2019 Audi Tire Fitment Guide

2019 Audi vehicles use 18 distinct tire sizes across the model range: 225/45R17, 225/50R17, 225/40R18, 245/40R18, 245/45R18, 235/35R19, 245/35R19, 245/45R19, 255/35R19, 255/45R19, 265/35R19, 255/30R19, 255/40R20, 265/40R20, 275/30R20, 265/30R20, 255/30R20, and 255/35R21. Rim diameters run from 17 to 21 inches, and rim-width guidance where available includes spans such as 6.0 to 8.0 inches for 225/50R17, 7.5 to 9.5 inches for 245/40R18, 8.5 to 10.0 inches for 255/35R19, and 9.0 to 10.5 inches for 265/35R19.

The practical takeaway is that 2019 Audi fitment is strongly model-specific. A3 and A3 Quattro sizes differ from A4-family cars, while A6, A7, A8, RS, S, and TT variants move into their own wheel diameters and widths. Before choosing a tire, verify the exact model, then confirm the wheel diameter already on the car, and then compare the tire size on the sidewall to the options associated with that model.

On a 2019 Audi tire, a size such as 225/40R18 is a metric radial size. The first number, 225, is the section width in millimeters. The second number, 40, is the aspect ratio, meaning the sidewall height is 40 percent of the section width. The R indicates radial construction, and 18 is the wheel diameter in inches.

That format applies across the entire 2019 Audi range here, whether the size is 225/45R17 on an A3, 245/40R18 on several A and S models, or 275/30R20 on an RS5. Once you understand the code, the most important step is matching every part of it to your car’s existing wheel package rather than choosing by width alone. A correct width with the wrong aspect ratio or wheel diameter is still the wrong fit.

No. 2019 Audi models do not share one universal tire size. The A3 and A3 Quattro use 225/45R17, 225/40R18, or 235/35R19, while the A4 and A4 Quattro use 225/50R17, 245/40R18, or 245/35R19. The A4 allroad uses 245/45R18, the A6 Quattro and A7 Sportback use 245/45R19, 255/40R20, or 255/35R21, and the RS, S, TT, and A8 models each follow their own fitment patterns.

That means year and make are only the starting point for a 2019 Audi tire search. Model name, wheel diameter, and in some performance applications the exact front or rear tire size all matter. If you are replacing one tire on a staggered setup or working with aftermarket wheels, compare the current sidewall marking and wheel size to the model-specific fitment before making a final choice.

2019 Audi tire options here are blackwall radials across every size with product coverage. That includes compact-car sizes such as 225/40R18 and 225/45R17, midsize applications like 245/40R18 and 245/35R19, larger executive-car sizes such as 245/45R19 and 255/40R20, and performance sizes like 265/35R19 and 275/30R20. No whitewall or vintage-style sidewall treatments appear in this group.

That blackwall look suits the design language of a modern 2019 Audi, where original appearance expectations center on contemporary performance styling rather than traditional collector-era sidewall details. Buyers usually make the next decision by size, brand, and speed rating instead of by cosmetic sidewall treatment. If visual consistency matters, replacing tires in axle pairs or full sets helps keep sidewall branding and tread character uniform around the car.

BFGoodrich and Nitto cover most 2019 Audi sizes here, and M&H Racemaster appears in 245/40R18. BFGoodrich spans many fitments including 225/40R18, 225/45R17, 225/50R17, 245/40R18, 245/35R19, 245/45R18, 255/35R19, 245/45R19, 255/40R20, and 265/35R19. Nitto also covers many key sizes including 225/40R18, 225/45R17, 235/35R19, 225/50R17, 245/40R18, 245/35R19, 245/45R18, 245/45R19, 265/35R19, and 275/30R20.

Brand choice on a 2019 Audi often comes down to whether your exact size has one brand or several, and whether you need a particular speed rating or rim-width range. Some sizes give you multiple brand paths, while others narrow the field quickly. Once the size is confirmed, compare the series within that size for load capacity, speed symbol, and intended use rather than assuming every brand offers the same specification.

For a 2019 Audi, BFGoodrich g-Force Comp 2 A/S and Nitto NT555 G2 overlap in several sizes, but their exact specifications differ by size. In 225/40R18, the BFGoodrich version fits 7.5 to 9.0-inch rims, while the Nitto fits 7.5 to 9.0 inches with an 8.0-inch measuring width and carries a 1,389-pound load figure at 50 psi. In 245/40R18, BFGoodrich fits 8.0 to 9.5-inch rims and Nitto does the same with an 8.5-inch measuring width and a 1,609-pound load figure at 50 psi.

The key point is that two tires with the same nominal size are not always identical in supporting details. A 2019 Audi owner comparing these series should look at rim-width compatibility, weight, speed symbol, and load figure within the exact size they need, rather than comparing only the brand names. That is especially useful when the car runs factory optional wheels or an aftermarket wheel width near the edge of the acceptable range.

Rim-width requirements on 2019 Audi tires vary by size. Examples include 7.0 to 8.5 inches for 225/45R17, 6.0 to 8.0 inches for 225/50R17, 7.5 to 9.0 inches for 225/40R18 and 245/45R18, 8.0 to 9.5 inches for 245/40R18 and 245/35R19, 8.5 to 10.0 inches for 255/35R19, 7.5 to 9.0 inches for 245/45R19, 8.5 to 10.0 inches for 255/40R20, and 9.0 to 10.5 inches for 265/35R19. Some tires within a size also note a preferred measuring width.

That matters because the right tire size can still be a poor match for a wheel that is too narrow or too wide. On a 2019 Audi with factory wheels, the original wheel package often keeps you in the normal range, but aftermarket wheels need a closer look. Check the wheel width stamp or manufacturer specification before choosing a tire, especially on S and RS cars where wheel widths can vary more widely.

The 2019 Audi tire products here are tubeless radial designs. One 245/40R18 BFGoodrich product carries a TL marking directly in the size string, and the rest follow the same modern tubeless passenger-tire pattern rather than an inner-tube construction. No tube-type passenger fitments appear in these 2019 Audi sizes.

For most 2019 Audi owners, that means the focus should be on wheel condition, bead sealing, and valve-stem condition rather than sourcing tubes. If the car has aftermarket wheels, inspect the bead seats carefully and confirm that the valve hardware matches the wheel design. A tubeless tire still needs an airtight wheel and valve assembly to perform as intended in everyday road use.

Original 2019 Audi wheels cannot be treated as universal across all sizes because the model range uses multiple wheel diameters: 17, 18, 19, 20, and 21 inches. A tire such as 225/45R17 only fits a 17-inch wheel, while 245/40R18 fits an 18-inch wheel, 255/35R19 fits a 19-inch wheel, and 255/35R21 fits a 21-inch wheel. Diameter alone makes those fitments distinct.

Within an individual model, original wheels can often support more than one size only when the wheel diameter matches and the rim width falls inside the tire manufacturer’s range. That is why a 2019 Audi owner should confirm both wheel diameter and wheel width before changing sizes. This becomes especially important on cars such as the S5, A6, A7, and A8, where several factory wheel-package diameters were used.

A stored 2019 Audi should be kept in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can accelerate rubber aging. Keep the tires clean, maintain inflation pressure, and move the car periodically so the same section of tread is not carrying the load for months at a time. If the car will sit for a long period, tire cradles or properly placed stands can help reduce flat-spotting pressure on the contact patch.

Modern radial tires tolerate storage better than many older bias-ply designs, but they still age from time, heat, and environment. A 2019 Audi that sees occasional use often benefits from a monthly roll, a pressure check, and a quick sidewall inspection. If the car is a seasonal performance model, storing it on clean, dry floors and avoiding chemical exposure does as much for tire life as low mileage does.

On a 2019 Audi, tire life should be judged by age, condition, and service history as much as by tread depth. A good working rule is to evaluate tires closely once they reach about five to seven years of age and to treat around ten years as a strong replacement point even if tread remains. The DOT date code on the sidewall tells you when the tire was built, which is especially important on a car driven only occasionally.

Low annual mileage can make older tires look deceptively healthy, particularly on premium cars that spend much of their time garaged. Heat cycles, storage conditions, and long periods of sitting all matter. A 2019 Audi used for seasonal touring or weekend driving should have its tire age reviewed as part of annual maintenance so the car does not end up running on rubber that has aged out before it has worn out.

Tires on a 2019 Audi should be inspected before every drive and again before any longer highway outing. Check inflation pressure, visible tread wear, cuts, bulges, punctures, and any cracking at the sidewall or tread shoulder. On higher-performance models with lower-profile tires, also look closely for impact damage from potholes and verify that the tire is wearing evenly across the tread face.

That inspection routine matters because many 2019 Audi models use wide, short-sidewall tires that can disguise internal or edge damage until it becomes more serious. A quick walk-around catches problems earlier and helps you spot alignment or suspension issues before they ruin a costly set of tires. If one tire repeatedly loses pressure, inspect the valve stem and wheel sealing surface as well as the tread and sidewall.

Yes, the 2019 Audi tire products here are highway-capable radial tires, and many carry W or Y speed ratings. W-rated tires are rated up to 112 mph, while Y-rated tires are rated for 186+ mph. Several sizes such as 235/35R19, 245/45R18, 255/35R19, 245/45R19, and 265/35R19 include both W- and Y-rated options depending on the exact product, while others such as 255/40R20 appear only with a Y rating and 275/30R20 appears with a W rating.

For normal U.S. highway driving, the car’s condition, alignment, brakes, suspension, and inflation pressure often matter more than the top-end speed symbol alone. A 2019 Audi should still be driven within the limits of the exact tire installed, especially if the car is an S or RS model that can cover speed quickly. Matching speed ratings across an axle is a smart baseline when replacing fewer than four tires.

Inflation pressure on a 2019 Audi should follow the vehicle’s factory recommendation first, with the tire manufacturer’s maximum-pressure marking used as a limit rather than a blanket running pressure. Several tires here include load-and-pressure figures such as 1,389 pounds at 50 psi for some 225/40R18 products, 1,653 pounds at 50 psi for one 225/50R17 product, 1,764 pounds at 50 psi for some 245/45R18 products, and 1,819 pounds at 50 psi for 255/40R20.

Those figures should not be transferred from one size to another or used as a universal setting for every 2019 Audi model. The correct everyday pressure depends on the car, axle load, and tire size actually fitted. Check the driver-door placard or owner’s manual for the vehicle recommendation, then compare that with the sidewall and manufacturer guidance for the exact tire you are using.

Before a longer drive in a 2019 Audi, inspect each tire for cracking, cuts, punctures, bulges, uneven wear, and proper cold inflation pressure. Confirm that tread depth is appropriate across the full width of the tire, not just at the center, and make sure the valve stems are secure and undamaged. If the car uses a staggered setup, verify that front and rear sizes have not been mixed incorrectly during previous service.

Tires are only one part of the pre-trip checklist on a modern performance or luxury car, but they are the part that touches the road. A 2019 Audi also deserves a quick look at brakes, fluid levels, and suspension condition before a longer run, especially if it has sat for a period. Checking the spare or mobility kit at the same time prevents a minor tire issue from turning into a major interruption.