the fender opening on the actual vehicle.
What should I inspect before driving a 2013 Audi S5 on new tires?
Before driving a 2013 Audi S5 on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and make sure each tire is in sound condition with no visible cuts, bulges, or mounting damage. Tire pressure should also be set correctly before road use.
It also helps to check alignment, suspension condition, and clearance around the fenders and steering components, especially on a low-profile fitment such as 255/35R19 or 265/30R20. A short test drive followed by a second inspection can catch rubbing, vibration, or air loss before the car is used more seriously.
How often should tires on a 2013 Audi S5 be inspected?
Tires on a 2013 Audi S5 should be inspected regularly, not just when tread appears worn. A quick visual check before routine driving and a closer inspection at set intervals helps catch uneven wear, sidewall damage, punctures, and pressure loss before they become larger problems.
Low-profile performance tires deserve especially close attention because wheel damage, alignment issues, and edge wear can show up faster than many owners expect. Cars that sit for long periods should also be checked for age-related cracking and flat spotting, since a collector or seasonal-use pattern can stress tires differently than daily driving.
