The 2026 Audi A5 Quattro sits squarely in the modern sport-luxury coupe and sedan conversation, blending Audi’s all-wheel-drive character with a chassis that rewards precise tire fitment. On this car, tire selection is less about vintage-style construction and more about matching the correct wheel package and preserving the balance Audi built into the platform. The 2026 Audi A5 Quattro uses radial tires in two primary sizes, 235/45R18 and 245/40R19, tied to 18-inch and 19-inch wheel setups. Available choices center on BFGoodrich g-Force series blackwall radials. The key is confirming the exact sub-model and wheel diameter before comparing series, load specs, and intended road use.
Which Tire Size Is Right for The 2026 Audi A5 Quattro
The 2026 Audi A5 Quattro uses two primary tire sizes, and the right one depends first on the exact sub-model and wheel diameter. Both fitments are radial, but one uses an 18-inch rim and the other uses a 19-inch rim, so confirming the wheel package matters before comparing tire series, load details, or overall driving priorities.
235/45R18 is a metric radial size in which 235 identifies the nominal section width in millimeters, 45 is the aspect ratio, R confirms radial construction, and 18 is the rim diameter in inches. On the 2026 Audi A5 Quattro, this size belongs to the 18-inch wheel fitment and keeps the selection focused on modern radial performance tires. Available options in this size come from BFGoodrich in blackwall form across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. It is the right size to evaluate when the car is equipped with the 18-inch setup and the goal is choosing among series and specification differences within that wheel package.
Fit(s): Premium, Premium Plus, Premium Plus w/S Line Black Optic Pkg., Premium w/S Line Black Optic Pkg., Prestige, and Prestige w/S Line Black Optic Pkg.
Construction: Radial|Rim: 19 in
245/40R19 is a metric radial size where 245 indicates nominal section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 19 identifies the rim diameter in inches. On the 2026 Audi A5 Quattro, this size corresponds to the 19-inch wheel fitment and is especially important on Black Optic package configurations that use only this setup. BFGoodrich offers this size in blackwall form through the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A lines. It is the size to confirm when the car has 19-inch wheels and the buyer wants to compare series character, rim-width compatibility, and load-related details.
Sub-model fitment matters on the 2026 Audi A5 Quattro because some trims can use either of the two primary sizes while Black Optic package versions are tied to the 19-inch setup. Identifying the exact trim and wheel package comes before comparing tires, since the two sizes are not interchangeable choices for the same wheel diameter.
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2026 Audi A5 Quattro Premium
The 2026 Audi A5 Quattro Premium can use either the 235/45R18 or 245/40R19 radial fitment, depending on the wheel package on the car. Tire selection starts with confirming whether it is on 18-inch or 19-inch wheels, then comparing the available BFGoodrich blackwall performance series in that size.
The 2026 Audi A5 Quattro Premium Plus also spans both primary radial sizes, with fitment tied to the actual wheel diameter in use. That makes wheel confirmation the first step, followed by choosing the tire series that best suits the car’s intended road use and overall setup.
2026 Audi A5 Quattro Premium Plus w/S Line Black Optic Pkg.
The 2026 Audi A5 Quattro Premium Plus w/S Line Black Optic Pkg. uses the 245/40R19 radial size rather than the 18-inch fitment. Tire selection here is more straightforward, with the decision centered on comparing the available BFGoodrich blackwall g-Force series within the 19-inch wheel package.
2026 Audi A5 Quattro Premium w/S Line Black Optic Pkg.
The 2026 Audi A5 Quattro Premium w/S Line Black Optic Pkg. uses the 245/40R19 radial fitment on a 19-inch wheel. Since the size is fixed to that setup, the next decision is choosing among the available BFGoodrich performance-oriented blackwall tires and confirming the wheel remains the original diameter.
The 2026 Audi A5 Quattro Prestige can be fitted with either 235/45R18 or 245/40R19 radial tires, depending on the wheel package on the vehicle. The practical step is verifying rim diameter first, then narrowing the choice by tire series, load specification, and how the car will be driven.
2026 Audi A5 Quattro Prestige w/S Line Black Optic Pkg.
The 2026 Audi A5 Quattro Prestige w/S Line Black Optic Pkg. uses the 245/40R19 radial size as its primary fitment. That simplifies the size question and shifts attention toward comparing the available BFGoodrich blackwall options and making sure the car still retains the correct 19-inch wheel setup.
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 2026 Audi A5 Quattro Tires for Sale
Available 2026 Audi A5 Quattro tires focus on 235/45R18 and 245/40R19 BFGoodrich blackwall radials, with choices across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. The product grid is most useful for comparing series character, rim-width compatibility, weight, and load-related details within the correct wheel diameter.
Common 2026 Audi A5 Quattro tire questions usually come down to identifying the correct size by trim and wheel package, then comparing radial tire series, rim fitment, and road-use considerations. The answers below focus on practical selection and setup checks for this exact model.
Tire Size & Fitment
What tire size fits a 2026 Audi A5 Quattro?
The 2026 Audi A5 Quattro uses two primary tire sizes: 235/45R18 and 245/40R19. Both are radial sizes, and the correct one depends on the trim and wheel package installed on the car rather than a single universal fitment across every version.
The practical first step is checking the actual wheel diameter on the vehicle. Some Premium, Premium Plus, and Prestige models can use either size, while Black Optic package versions use 245/40R19, so confirming the exact sub-model and wheel setup avoids choosing a tire for the wrong rim diameter.
What size rim does a 2026 Audi A5 Quattro use?
A 2026 Audi A5 Quattro uses either an 18-inch or 19-inch rim, depending on the tire size and trim configuration. The 235/45R18 fitment uses an 18-inch rim, and the 245/40R19 fitment uses a 19-inch rim.
That difference matters because a tire sized for an 18-inch wheel cannot be used on a 19-inch wheel, and the reverse is also true. Before selecting a replacement, verify the wheel diameter stamped on the tire sidewall and confirm the car has not been changed to an aftermarket wheel package.
Do all 2026 Audi A5 Quattro sub-models use the same tire size?
No, not every 2026 Audi A5 Quattro sub-model uses the same tire size. Premium, Premium Plus, and Prestige trims can be found with either 235/45R18 or 245/40R19, while the S Line Black Optic package versions use 245/40R19.
That means the sub-model name alone is helpful, but the wheel diameter still needs to be confirmed on the car. On trims that can carry either setup, the safest approach is to match the replacement tire to the size currently mounted and make sure the wheel package has not been changed since new.
Choosing the Right Tire
What should I consider when choosing a 2026 Audi A5 Quattro tire?
Start with the correct size for the car’s wheel package, either 235/45R18 or 245/40R19, and stay with a radial tire built for that rim diameter. From there, compare the available BFGoodrich choices by tire series, rim-width range, load details where stated, and the kind of driving the car will see.
The right decision often comes down to how the A5 Quattro is used day to day. A car that sees regular commuting, seasonal highway use, or more aggressive back-road driving may lead the buyer toward a different series, even when the correct size and blackwall presentation remain the same.
What brands offer tires for the 2026 Audi A5 Quattro?
The available tires for the 2026 Audi A5 Quattro are from BFGoodrich in both primary sizes, 235/45R18 and 245/40R19. Within that brand, the choices include the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series.
Since the current selection centers on one brand, the comparison is really between series rather than between manufacturers. That makes it easier to focus on the correct rim diameter, the intended use of the car, and product details such as rim-width compatibility and load figures where they are given.
What tire series are available for the 2026 Audi A5 Quattro?
The 2026 Audi A5 Quattro is available with BFGoodrich tires in three series: g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. These appear across the two primary sizes, giving buyers several modern radial choices within the correct fitment range.
Series selection matters because it is one of the main ways to compare tires once the size is confirmed. After matching the car to 18-inch or 19-inch wheels, look at the specific series offered in that size and compare details such as rim-width range, stated load specification, and how the tire will be used.
Restoration & Appearance
Does correct tire fitment matter for a 2026 Audi A5 Quattro restoration or preservation project?
Yes, correct tire fitment still matters on a 2026 Audi A5 Quattro, even though it is a modern vehicle rather than a traditional collector-era restoration candidate. Using the proper 235/45R18 or 245/40R19 size helps preserve the intended stance, wheel relationship, and overall presentation of the car.
Appearance is only part of the equation, because the wrong size can also change clearance and upset the balance between the wheel package and body design. A preservation-minded owner should confirm the original wheel diameter on the car and avoid assuming that another modern metric size will deliver the same result.
Which sidewall style suits a period-style 2026 Audi A5 Quattro?
The available sidewall style for the 2026 Audi A5 Quattro is blackwall, which matches the modern sport-luxury character of the car. In this application, the visual choice is less about classic whitewall or stripe treatments and more about selecting the right size and tire series within a clean contemporary presentation.
That makes the appearance decision fairly straightforward compared with an older collector vehicle. Once the proper 18-inch or 19-inch fitment is confirmed, the focus shifts to whether the chosen BFGoodrich series supports the look and use of the car without changing its wheel-package proportions.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2026 Audi A5 Quattro?
Yes, modifications can affect tire fitment on a 2026 Audi A5 Quattro. Changes such as aftermarket wheels, altered wheel widths, different offsets, suspension lowering, or body modifications can all influence how a 235/45R18 or 245/40R19 tire sits and clears during steering and suspension travel.
That matters even when the tire size itself looks close to the original setup. A modified car should be checked for wheel diameter, wheel width, inside and outside clearance, and any signs of rubbing before a replacement tire is chosen, especially on trims where both 18-inch and 19-inch packages exist.
What should I inspect before driving a 2026 Audi A5 Quattro on new tires?
Before driving a 2026 Audi A5 Quattro on new tires, inspect the wheel diameter, confirm the tire size matches the car’s setup, and make sure the tires are properly seated and inflated. It is also wise to look over the wheels for damage and confirm there is no immediate interference at full steering lock.
A short initial check drive can reveal vibration, rubbing, or an installation issue before the car is used more aggressively. After a brief run, recheck air pressure and look for any uneven contact marks, especially if the car has aftermarket wheels or uses the 19-inch package with tighter visual clearances.
How often should tires on a 2026 Audi A5 Quattro be inspected?
Tires on a 2026 Audi A5 Quattro should be inspected regularly, not just when tread looks worn. Frequent checks for air loss, cuts, bulges, uneven wear, and sidewall damage are especially important on a modern performance-oriented fitment such as 235/45R18 or 245/40R19.
A car that sees spirited use, rough pavement, or seasonal storage benefits from closer attention. Even when mileage is low, it helps to inspect the tires before longer drives and after impacts with potholes or road debris, since wheel damage or alignment changes can affect ride quality and tire life quickly.
