The 2013 Audi A3 blends compact Audi packaging with the sharp, road-focused feel that made the model a strong choice for drivers who wanted premium hatchback practicality without giving up responsive handling. By this point in the A3’s run, wheel and tire selection played a visible role in both stance and driving character. This model uses radial tire fitments in 225/45R17 and 225/40R18, so the first step is confirming which wheel diameter is on the car. Available choices include blackwall performance-oriented options, plus select 17-inch alternatives with raised white letter or redline sidewalls. For an unmodified A3, the key is matching the tire to the wheel, intended appearance, and everyday road use.
Which Tire Size Is Right for The 2013 Audi A3
The 2013 Audi A3 uses two primary tire sizes, and the difference comes down to wheel diameter first. Both the Base and TDI can use 225/45R17 on a 17-inch rim or 225/40R18 on an 18-inch rim, so identifying the wheels currently on the car is the starting point. Once that is confirmed, the decision shifts to comparing radial tire series, sidewall style, and rim-width compatibility within the correct size.
In 225/40R18, the 225 is the section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. On the 2013 Audi A3, this size supports the larger-wheel fitment and keeps the buyer in a modern radial format suited to the car’s contemporary handling character. Available choices come from BFGoodrich and Nitto, with blackwall sidewalls and tire series including g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size is the one to evaluate when the car already wears 18-inch wheels and wheel width falls within the tire’s approved range.
In 225/45R17, the first number is the tire’s section width in millimeters, 45 is the aspect ratio, R marks it as a radial, and 17 is the required rim diameter in inches. For the 2013 Audi A3, this size covers the 17-inch wheel fitment and opens up a broader mix of product styles than the 18-inch option. Choices include BFGoodrich, Nitto, and Pro-Trac offerings, with blackwall, raised white letter, and redline sidewall treatments across several tire series. This is the size to compare when the car has 17-inch wheels and the goal is balancing fitment, appearance, and tire-series preference.
Tire fitment is straightforward across the covered 2013 Audi A3 sub-models because both the Base and TDI use the same two tire sizes. The main check is not the trim level, but whether the car is currently on 17-inch or 18-inch wheels before selecting a tire.
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2013 Audi A3 Base
The 2013 Audi A3 Base can use either the 225/45R17 or 225/40R18 radial fitment, depending on which wheels are on the car. That means tire selection starts with wheel diameter confirmation, then moves to comparing available tire series, sidewall style, and rim-width suitability within the correct size.
The 2013 Audi A3 TDI shares the same two radial tire sizes as the Base model: 225/45R17 and 225/40R18. The practical decision is matching the tire to the actual wheel setup on the vehicle, then choosing among the available product styles and specifications in that size.
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 A3 Tires for Sale
Available 2013 Audi A3 tire choices center on 225/45R17 and 225/40R18 radial fitments from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare blackwall performance-oriented series in both sizes, while the 17-inch fitment also includes raised white letter and redline sidewall options.
These 2013 Audi A3 tire FAQs focus on the two factory-size fitments, wheel-diameter differences, radial tire selection, sidewall choices, and the fitment checks that matter before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2013 Audi A3?
The 2013 Audi A3 uses two primary tire sizes: 225/45R17 and 225/40R18. Both are radial tire fitments, and both the Base and TDI sub-models can use either size depending on the wheel diameter installed on the car.
The important distinction is that these sizes are tied to different rims, not separate body or trim-specific tire families. A3 owners should confirm whether the car has 17-inch or 18-inch wheels before choosing a tire, especially if the vehicle has changed hands or has had wheel upgrades at some point.
What size rim does a 2013 Audi A3 use?
A 2013 Audi A3 can use either a 17-inch or 18-inch rim, depending on which of its two tire sizes is on the car. The 225/45R17 tire fits a 17-inch wheel, while the 225/40R18 tire fits an 18-inch wheel.
Checking wheel diameter matters before looking at tread style, brand, or sidewall treatment. It is also smart to verify actual wheel width on the car, particularly if aftermarket wheels are installed, because available tires in these sizes have approved rim-width ranges that should match the wheel being used.
Do all 2013 Audi A3 sub-models use the same tire size?
The Base and TDI versions of the 2013 Audi A3 share the same two tire-size options: 225/45R17 and 225/40R18. That means the trim level does not create a separate tire-size requirement within the covered sub-models.
In practice, the real fitment check is the wheel package currently on the vehicle. Even though the sub-models share the same size options, one A3 may be on 17-inch wheels and another on 18-inch wheels, so the tire choice still depends on matching the tire to the wheel already fitted.
Choosing the Right Tire
What should I consider when choosing a 225/45R17 or 225/40R18 tire for a 2013 Audi A3?
Start with the correct size for the wheel on the car, since 225/45R17 and 225/40R18 are not interchangeable across the same rim diameter. From there, compare radial tire series, approved rim-width ranges, sidewall style, and any available load information that fits how the A3 is actually used.
The 17-inch and 18-inch fitments each offer different product mixes, so the choice often comes down to wheel setup and the kind of presentation you want. A daily-driven A3, a lightly modified car, and an appearance-focused build may all point toward different product selections within the same basic size.
What sidewall styles are available for 2013 Audi A3 tires?
Blackwall is the most common sidewall style offered for the 2013 Audi A3 in both 225/45R17 and 225/40R18. In the 225/45R17 size, there are also raised white letter and redline sidewall options through the Pro-Trac Street Pro III line.
That gives the 17-inch fitment more room for appearance-based selection, while the 18-inch size stays focused on blackwall performance-style options. Sidewall style does not override the need to match the correct tire size and wheel diameter, so appearance should be chosen only after basic fitment is confirmed.
What brands offer tires for the 2013 Audi A3?
Tires for the 2013 Audi A3 are available from BFGoodrich, Nitto, and Pro-Trac across its two primary sizes. BFGoodrich appears in both 17-inch and 18-inch fitments, Nitto also covers both sizes, and Pro-Trac is available in the 225/45R17 fitment.
Brand choice should be considered alongside tire series, sidewall treatment, and wheel compatibility rather than in isolation. Some buyers will focus on a blackwall performance look, while others may prefer the added style of raised white letter or redline sidewalls available in the 17-inch size.
Restoration & Appearance
Which tire should I choose for a period-style 2013 Audi A3?
A period-style approach for a 2013 Audi A3 usually starts with staying in the correct modern radial size for the wheel already on the car: 225/45R17 or 225/40R18. Blackwall tires are the most natural visual match for the model’s original-era appearance, especially on a stock or lightly modified example.
The 17-inch fitment does offer more visual variety, including raised white letter and redline options, but those create a more customized look than a restrained factory-era presentation. Buyers aiming for authenticity in overall appearance should match tire choice to the car’s current wheel package and broader visual theme.
How does tire construction affect the appearance of a restored 2013 Audi A3?
On a 2013 Audi A3, tire construction is straightforward because the primary fitments are radial. That means the appearance difference comes less from bias-ply versus radial concerns and more from profile, sidewall treatment, and the wheel diameter paired with either 225/45R17 or 225/40R18.
A stock-looking A3 usually benefits from a clean blackwall radial in the proper size, while a more personalized build may lean toward the 17-inch redline or raised white letter choices. Visual balance matters, so tire selection should support the car’s wheel design, ride height, and overall restoration or customization goal.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 Audi A3?
Yes, modifications can affect tire fitment on a 2013 Audi A3 even when the tire size itself looks correct. Aftermarket wheels, changes in wheel width, offset differences, suspension lowering, or body alterations can all change how a 225/45R17 or 225/40R18 tire sits and clears the car.
A modified A3 should be checked for inner clearance, fender clearance, and steering clearance before a new tire is selected. Wheel diameter alone is not enough, because a tire that suits one 17-inch or 18-inch wheel may not behave the same way on another wheel with different dimensions.
What should I inspect before driving a 2013 Audi A3 on new tires?
Before putting a 2013 Audi A3 back into regular road use on new tires, inspect wheel condition, confirm tire pressure, and make sure the selected size matches the wheel diameter on the car. It is also wise to check alignment-related wear patterns on the old tires so any underlying issue is addressed early.
A short test drive should include attention to rubbing, vibration, and steering response, especially if the car has non-stock wheels or suspension changes. Rechecking air pressure and visually inspecting the tire after the first few drives can help catch fitment or mounting issues before they become larger problems.
How often should tires on a 2013 Audi A3 be inspected?
Tires on a 2013 Audi A3 should be inspected regularly, not just when tread looks low. A quick visual check for cuts, bulges, irregular wear, and air loss is worthwhile every month, and any vibration or pull during driving should prompt a closer look sooner.
Cars that sit for long periods still need tire attention because age, storage conditions, and pressure loss can affect road readiness. It also helps to inspect more closely before a longer drive, paying attention to sidewall condition, remaining tread depth, and whether all four tires still match the intended wheel and use.
