The 2020 Audi A3 sits at the compact luxury end of the modern sport-sedan market, blending sharp European proportions with the kind of everyday usability that keeps these cars appealing long after new-car showroom days are over. For tire selection, that matters because the A3 uses low-profile radial fitments that support its responsive character. This model uses either 225/40R18 or 235/35R19, with fitment varying by sub-model and wheel setup. Available choices center on blackwall performance-oriented radial tires from BFGoodrich and Nitto across several series. The key decision is confirming the exact sub-model and rim diameter first, then choosing the tire that best matches road use, appearance, and wheel compatibility.
Which Tire Size Is Right for The 2020 Audi A3
The 2020 Audi A3 uses two primary tire sizes, and the correct choice depends first on confirming the exact sub-model and wheel diameter. Both fitments are radial low-profile metric sizes, but one uses an 18-inch rim and the other uses a 19-inch rim, so matching the tire to the wheel already on the car is the first step before comparing brands or tire series.
225/40R18 is a metric radial size in which 225 identifies the nominal section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 18 is the rim diameter in inches. On the 2020 Audi A3, this fitment supports the car's modern low-profile handling character while keeping the selection within an 18-inch wheel package. Available choices in this size include BFGoodrich and Nitto blackwall tires across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size is the right place to focus when the car carries 18-inch wheels and the goal is choosing among performance-oriented radial options.
235/35R19 is a metric radial size with a 235-millimeter nominal section width, a 35-series profile, radial construction, and a 19-inch rim diameter. For the 2020 Audi A3, it represents the larger wheel fitment and keeps the tire choice aligned with a distinctly low-profile setup. Product choices in this size include blackwall radial tires from Nitto and BFGoodrich, including the NT555 G2 and g-Force Phenom T/A series. This fitment should be evaluated when the car already wears 19-inch wheels and the priority is matching that wheel diameter while comparing the available performance-focused tire lines.
Sub-model fitment matters on the 2020 Audi A3 because tire size is not the same across every covered configuration. The first step is confirming whether the car is a Premium Sedan or Premium Plus Sedan, then matching the tire to the wheel diameter already in place.
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2020 Audi A3 Premium Plus Sedan
The 2020 Audi A3 Premium Plus Sedan can use either 225/40R18 or 235/35R19 radial tires, depending on the wheel setup on the car. That makes wheel-diameter confirmation especially important before selecting a tire series, comparing brands, or ordering a replacement.
The 2020 Audi A3 Premium Sedan uses the 225/40R18 radial fitment rather than the larger 19-inch option. Tire selection is more straightforward here, with the main decision shifting to brand, tire series, and compatibility with the existing 18-inch wheels.
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 2020 Audi A3 Tires for Sale
Available 2020 Audi A3 tire choices focus on 225/40R18 and 235/35R19 blackwall radial performance tires from BFGoodrich and Nitto. The product grid lets you compare series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, along with rim-width compatibility where stated.
Owners shopping tires for a 2020 Audi A3 usually need to confirm size, wheel diameter, and sub-model fitment first. The questions below focus on those points, along with product selection, maintenance, and what to inspect before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2020 Audi A3?
The 2020 Audi A3 uses either 225/40R18 or 235/35R19, depending on the sub-model and wheel setup. Both are radial metric sizes, but they are built for different rim diameters, so they are not interchangeable choices unless the wheel package matches the tire.
The practical first step is checking the exact sub-model and then confirming whether the car has 18-inch or 19-inch wheels. A Premium Sedan uses 225/40R18, while a Premium Plus Sedan may use either size, which makes the actual wheel diameter on the car especially important before selecting a replacement tire.
What size rim does a 2020 Audi A3 use?
The 2020 Audi A3 uses either an 18-inch or 19-inch rim, depending on the tire size fitted to the car. The 225/40R18 fitment uses an 18-inch rim, while the 235/35R19 fitment uses a 19-inch rim.
That rim diameter must match the tire exactly, so the wheel should be confirmed before shopping by size alone. Looking only at the model year is not enough on this A3, because the Premium Plus Sedan can appear with either wheel diameter and therefore with two different primary tire sizes.
Why does the 2020 Audi A3 have more than one tire size?
The 2020 Audi A3 has more than one tire size because fitment varies by sub-model and wheel package. The Premium Sedan uses 225/40R18, while the Premium Plus Sedan can use either 225/40R18 or 235/35R19.
That means the correct replacement is determined by the actual configuration of the car rather than by model name alone. Checking the existing tire sidewall, measuring wheel diameter, and confirming whether the car still has its original wheel setup will help avoid choosing a tire that matches the year and model but not the wheel package.
Choosing the Right Tire
What should I consider when choosing a 225/40R18 tire for a 2020 Audi A3?
For a 2020 Audi A3 using 225/40R18, the main considerations are staying with the correct size, confirming 18-inch wheel compatibility, and comparing the available radial tire series. Choices in this size include BFGoodrich and Nitto blackwall tires, with rim-width guidance commonly centered around 7.5 to 9.0 inches where stated.
After size is confirmed, the decision usually comes down to how the car is driven and which tire line best suits that use. Comparing series, stated rim-width range, and load information where available gives a clearer picture than choosing by brand name alone, especially on a compact sport sedan with a low-profile tire setup.
What sidewall styles are available for 2020 Audi A3 tires?
The available tires for the 2020 Audi A3 use a blackwall sidewall style. That applies across the listed 225/40R18 and 235/35R19 product choices, keeping the appearance in line with the clean, modern look normally associated with contemporary sport-sedan fitments.
Since there is no sidewall-style split to sort through here, the more useful comparisons are tire series, brand, rim-width range where stated, and the correct wheel diameter. Once the right size is confirmed, blackwall keeps the selection simple and shifts the focus to fitment and the driving character expected from each radial line.
What brands offer tires for the 2020 Audi A3?
BFGoodrich and Nitto both offer tires for the 2020 Audi A3 in the covered sizes. The 225/40R18 fitment includes several BFGoodrich choices as well as a Nitto NT555 G2 option, while 235/35R19 is available from both Nitto and BFGoodrich.
Brand alone should not be the deciding factor on this car. It makes more sense to compare the exact size needed, the tire series within each brand, and wheel compatibility details such as stated rim-width range where available, especially since the A3 uses low-profile radial fitments that are sensitive to wheel-package differences.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Audi A3?
Yes, modifications can affect tire fitment on a 2020 Audi A3. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering, or body modifications can all change how a 225/40R18 or 235/35R19 tire sits in the wheelwell and how much clearance remains during turning or suspension movement.
That matters even when the tire size itself is correct for an original configuration. A changed setup should be checked for wheel diameter, width, and clearance at the fender, strut, and steering components before replacement tires are chosen, especially on a low-profile fitment where small changes in wheel package can have noticeable effects.
What should I inspect before driving a 2020 Audi A3 on new tires?
Before driving a 2020 Audi A3 on new tires, inspect the wheel diameter and condition, verify that the installed tire size matches the car's configuration, and check inflation pressure. It is also wise to look over the suspension and alignment condition, since uneven wear or handling issues can show up quickly on low-profile radial tires.
A short visual inspection should also include checking for rubbing marks, damaged wheels, and any signs that the previous tires wore unevenly. Taking a few extra minutes to confirm the car's setup helps the new tires start out on the right footing and reduces the chance of discovering a clearance or wear issue after the car is back in regular use.
How often should tires on a 2020 Audi A3 be inspected?
Tires on a 2020 Audi A3 should be inspected regularly rather than only at replacement time. A low-profile fitment like 225/40R18 or 235/35R19 benefits from routine checks for tread wear, cuts, punctures, sidewall damage, and pressure loss, since these tires have less sidewall height to visually mask problems.
Inspection is especially important before longer drives, after striking potholes, or whenever the steering feel changes. Looking at the inner and outer shoulders for irregular wear can also help catch alignment or suspension issues early, which is useful on a modern compact luxury sedan where tire condition has a direct effect on ride quality and response.
