Audi A5 Tires

Audi A5 models from 2010 through 2014 use two tire sizes in this range: 245/40R18 and 255/35R19. The 245/40R18 size is built for an 18-inch rim, while 255/35R19 is built for a 19-inch rim. Both are metric radial sizes, and both appear across the full 2010-2014 span rather than being limited to early or late production years.

That means year alone does not identify the correct tire on an Audi A5. The practical step is to confirm the wheel diameter already on the car, then match the tire size to that wheel. If the car has 18-inch wheels, stay with 245/40R18; if it has 19-inch wheels, stay with 255/35R19 unless you are intentionally changing the complete wheel-and-tire package.

A 245/40R18 tire on an Audi A5 is a metric radial size. The 245 figure is the nominal section width in millimeters, 40 is the aspect ratio, meaning the sidewall height is 40 percent of that width, R identifies radial construction, and 18 is the wheel diameter in inches. That size is used on Audi A5 applications equipped with 18-inch wheels from 2010 through 2014.

Understanding the code helps prevent one of the most common buying mistakes, which is focusing on width alone and missing the required rim diameter. A 245/40R18 cannot be mounted on a 19-inch wheel, even though the overall look may seem similar to nearby sizes. On an Audi A5, confirm the tire sidewall and the wheel diameter together before replacing a single tire or a full set.

A 2012 Audi A5 has two tire sizes listed because both 245/40R18 and 255/35R19 were used across the model range in that year. The split is a rim-diameter split, not a construction split, since both sizes are radial. One setup uses an 18-inch wheel and the other uses a 19-inch wheel.

That makes wheel identification more important than model year by itself. If your Audi A5 still has its existing wheels, the quickest check is the tire sidewall already fitted or the wheel diameter itself. If the car has changed hands or has aftermarket wheels, verify the actual wheel size on the car rather than assuming the original equipment package remained unchanged.

Audi A5 fitments in this range use either an 18-inch or 19-inch rim diameter. The 245/40R18 size belongs on 18-inch wheels, and the 255/35R19 size belongs on 19-inch wheels. Both rim diameters appear from 2010 through 2014.

Because the same production years can carry either wheel diameter, the safest approach is to inspect the actual wheels before choosing tires. This is especially important if the car has optional wheels, upgraded wheels, or a previous owner’s changes. Matching the tire to the wheel diameter is the first fitment check; only after that should you compare brand, sidewall style, and tread type.

A 2013 Audi A5 can use either 245/40R18 or 255/35R19, so the correct tire size depends on which wheel package the car has. The first size requires an 18-inch rim, and the second requires a 19-inch rim. Both sizes were used during the same model year.

Start with the size molded into the current tire sidewall, then confirm it matches the wheel diameter on the car. If the car has aftermarket wheels or staggered cosmetic changes, measure carefully and compare front and rear if needed. Once the basic size is confirmed, you can narrow the choice by preferred brand, sidewall style, and the intended use of the Audi A5.

Audi A5 tire offerings here are mostly blackwall, with additional redline and RWL options available in 245/40R18. The 255/35R19 products listed are blackwall only. That means sidewall choice is broader on the 18-inch fitment than on the 19-inch fitment.

For most factory-style modern Audi A5 presentations, blackwall remains the most natural visual match. Redline and raised white letter styling create a more custom appearance and suit buyers who want the car to stand apart from an original-looking setup. Sidewall style does not override fitment, so confirm the correct 18-inch or 19-inch size first and then choose the look that fits the build.

The Audi A5 tire options listed here come from M&H Racemaster, BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in both listed sizes, while M&H Racemaster, Nitto, and Pro-Trac are represented in 245/40R18. All of the products in this group are radial construction.

Brand choice matters once the size is settled, because each line reflects a slightly different use case and visual style. A buyer focused on a conventional blackwall road setup will see a different mix than someone looking for a drag-oriented tire or a custom sidewall treatment. After confirming size, compare the intended driving use, sidewall appearance, and wheel width range where stated.

Audi A5 tire series in this group include Drag Radial, g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, Nitto NT555 G2, and Street Pro III. All are radial designs, but they represent different product families rather than one uniform tread concept. Some are geared toward performance street use, one is a drag-oriented rear tire, and Street Pro III appears with custom sidewall presentations.

That variety means the right choice depends on how the Audi A5 is actually used. A car driven on the street with a stock-style appearance goal may call for a different series than a custom build or a straight-line performance project. Once the correct size is confirmed, compare the series name, sidewall style, and stated wheel-width compatibility to narrow the field.

An Audi A5 stored on its tires should be kept in a cool, dry, dark environment away from direct sunlight, ozone sources, and long-term heat exposure. Maintain the tires at proper inflation during storage and keep the car on a clean surface rather than bare earth. If the car will sit for extended periods, moving it occasionally helps reduce flat spotting.

Modern radial tires tolerate use well, but a low-use enthusiast Audi A5 can still age out its tires before the tread wears away. If the car rests for months at a time, clean the tires, inspect the sidewalls, and avoid dressing products that can mask cracking. Thoughtful storage preserves both appearance and drivability when the car returns to the road.

Tires on an Audi A5 should be inspected before regular driving and again any time the car has been stored for a long stretch. Look for cracking, punctures, bulges, unusual shoulder wear, and signs of impact damage from potholes or curbing. Uneven wear can also point to alignment or suspension issues rather than a tire problem alone.

A modern performance-oriented size like those used on the Audi A5 deserves more than a quick glance at tread depth. Check inflation pressure with a gauge, look across the full tread face, and inspect the inner sidewall if possible. On collector-driven cars, age, storage, and underuse often matter just as much as mileage when judging tire condition.

Audi A5 tires should be replaced when they show age cracking, impact damage, repeated air loss, bulges, or other structural concerns even if the tread still looks serviceable. Tread depth alone is not a complete measure of tire health on a low-mileage enthusiast car. Any sign that the casing or sidewall is deteriorating is a valid reason to remove the tire from service.

This is especially relevant for Audi A5 models that spend long periods parked and accumulate little wear each season. A tire can appear visually presentable yet still be compromised by age, storage history, or repeated heat cycles. If there is any doubt, have the tires evaluated by a knowledgeable tire professional before continued road use rather than relying on appearance alone.

Audi A5 tires in these sizes can be suitable for public-road use when the tire matches the wheel diameter, is in sound condition, and is appropriate to the car’s intended driving use. The listed offerings are all radial tires, but they are not all aimed at exactly the same purpose. A drag-oriented rear tire should be evaluated differently from a conventional street-focused performance radial.

Safety starts with using the correct 18-inch or 19-inch fitment and then choosing a tire family that suits how the Audi A5 will actually be driven. After installation, inspect inflation, clearance, and overall condition before regular use. Public-road confidence comes from proper fitment and condition, not simply from the size code matching the sidewall.

Before driving an Audi A5, check tire pressure, sidewall condition, tread wear, and the wheel-and-tire size already fitted to the car. For this model range, the critical fitment point is whether the car is on 245/40R18 tires with 18-inch wheels or 255/35R19 tires with 19-inch wheels. Also look for visible cuts, bubbles, or objects embedded in the tread.

If the Audi A5 has been parked for a while, pay attention to flat spotting, vibration on initial movement, and any pull that suggests pressure loss or alignment trouble. A quick pre-drive walkaround can prevent running an underinflated or damaged tire at road speed. That matters even more on a performance-oriented coupe where wheel and tire condition strongly affect stability and response.

The appropriate speed for an Audi A5 depends on using the exact tire fitted to the car, keeping it in proper condition, and respecting the service category of that tire. The available products here are modern radial performance-oriented tires, but that does not mean every option should be treated the same in every environment. Tire condition, inflation, wheel fit, and intended use all matter alongside the size itself.

For real-world driving, treat the installed tire’s markings and condition as the final authority rather than assuming all 18-inch or 19-inch Audi A5 tires behave identically. A well-maintained street radial and a specialized drag-oriented rear tire are built around different priorities. Stay within the tire’s intended use and keep the entire wheel-and-tire package in good condition before exploring the car’s performance.