The 2019 Mercedes-Benz Trucks G63 AMG blends traditional G-Class shape with modern AMG performance, giving this hand-built luxury off-roader a very different character from earlier utilitarian G-Wagens. Tire choice matters here because the G63 AMG uses three modern radial fitments—275/50R20, 285/45R21, and 295/40R22—across three different wheel diameters. That means the first step is confirming which wheel package is actually on the vehicle before comparing tires. Once that is settled, the decision shifts to overall tire character, road-use priorities, and maintaining the right look and proportions for a high-performance G-Class that may also have seen wheel or suspension changes over time.
Which Tire Size Is Right for The 2019 Mercedes-Benz Trucks G63 AMG
The 2019 Mercedes-Benz Trucks G63 AMG uses three primary tire sizes, and each one corresponds to a different wheel diameter. The Base model can be equipped with 275/50R20, 285/45R21, or 295/40R22, so the first thing to confirm is the wheel size currently on the vehicle. Once that is clear, the real decision is choosing the right radial tire within that exact fitment and checking overall compatibility if the truck has been modified.
275/50R20 is a metric radial size where 275 identifies the nominal section width in millimeters, 50 is the aspect ratio, R designates radial construction, and 20 is the wheel diameter in inches. On the 2019 Mercedes-Benz Trucks G63 AMG, this size represents the 20-inch wheel fitment and keeps the truck in a modern radial configuration. Its dimensions place it in the larger SUV performance category rather than a vintage sizing system. This is the size to evaluate if the vehicle is riding on 20-inch wheels and the goal is to stay with the proper diameter before comparing tread design and use case.
285/45R21 is a metric radial size with a 285-millimeter nominal section width, a 45-series profile, radial construction, and a 21-inch rim diameter. For the 2019 Mercedes-Benz Trucks G63 AMG, it serves as the 21-inch fitment and sits between the 20-inch and 22-inch wheel packages in overall presentation. The lower profile compared with a 50-series tire gives this size a distinct fitment identity tied to the wheel diameter. It should be considered only when the truck is already equipped with 21-inch wheels or when the complete wheel-and-tire setup is being verified as a matched package.
295/40R22 is a metric radial size that uses a 295-millimeter nominal section width, a 40-series profile, radial construction, and a 22-inch wheel diameter. On the 2019 Mercedes-Benz Trucks G63 AMG, this is the 22-inch fitment and the widest of the three primary sizes used here. It combines a large wheel diameter with a shorter sidewall profile, so wheel condition and exact vehicle setup become especially important when replacing tires. This size belongs on G63 AMG examples already running 22-inch wheels, not as a casual substitute for the other primary fitments.
Sub-model fitment is straightforward here because the covered G63 AMG Base configuration uses the same three primary tire sizes found at the model level. Even so, checking the actual wheel package still matters, since each size belongs to a different rim diameter.
1
2019 Mercedes-Benz Trucks G63 AMG Base
The 2019 Mercedes-Benz Trucks G63 AMG Base can use 275/50R20, 285/45R21, or 295/40R22, all in radial construction. That makes wheel confirmation the key step before tire selection, followed by checking for any aftermarket wheel, suspension, or stance changes that could affect clearance.
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
Owners shopping tires for a 2019 Mercedes-Benz Trucks G63 AMG usually need to confirm the wheel diameter first, then sort through fitment, radial sizing, appearance, and maintenance questions. These FAQs focus on the three primary sizes, wheel compatibility, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2019 Mercedes-Benz Trucks G63 AMG?
The 2019 Mercedes-Benz Trucks G63 AMG uses three primary tire sizes: 275/50R20, 285/45R21, and 295/40R22. All three are radial fitments, and each one matches a different wheel diameter, so they are not interchangeable as primary sizes without the correct corresponding wheel.
The practical first step is to confirm whether the vehicle has 20-inch, 21-inch, or 22-inch wheels. Many G-Class vehicles are changed over time with alternate wheel packages, so relying on appearance alone can lead to the wrong choice. Once the wheel diameter is confirmed, compare the exact tire size already on the truck and inspect clearance if the suspension or wheel setup has been altered.
What size rim does a 2019 Mercedes-Benz Trucks G63 AMG use?
A 2019 Mercedes-Benz Trucks G63 AMG can use 20-inch, 21-inch, or 22-inch rims, depending on which of its three primary tire sizes is on the vehicle. The matching combinations are 275/50R20 on a 20-inch rim, 285/45R21 on a 21-inch rim, and 295/40R22 on a 22-inch rim.
Wheel diameter needs to be confirmed before shopping for tires because the three sizes are tied directly to those rim diameters. It is also worth checking the actual wheel markings rather than assuming the wheel size from the tire alone, especially if the truck has aftermarket wheels. Width, offset, and brake-clearance considerations can matter as much as diameter on a high-performance SUV.
Why does the 2019 Mercedes-Benz Trucks G63 AMG have more than one tire size?
The 2019 Mercedes-Benz Trucks G63 AMG has more than one tire size because it can be equipped with different wheel diameters. Its three primary fitments—275/50R20, 285/45R21, and 295/40R22—reflect different wheel-and-tire packages rather than one universal size used across every example.
That means the right choice depends on the wheel setup currently on the truck, not just the model name. A G63 AMG wearing 20-inch wheels needs a different size than one on 21s or 22s. Checking the actual wheels, reading the current tire sidewall, and looking for past modifications will usually settle the question before comparing tire models or deciding whether to stay with the present setup.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 Mercedes-Benz Trucks G63 AMG?
Start with the exact primary size already matched to the vehicle’s wheel diameter: 275/50R20, 285/45R21, or 295/40R22. Since all three fitments are radial, the main selection factors are staying with the correct size, confirming wheel compatibility, and choosing a tire suited to how the G63 AMG is actually driven.
A daily-driven example may call for different priorities than a lightly used collector SUV or a truck with appearance-focused wheel upgrades. Sidewall profile, overall stance, and clearance can all change when wheel packages have been altered. It is also smart to compare the condition of suspension components and alignment settings, since a worn or modified setup can affect how even the next set of tires wears.
How do I choose between the available tire sizes for a 2019 Mercedes-Benz Trucks G63 AMG?
The three available sizes are not a matter of preference alone, because each one belongs to a different wheel diameter. A 2019 Mercedes-Benz Trucks G63 AMG on 20-inch wheels uses 275/50R20, a truck on 21-inch wheels uses 285/45R21, and a truck on 22-inch wheels uses 295/40R22.
Selection really begins with the wheels already on the vehicle. Once that is confirmed, look at how the truck is used and whether the current setup is stock in size or part of a customized package. A vehicle with changed wheels, altered ride height, or body modifications should be measured carefully so the next tire maintains proper clearance and does not create steering or rubbing issues.
What rim-fitment details should I compare when choosing 2019 Mercedes-Benz Trucks G63 AMG tires?
Rim diameter is the first detail to compare, because the G63 AMG uses three sizes tied to 20-inch, 21-inch, and 22-inch wheels. After diameter, the next important checks are wheel width, offset, and the actual tire size already mounted, since those details affect how properly a replacement tire seats and clears the vehicle.
This matters even more on a vehicle that may have aftermarket wheels or appearance upgrades. A tire can share the same nominal size and still create issues if the wheel dimensions are not compatible with the intended fitment. Reading the wheel markings, comparing the current setup side to side, and checking turning and suspension clearance help avoid replacing tires based on size code alone.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Mercedes-Benz Trucks G63 AMG?
Yes, modifications can affect tire fitment on a 2019 Mercedes-Benz Trucks G63 AMG. Wheel changes, suspension lowering or lifting, spacers, alignment changes, and body trim alterations can all influence whether 275/50R20, 285/45R21, or 295/40R22 clears properly under steering and suspension movement.
That is why it helps to inspect the truck as it sits today rather than assuming it still matches a standard wheel package. Check wheel diameter and width, look for signs of rubbing on liners or suspension parts, and confirm that front and rear clearances remain consistent. A modified G-Class may need closer measurement before replacing tires, even when the sidewall size appears familiar.
What should I inspect before driving a 2019 Mercedes-Benz Trucks G63 AMG on new tires?
Before driving a 2019 Mercedes-Benz Trucks G63 AMG on new tires, inspect wheel condition, valve stems, lug hardware, and basic alignment-related wear points. It is also wise to verify that the installed tire size matches the wheel diameter and to make sure there is no contact with fenders, suspension components, or brake hardware.
A short initial check after installation can prevent problems from becoming expensive or unsafe. Watch for vibration, uneven steering feel, or rubbing at full lock and over bumps. Tire pressure should be set appropriately for the setup being used, and the tires should be rechecked after the first drives for air retention and seating. On a heavy, high-performance SUV, small fitment issues usually reveal themselves quickly.
What should I check before a longer drive in a 2019 Mercedes-Benz Trucks G63 AMG?
Before a longer drive, make sure the 2019 Mercedes-Benz Trucks G63 AMG has the correct tire size for its wheel package and inspect each tire for cuts, bulges, punctures, irregular wear, and visible sidewall damage. Tread condition and air pressure should also be checked, especially if the vehicle spends long periods parked between outings.
Longer trips put more stress on tires that may have aged in storage or developed slow air loss. It also helps to look over the spare arrangement if the vehicle carries one and to check that the wheels are free of cracks or impact damage. A quick walk-around after the first miles of the trip can catch heat-related issues, vibration, or clearance problems before they worsen.
