2020 Audi A4 Tires

The 2020 Audi A4 uses three possible tire sizes: 225/50R17, 245/40R18, and 245/35R19. All three are radial sizes, and the correct one depends on the sub-model and wheel package rather than the model name alone.

The practical first step is to confirm the car’s actual wheel diameter before choosing a tire. A Premium may use 17-inch or 18-inch fitment, while Premium Plus and Prestige can use 18-inch or 19-inch fitment, so the correct tire starts with matching the wheel on the car rather than assuming every A4 uses the same size.

A 2020 Audi A4 uses 17-inch, 18-inch, or 19-inch rims depending on trim and tire size. The 225/50R17 tire uses a 17-inch rim, 245/40R18 uses an 18-inch rim, and 245/35R19 uses a 19-inch rim.

Rim diameter should be verified before anything else because each tire size is built around a specific wheel size. Looking at the current tire sidewall or measuring the wheel setup already on the car is often the quickest way to avoid ordering the right width and profile on the wrong diameter.

No, the 2020 Audi A4 sub-models do not all use the same tire size. Premium uses 225/50R17 or 245/40R18, while Premium Plus and Prestige use 245/40R18 or 245/35R19.

That overlap can make 245/40R18 look universal, but it should not replace checking the exact trim and wheel package on the car. A4s that have changed hands, received wheel upgrades, or had seasonal wheel sets installed can differ from trim expectations, so the tire choice should always follow the wheel actually in service.

Start with the correct tire size for the specific 2020 Audi A4 trim and wheel diameter, then compare the radial tire series available in that size. Useful differences include brand, sidewall style, intended use, rim-width specification, and product details such as load figures where they are stated.

An A4 used mainly for normal street driving may call for a different choice than one built around a more aggressive look or specialized use. Matching the tire to the wheel first, then narrowing by series and appearance, keeps the process organized and helps prevent choosing a tire that suits the size but not the car’s setup or purpose.

Blackwall is the most common sidewall style across the 2020 Audi A4 tire sizes. In 245/40R18, there are also redline and raised white letter options, giving that particular size more visual variety than the 17-inch and 19-inch fitments shown here.

Sidewall style does not change the need to match the correct size and wheel diameter, but it can strongly affect how the car presents visually. Buyers looking for a cleaner modern appearance may stay with blackwall, while an 18-inch setup opens the door to a more distinctive look without stepping outside the proper radial size category.

Tires for the 2020 Audi A4 are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac across the applicable sizes. Depending on size, the available series include g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, NT555 G2, Drag Radial, and Street Pro III.

Brand choice should be considered alongside the exact size and intended use, not as a shortcut around fitment. Some sizes have broader variety than others, especially 245/40R18, so comparing series, sidewall treatment, and wheel compatibility within the correct size is a more useful approach than focusing on the brand name alone.

A period-style approach for a 2020 Audi A4 still begins with the correct modern radial size for the car’s trim and wheel diameter. The visual decision usually comes down to whether the goal is a clean blackwall presentation or, on some 245/40R18 applications, a more distinctive redline or raised white letter look.

Because this is a modern sport sedan rather than an older collector-era vehicle, appearance choices tend to be subtle and wheel-package driven. Keeping the correct size and profile relationship intact matters more than chasing novelty, especially if the car’s stance and overall design are part of the reason for preserving its original character.

On the 2020 Audi A4, construction does not create the old bias-ply-versus-radial appearance question because the applicable fitments here are radial. The visual differences come more from tire profile, sidewall treatment, and whether the car is on 17-inch, 18-inch, or 19-inch wheels.

That means appearance is best preserved by keeping the right size with the right wheel diameter and choosing a sidewall style that suits the car’s intended presentation. A lower-profile 19-inch setup will naturally look different from a 17-inch package even when both are properly fitted, so wheel and tire should be considered together.

Yes, modifications can affect tire fitment on a 2020 Audi A4. Aftermarket wheels, offset changes, lowered suspension, spacer use, or body changes can alter how a 225/50R17, 245/40R18, or 245/35R19 tire sits in the wheel opening and how much clearance remains during steering and suspension movement.

A car that no longer has its original wheel setup should be checked carefully before replacing tires by size alone. Confirming wheel diameter is only the start; wheel width, tire-to-fender clearance, and inner suspension clearance all matter, especially when profile gets shorter and wheel diameter gets larger.

Before driving a 2020 Audi A4 on new tires, inspect wheel condition, valve stems, inflation pressure, and basic clearance at the fenders and suspension. It also makes sense to confirm that the new tires match the wheel diameter and that there is no rubbing at full steering lock or through normal suspension travel.

Road use is smoother when the surrounding hardware is checked at the same time as the tire change. Alignment condition, uneven wear on the old tires, and any vibration history are worth noting early, since a correct new tire can still feel wrong if the wheel, suspension, or alignment needs attention.

Tires on a 2020 Audi A4 should be inspected regularly, not just when replacement is due. A routine check for tread wear, cuts, punctures, bulges, irregular shoulder wear, and pressure loss helps catch issues early, especially on lower-profile sizes where ride and handling changes may show up quickly.

Inspections are especially useful before longer drives, after pothole impacts, or whenever steering feel changes. Looking over the inner sidewall and tread surface matters too, since some damage is easy to miss from the outside alone, and a simple visual check can prevent chasing fitment problems that are really condition problems.