The 2018 Audi Trucks Q7 blends modern luxury-SUV comfort with the road manners expected from a premium German three-row platform. Buyers looking at this exact model are usually balancing original-style fitment, wheel size, and everyday drivability rather than searching for a vintage-style tire conversion. Tire selection centers on four primary radial sizes: 255/60R18, 255/55R19, 285/45R20, and 285/40R21, with fitment varying by sub-model and wheel package. That makes wheel diameter and trim identification especially important before choosing a replacement. For a stock Q7, the real goal is matching the correct size to the vehicle's existing setup and intended use.
Which Tire Size Is Right for The 2018 Audi Trucks Q7
The 2018 Audi Trucks Q7 uses four primary tire sizes, and the right one depends on the specific sub-model and wheel diameter. All four are radial metric sizes, but they are tied to different 18-inch, 19-inch, 20-inch, and 21-inch wheel setups. Before choosing a tire, confirm the exact Q7 trim and the wheel diameter currently on the vehicle, since that determines which size belongs on it.
Fit(s): Premium 2.0, Premium 3.0, Premium Plus 2.0, and Premium Plus 3.0
Construction: Radial|Rim: 19 in
The 255/55R19 size uses a 255-millimeter section width, a 55-series aspect ratio, radial construction, and a 19-inch rim. On the 2018 Audi Trucks Q7, it is one of the primary modern radial fitments used on certain Premium and Premium Plus configurations. Its overall proportions stay close to the other Q7 sizes, but it is built specifically around a 19-inch wheel. This is the size to evaluate when the vehicle already carries 19-inch factory-style wheels and you want to keep the existing wheel diameter rather than moving to another package.
Fit(s): Premium 2.0, Premium 3.0, Premium Plus 2.0, and Premium Plus 3.0
Construction: Radial|Rim: 18 in
The 255/60R18 size combines a 255-millimeter section width with a 60-series profile and radial construction for use on an 18-inch rim. On the 2018 Audi Trucks Q7, it serves as one of the stock-type fitments for several Premium and Premium Plus versions. Compared with the other Q7 sizes, this one is tied specifically to the 18-inch wheel setup rather than a different trim-wide replacement. It is the appropriate choice when the vehicle is equipped with 18-inch wheels and the goal is to stay with the wheel diameter already on the SUV.
Fit(s): Premium 2.0, Premium 3.0, Premium Plus 2.0, Premium Plus 3.0, and Prestige
Construction: Radial|Rim: 20 in
The 285/45R20 size is a wider metric radial that uses a 285-millimeter section width, a 45-series profile, and a 20-inch rim. For the 2018 Audi Trucks Q7, it appears across multiple sub-models, including Premium, Premium Plus, and Prestige applications, making it one of the broadest shared fitments in the range. Its role is less about being a universal substitute and more about matching the Q7's existing 20-inch wheel package. This is the size to focus on when the vehicle already runs 20-inch wheels and you want to preserve that setup.
The 285/40R21 size pairs a 285-millimeter section width with a lower 40-series profile in a radial tire made for a 21-inch rim. On the 2018 Audi Trucks Q7, this fitment is used on Prestige configurations that carry the larger 21-inch wheel setup. It shares the same general modern metric sizing language as the other Q7 options, but its shorter sidewall and larger rim diameter make wheel confirmation especially important. This is the size to consider when the SUV is already equipped with 21-inch wheels and that original wheel format is being retained.
Tire fitment for the 2018 Audi Trucks Q7 depends on the exact sub-model and the wheel package on the vehicle. Several Premium and Premium Plus versions share the same three size choices, while Prestige uses a different two-size pattern that includes the 21-inch fitment.
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2018 Audi Trucks Q7 Premium 2.0
The 2018 Audi Trucks Q7 Premium 2.0 uses three radial tire sizes, tied to 18-inch, 19-inch, or 20-inch wheel setups. The key step is matching the replacement tire to the wheel diameter currently on the vehicle rather than choosing among those sizes by appearance alone.
The 2018 Audi Trucks Q7 Premium 3.0 follows the same three-size radial pattern used on other Premium and Premium Plus versions. Tire selection comes down to confirming whether the SUV carries the 18-inch, 19-inch, or 20-inch wheel package before ordering replacements.
The 2018 Audi Trucks Q7 Premium Plus 2.0 also uses three radial size options depending on wheel package. That means the correct replacement choice starts with checking the installed wheel diameter, then selecting the matching tire size to keep the vehicle's fitment consistent.
The 2018 Audi Trucks Q7 Premium Plus 3.0 shares the same three radial fitment choices found on other non-Prestige versions. Buyers should verify which wheel package is on the vehicle first, since the correct tire is determined by that setup rather than the trim name alone.
The 2018 Audi Trucks Q7 Prestige uses two radial sizes, centered on 20-inch or 21-inch wheel configurations. That makes wheel confirmation especially important, because the 21-inch fitment is unique to this sub-model group and should not be chosen without checking the existing 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.
Frequently Asked Questions
Common questions for the 2018 Audi Trucks Q7 usually center on identifying the correct tire size by sub-model, matching the tire to the wheel diameter already on the vehicle, and checking fitment, condition, and maintenance before regular road use.
Tire Size & Fitment
What tire size fits a 2018 Audi Trucks Q7?
The 2018 Audi Trucks Q7 uses four primary tire sizes: 255/60R18, 255/55R19, 285/45R20, and 285/40R21. All are radial metric sizes, but they do not apply across every version of the Q7. Premium and Premium Plus models use 18-inch, 19-inch, or 20-inch fitments, while Prestige uses 20-inch or 21-inch fitments.
The correct choice depends on the exact sub-model and, just as importantly, the wheel diameter currently installed on the SUV. Many Q7s may have changed wheels during ownership, so the safest approach is to confirm the trim, inspect the existing wheel size, and match the replacement tire to that setup before moving forward.
What size rim does a 2018 Audi Trucks Q7 use?
A 2018 Audi Trucks Q7 can use 18-inch, 19-inch, 20-inch, or 21-inch rims depending on sub-model and wheel package. The 255/60R18 tire fits an 18-inch rim, 255/55R19 fits a 19-inch rim, 285/45R20 fits a 20-inch rim, and 285/40R21 fits a 21-inch rim.
Rim diameter is the first thing to verify because each tire size is built around a specific wheel diameter and cannot be mixed casually. A Q7 with 20-inch wheels needs the corresponding 20-inch tire size, while a Prestige with 21-inch wheels needs the 21-inch fitment checked separately from other trims.
Why does the 2018 Audi Trucks Q7 have more than one tire size?
The 2018 Audi Trucks Q7 has more than one tire size because different sub-models and wheel packages use different factory-style wheel diameters. Premium and Premium Plus versions can use 18-inch, 19-inch, or 20-inch tire packages, while Prestige uses either 20-inch or 21-inch fitments.
That means tire selection is really a wheel-package question first and a tire-brand question second. Two Q7s from the same model year may need different sizes even if they look similar at a glance, so checking the exact trim and physically confirming the wheel diameter helps avoid ordering the wrong tire.
Choosing the Right Tire
What should I consider when choosing a 2018 Audi Trucks Q7 tire?
Start with the correct size for the vehicle's existing wheel setup: 255/60R18, 255/55R19, 285/45R20, or 285/40R21. Since the 2018 Audi Trucks Q7 uses multiple wheel diameters across its range, the right tire is determined by the sub-model and the wheels actually on the SUV, not by model year alone.
After size is confirmed, focus on maintaining a consistent fitment across all four corners unless the vehicle is set up differently by design. It also helps to inspect the current wheels for prior changes, damage, or non-stock dimensions, because an altered wheel package can affect which replacement tire size is appropriate.
How do I choose between the available 2018 Audi Trucks Q7 tire sizes?
The available sizes are not interchangeable choices for personal preference alone; they correspond to specific wheel diameters and trim-level setups. A 255/60R18 belongs with an 18-inch wheel, a 255/55R19 with a 19-inch wheel, a 285/45R20 with a 20-inch wheel, and a 285/40R21 with a 21-inch wheel.
Choosing between them starts with the wheel already on the Q7. If the SUV has been modified with different wheels than it left with, compare the current rim diameter and overall fitment carefully before selecting a tire, since the correct replacement follows the installed wheel package rather than the original brochure specification.
Which tire size should I use for my 2018 Audi Trucks Q7 sub-model?
The answer depends on the sub-model. Premium 2.0, Premium 3.0, Premium Plus 2.0, and Premium Plus 3.0 can use 255/60R18, 255/55R19, or 285/45R20, while Prestige uses 285/45R20 or 285/40R21. Every one of those sizes is a radial fitment matched to a specific wheel diameter.
Sub-model identification narrows the range, but the final check is still the wheel on the vehicle. A Prestige owner should not assume the Q7 has 21-inch wheels without looking, and a Premium owner should confirm whether the SUV carries 18-inch, 19-inch, or 20-inch wheels before choosing replacement tires.
Restoration & Appearance
Does correct tire fitment matter for a 2018 Audi Trucks Q7 restoration or original-style refresh?
Yes, correct tire fitment matters even on a newer collector-oriented SUV or an original-style refresh. The 2018 Audi Trucks Q7 uses distinct wheel-and-tire combinations by trim, so keeping the correct size with the correct wheel diameter helps preserve the vehicle's intended stance and overall presentation.
An appearance-focused replacement starts with matching the existing wheel package rather than mixing sizes from another Q7 sub-model. Owners who want the most authentic result should also compare the current wheels against vehicle-specific sales literature, window-sticker records, or marque references before deciding that the installed setup reflects how the SUV was originally configured.
How does tire size affect the appearance of a 2018 Audi Trucks Q7?
Tire size has a noticeable effect on the look of a 2018 Audi Trucks Q7 because each size is paired with a different wheel diameter and sidewall proportion. The 18-inch and 19-inch setups carry a taller sidewall appearance, while the 20-inch and 21-inch combinations create a larger-wheel, lower-profile presentation.
That visual difference is one reason it is important to keep the tire matched to the wheel package already on the vehicle. Moving from one Q7 fitment to another changes more than the numbers on the sidewall, so owners concerned with preserving an original-style appearance should confirm the intended wheel-and-tire combination before replacing anything.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Audi Trucks Q7?
Yes, modifications can affect tire fitment on a 2018 Audi Trucks Q7. Changes such as aftermarket wheels, altered wheel widths, suspension lowering, or body modifications can change the tire size that works properly, even if the SUV originally used one of the stock radial sizes like 255/55R19 or 285/45R20.
A modified Q7 should be checked as it sits today rather than assumed to follow original trim-based fitment. Wheel diameter, wheel width, offset, and clearance around the fenders and suspension all matter, so it is smart to inspect the actual setup carefully before selecting replacement tires for regular street use.
What should I inspect before driving a 2018 Audi Trucks Q7 on new tires?
Before driving a 2018 Audi Trucks Q7 on new tires, inspect the wheel condition, verify that all four tires are the correct size for the installed rims, and confirm proper inflation. It is also wise to check for any rubbing at full steering lock, especially if the SUV has larger wheels or has seen previous suspension or wheel changes.
A road-ready inspection should also include alignment condition, valve stems, and general suspension health. Tires can only perform as intended when the surrounding hardware is in good order, so a quick review of tread seating, air retention, and clearances helps make sure the new set is ready for normal driving rather than just mounted.
How often should tires on a 2018 Audi Trucks Q7 be inspected?
Tires on a 2018 Audi Trucks Q7 should be inspected regularly, not just when tread looks low. A monthly check of pressure and condition is a sensible routine, along with a closer inspection before longer trips. Look for uneven wear, cuts, bulges, sidewall damage, or signs that one tire is losing air faster than the others.
A consistent inspection routine matters even more on a Q7 that sees seasonal use or sits for stretches between drives. Tire condition can change with age, storage, and temperature swings, so keeping an eye on pressure, tread wear pattern, and overall condition helps catch fitment or maintenance issues before they affect road behavior.
