The 2013 Audi A4 sits in the modern sport-sedan space where balanced handling, everyday road manners, and a clean executive look all matter. Buyers usually know the A4 as a car that blends German touring character with sharp, controlled response, so tire choice has a direct effect on how the car feels and looks. This model uses radial tire fitments in four sizes: 225/50R17, 245/45R17, 245/40R18, and 255/35R19. Available choices range from blackwall performance-oriented tires to redline and RWL offerings in select sizes. The key is matching the exact wheel setup first, then choosing the tread and sidewall style that suits your intended use.
Which Tire Size Is Right for The 2013 Audi A4
The 2013 Audi A4 uses four primary tire sizes, and the right one depends on the exact wheel option or sub-model configuration. Two sizes fit 17-inch wheels, while the others fit 18-inch or 19-inch wheels, so confirming the actual rim diameter on the car comes first. Once that is settled, the decision shifts to choosing the right radial tire within that size, including brand, tire series, and sidewall presentation where available.
A 245/40R18 tire is a metric radial size with a 245-millimeter section width, a 40-series aspect ratio, and fitment for an 18-inch wheel. On the 2013 Audi A4, this size supports a lower-profile look and keeps the selection focused on modern radial construction. Available choices include M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac, with blackwall, redline, and RWL sidewall treatments depending on the product. This is the size to evaluate when the car is equipped with the 18 Inch Option and you want to compare performance-oriented designs against more appearance-driven sidewall choices.
A 255/35R19 tire uses a 255-millimeter nominal width, a 35-series profile, and a 19-inch rim diameter in radial construction. For the 2013 Audi A4, this size belongs to the 19 Inch Option and represents the largest wheel diameter used among the listed fitments. Product choice centers on BFGoodrich tire 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 is the one to confirm carefully when replacing tires on an A4 with 19-inch wheels, since wheel diameter and width need to stay aligned with the tire's intended range.
A 225/50R17 tire is a metric radial with a 225-millimeter section width, a 50-series profile, and fitment for a 17-inch rim. On the 2013 Audi A4, this size appears on the Base configuration and gives buyers a straightforward modern radial option on the smaller of the listed wheel diameters. BFGoodrich and Nitto offer this size in blackwall form across g-Force Comp 2 AS, g-Force Sport Comp 2, and NT555 G2 series. This is the size to check when the car retains a 17-inch wheel setup and the goal is choosing among street-oriented radial options rather than cosmetic sidewall variations.
A 245/45R17 tire combines a 245-millimeter width with a 45-series aspect ratio and a 17-inch wheel diameter in radial construction. For the 2013 Audi A4 Base, it is the wider of the two 17-inch fitments and opens up a broader mix of product types. Available options include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, with blackwall, redline, and RWL sidewall styles depending on the tire series. This size deserves close attention if your A4 is on 17-inch wheels, because the same rim diameter can still use more than one tire width and profile combination.
Sub-model fitment on the 2013 Audi A4 varies by wheel option rather than staying uniform across the lineup. Checking whether the car is a Base configuration or carries the 18 Inch Option or 19 Inch Option is the quickest way to narrow the correct tire size.
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2013 Audi A4 (18 Inch Option)
The 2013 Audi A4 (18 Inch Option) uses an 18-inch radial fitment centered around the 245/40R18 size. Tire selection here is mainly about choosing among available brands, tread families, and sidewall styles while keeping the 18-inch wheel setup consistent.
The 2013 Audi A4 (19 Inch Option) uses a 19-inch radial tire setup built around 255/35R19. That makes wheel confirmation especially important, since this fitment differs from the 17-inch and 18-inch A4 configurations and should be matched to the car's actual wheel diameter and width.
The 2013 Audi A4 Base uses two 17-inch radial tire sizes, so this sub-model still requires a closer look before replacement. Owners should confirm which 17-inch wheel and tire combination is on the car now, then compare available blackwall, redline, or RWL choices where that size allows them.
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 A4 Tires for Sale
Available 2013 Audi A4 tires span BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster, depending on size. Buyers can compare blackwall options across several performance-oriented series, with redline and RWL sidewall treatments offered in select 17-inch and 18-inch fitments.
These 2013 Audi A4 tire FAQs focus on the exact size question first, then move into wheel diameter, sub-model differences, product choices, appearance options, and the fitment checks that matter before the car goes back on the road.
Tire Size & Fitment
What tire size fits a 2013 Audi A4?
The 2013 Audi A4 uses four tire sizes: 225/50R17, 245/45R17, 245/40R18, and 255/35R19. All are radial fitments, and the correct one depends on the exact wheel option or sub-model configuration rather than the model name alone.
The first thing to verify is the wheel diameter already on the car, since the A4 uses 17-inch, 18-inch, and 19-inch setups. After that, compare the exact tire size on the sidewall or wheel sticker to avoid mixing a 17-inch fitment with an 18-inch or 19-inch package.
What size rim does a 2013 Audi A4 use?
A 2013 Audi A4 can use 17-inch, 18-inch, or 19-inch rims, depending on the configuration. The 225/50R17 and 245/45R17 sizes fit 17-inch wheels, 245/40R18 fits an 18-inch wheel, and 255/35R19 fits a 19-inch wheel.
Rim diameter is the non-negotiable starting point because a tire must match the wheel's bead seat diameter exactly. Once the diameter is confirmed, check wheel width as well, especially if the car has aftermarket wheels or if the current tire size differs from the original setup now on the vehicle.
Why does the 2013 Audi A4 have more than one tire size?
The 2013 Audi A4 has more than one tire size because it was offered with different wheel packages. Base models use 17-inch fitments, while the 18 Inch Option and 19 Inch Option move to different low-profile radial sizes matched to those larger wheel diameters.
That means the model name alone is not enough when it is time to replace tires. Checking the exact sub-model description, the wheel diameter, and the tire size currently mounted on the car helps prevent ordering a size that belongs to a different A4 wheel package.
Choosing the Right Tire
What should I consider when choosing a 2013 Audi A4 tire?
Start with the correct size for the car's wheel package, since the 2013 Audi A4 uses four different radial fitments. After size, compare construction details within the available product range, including tire series, load figures where stated, rim-width compatibility, and whether the tire is aimed more at street use or a specialized purpose.
Appearance can matter too, especially because some 17-inch and 18-inch sizes are available in redline or RWL form while others stay blackwall only. Buyers should also match the tire choice to how the A4 is driven, whether that means everyday road use, a more aggressive performance look, or a more specialized setup.
What sidewall styles are available for 2013 Audi A4 tires?
Sidewall style depends on the tire size chosen for the 2013 Audi A4. Blackwall is available across all four sizes, while redline and RWL options appear in select 245/40R18 and 245/45R17 offerings through Pro-Trac's Street Pro III series.
That means sidewall appearance is part of the buying decision only after the correct size is confirmed. A4 owners with 17-inch or 18-inch setups may have more visual variety, while 19-inch fitment is centered on blackwall performance-style choices. The right pick depends on whether the goal is a cleaner modern look or a more distinctive sidewall presentation.
What brands offer tires for the 2013 Audi A4?
Tires for the 2013 Audi A4 are available from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster, depending on size. BFGoodrich appears across all four fitments, while Nitto covers several 17-inch and 18-inch sizes, and Pro-Trac and M&H Racemaster appear in more specific applications.
Brand choice should come after fitment is narrowed to the exact tire size on the car. Once size is settled, compare each brand's available series, sidewall style, and any stated rim-width or load information. That approach is more useful than choosing a brand first and then hoping it matches the A4's wheel setup.
Restoration & Appearance
Which tire should I choose for a period-style 2013 Audi A4?
A period-style 2013 Audi A4 tire choice starts with the exact size that matches the car's wheel package, then moves to sidewall and series selection. Blackwall tires keep the look closest to the clean modern sport-sedan presentation most buyers associate with this era, while select 17-inch and 18-inch sizes also offer redline or RWL alternatives.
The most convincing appearance usually comes from keeping the wheel diameter and tire proportions in line with the car's original setup. A4 owners interested in a restoration-oriented look should confirm the wheel package first, then choose the sidewall treatment that suits the car's intended style rather than treating every available cosmetic option as interchangeable.
How does tire construction affect the appearance of a restored 2013 Audi A4?
On a 2013 Audi A4, construction does not create a bias-ply-versus-radial appearance decision because the listed primary fitments are all radial. The visual difference comes more from the tire's profile, wheel diameter, and sidewall treatment than from a change in basic construction type.
That makes size accuracy especially important for an A4 that is being returned to a clean, proper stance. A 17-inch, 18-inch, or 19-inch setup changes the car's look immediately, and sidewall details such as blackwall, redline, or RWL further shape the final presentation once the correct fitment is confirmed.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 Audi A4?
Yes, modifications can affect tire fitment on a 2013 Audi A4. Changes such as aftermarket wheels, altered wheel width, offset differences, suspension lowering, or body modifications can all change how a 225/50R17, 245/45R17, 245/40R18, or 255/35R19 tire sits in the wheel well.
Even when the tire size itself is correct for an A4 configuration, a modified car may have different clearance needs at full steering lock or under suspension compression. It is smart to confirm wheel diameter, wheel width, and visible clearance before replacing tires, especially when the current setup no longer matches the car's original wheel package.
What should I inspect before driving a 2013 Audi A4 on new tires?
Before driving a 2013 Audi A4 on new tires, inspect the wheels for damage, confirm that all four tires match the intended size and rim diameter, and make sure inflation is set correctly for the vehicle's needs. It also helps to check valve stems, lug hardware, and the general condition of the suspension and alignment.
A short visual check after installation can prevent larger issues later. Look for any rubbing at the fenders or inner wheel wells, especially if the A4 has larger wheels or non-stock suspension height. After the first drives, recheck pressure and watch for uneven wear patterns that could point to alignment or wheel-fit issues.
How often should tires on a 2013 Audi A4 be inspected?
Tires on a 2013 Audi A4 should be inspected regularly, not just when tread looks low. A monthly pressure and condition check is a sensible routine, with a closer inspection before longer trips and any time the car shows vibration, pulling, air loss, or visible wear changes.
Inspection should include tread depth, cuts, bulges, cracking, and uneven wear across the contact patch. On an A4 that sees limited use, age and storage conditions matter almost as much as mileage. Cars that sit for long periods should have their tires checked for flat spotting, pressure loss, and sidewall aging before they return to regular road use.
