The 2019 Mercedes-Benz AMG GT 63 S sits in the modern super-sedan class, blending AMG performance with four-door practicality and a very aggressive staggered tire setup. That combination makes tire selection less about a single all-purpose size and more about matching the exact front and rear wheel package on the car. This model uses radial tires in four fitment positions: 265/40R20 and 295/35R20 with the 20-inch setup, or 275/35R21 and 315/30R21 with the 21-inch setup. The decision centers on confirming wheel diameter first, then choosing the right tire within the proper front or rear size for appearance, handling balance, and real-world road use.
Which Tire Size Is Right for The 2019 Mercedes-Benz AMG GT 63 S
The 2019 Mercedes-Benz AMG GT 63 S uses four primary tire sizes, and they are split by both axle position and wheel diameter. Front sizes are 265/40R20 or 275/35R21, while rear sizes are 295/35R20 or 315/30R21, so the first step is confirming whether the car is on the 20-inch or 21-inch wheel package before selecting a tire.
265/40R20 is a modern metric radial size in which 265 identifies nominal section width in millimeters, 40 is the aspect ratio, R denotes radial construction, and 20 is the rim diameter in inches. On the 2019 Mercedes-Benz AMG GT 63 S, this is a front fitment tied to the 20-inch wheel setup rather than a universal size for every corner. Its role is to preserve the intended staggered relationship with the matching rear tire. Buyers should confirm front wheel diameter and make sure the car has not been changed to a different wheel package before choosing this size.
275/35R21 follows the same metric radial sizing convention, with a 275-millimeter nominal width, a 35-series profile, radial construction, and a 21-inch rim diameter. For the 2019 Mercedes-Benz AMG GT 63 S, this is the front size used with the 21-inch wheel package, so it belongs to a specific front-and-rear combination. That makes wheel confirmation especially important, since the car also appears with a separate 20-inch front size. This size should be evaluated as part of the complete 21-inch setup rather than as a stand-alone substitute.
295/35R20 is a metric radial rear size, using a 295-millimeter nominal section width, a 35-series profile, and a 20-inch rim diameter. On the 2019 Mercedes-Benz AMG GT 63 S, it serves the rear position on the 20-inch staggered setup and should be paired with the matching 20-inch front fitment. Nitto offers this size in the NT555 G2 series with a Blackwall sidewall, giving buyers at least one clearly performance-oriented rear-tire option. The key is matching this size to the correct rear wheel package and maintaining the intended front-to-rear fitment balance.
315/30R21 is a wide metric radial rear size with a 315-millimeter nominal width, a 30-series profile, and a 21-inch rim diameter. For the 2019 Mercedes-Benz AMG GT 63 S, this size belongs to the rear of the 21-inch staggered arrangement and is separate from the 20-inch rear setup. Its low-profile format reflects the larger-diameter wheel package and should be considered alongside the matching 21-inch front tire, not by itself. Checking the actual rear wheel diameter on the car is essential before moving forward with this size.
Fitment on the 2019 Mercedes-Benz AMG GT 63 S is straightforward in one sense and very specific in another: the front and rear positions use different sizes. Checking whether you are selecting for the Base Front or Base Rear position matters first, and wheel diameter matters immediately after that.
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2019 Mercedes-Benz AMG GT 63 S Base Front
The Base Front position uses one of two radial tire sizes depending on whether the car is equipped with 20-inch or 21-inch front wheels. Tire selection starts with confirming the front wheel diameter, then choosing the matching front size that belongs with the complete staggered setup.
The Base Rear position also has two radial tire sizes, again tied to either the 20-inch or 21-inch wheel package. Rear-tire selection should stay matched to the corresponding front setup so the car keeps the intended staggered fitment and wheel-diameter relationship.
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 2019 Mercedes-Benz AMG GT 63 S Tires for Sale
Available product choices for the 2019 Mercedes-Benz AMG GT 63 S currently include a 295/35R20 rear radial from Nitto in the NT555 G2 series with a Blackwall sidewall. That makes wheel-package confirmation especially important before comparing product details.
Owners of a 2019 Mercedes-Benz AMG GT 63 S usually need answers about staggered tire sizing, 20-inch versus 21-inch wheel fitment, front-to-rear matching, and how to evaluate available tire options before road use.
Tire Size & Fitment
What tire size fits a 2019 Mercedes-Benz AMG GT 63 S?
The 2019 Mercedes-Benz AMG GT 63 S uses a staggered radial setup with four primary sizes: 265/40R20 and 295/35R20 for the 20-inch package, or 275/35R21 and 315/30R21 for the 21-inch package. The front and rear do not use the same size, and the two wheel-diameter packages should not be mixed casually.
The practical first step is confirming the actual wheel diameter on the car and then identifying whether you are selecting a front or rear tire. A car that has been changed from its original wheel setup, or one wearing aftermarket wheels, should be checked carefully so the tire size matches the wheel and the complete staggered combination.
What size rim does a 2019 Mercedes-Benz AMG GT 63 S use?
The 2019 Mercedes-Benz AMG GT 63 S uses either 20-inch or 21-inch rims, depending on the tire and wheel package on the car. The 265/40R20 and 295/35R20 sizes mount on 20-inch wheels, while the 275/35R21 and 315/30R21 sizes mount on 21-inch wheels.
That means rim diameter has to be confirmed before buying tires, especially since both front and rear sizes change with the wheel package. Looking at the sidewall of the tire already on the car, or measuring the wheel directly, is the safest way to avoid choosing a tire that belongs to the other setup.
Why does the 2019 Mercedes-Benz AMG GT 63 S have more than one tire size?
The 2019 Mercedes-Benz AMG GT 63 S has more than one tire size because it uses a staggered setup, with one size for the front axle and a larger size for the rear axle. It also appears with either a 20-inch or 21-inch wheel package, which creates two separate front-and-rear size combinations.
That arrangement means the correct choice depends on both axle position and wheel diameter, not simply the vehicle name. A front tire cannot be chosen from the rear sizes, and a 20-inch tire should not be treated as interchangeable with a 21-inch tire just because both belong to the same model year and trim.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 Mercedes-Benz AMG GT 63 S?
Start with the basics that matter most on this car: front versus rear position, 20-inch versus 21-inch wheel diameter, and the exact metric size required for that corner. Since the AMG GT 63 S uses a staggered radial fitment, the right tire is the one that matches the vehicle's actual wheel package and axle location.
After size is confirmed, compare details such as tire series, sidewall style, construction, and any available load or weight specifications. Cars with aftermarket wheels, suspension changes, or nonstandard alignments deserve extra attention, because even a correct nominal size still needs to suit the wheel and the available clearance.
What sidewall styles are available for 2019 Mercedes-Benz AMG GT 63 S tires?
Current product availability for the 2019 Mercedes-Benz AMG GT 63 S includes a Blackwall sidewall in 295/35R20. That sidewall style suits the modern, performance-oriented look of the car and matches the contemporary character of its metric radial sizing.
Sidewall style should still be considered alongside the correct axle position and wheel diameter, since appearance comes after fitment. On a staggered setup like this one, the better approach is to choose the correct size first, then compare sidewall presentation within the applicable tire options for that specific corner.
What tire series are available for the 2019 Mercedes-Benz AMG GT 63 S?
One currently available tire series for the 2019 Mercedes-Benz AMG GT 63 S is the Nitto NT555 G2 in 295/35R20. That places it in the rear fitment for the 20-inch wheel package rather than as a universal solution for every AMG GT 63 S tire position.
Series choice matters after confirming the size and wheel package because tire lines can differ in character, intended use, and appearance. On this car, it is especially important to avoid treating a rear 20-inch product as if it also answers the front fitment or the separate 21-inch package.
Restoration & Appearance
How does tire construction affect the appearance of a 2019 Mercedes-Benz AMG GT 63 S?
On the 2019 Mercedes-Benz AMG GT 63 S, tire construction is straightforward because the primary fitments are radial across all four sizes. That keeps the visual character modern, with low-profile metric sizing and a staggered stance that suits the car's contemporary AMG design language.
Appearance is influenced more by choosing the correct wheel package and sidewall style than by switching between bias-ply and radial, since bias-ply is not the primary fitment here. Keeping the right front-and-rear size relationship does more for the car's visual balance than trying to force an unrelated size onto the wheels.
Does correct tire fitment matter for a 2019 Mercedes-Benz AMG GT 63 S restoration or preservation project?
Correct tire fitment matters on a preserved 2019 Mercedes-Benz AMG GT 63 S because the car's look and stance depend on the proper staggered front-and-rear sizing. The 20-inch and 21-inch setups create distinct combinations, so maintaining the correct pairing is part of keeping the vehicle visually coherent.
Preservation-minded owners should document the wheel package actually on the car before replacing tires, especially if the vehicle has changed hands or worn alternate wheels at some point. Matching the axle position, wheel diameter, and sidewall presentation helps retain the intended modern performance appearance without guessing across incompatible sizes.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Mercedes-Benz AMG GT 63 S?
Yes, modifications can affect tire fitment on a 2019 Mercedes-Benz AMG GT 63 S even when the vehicle is using one of the recognized sizes. Aftermarket wheels, offset changes, suspension lowering, alignment changes, or body modifications can all change how much room the tire has at the fender, inner wheelhouse, and steering components.
That is especially important on a low-profile, staggered setup where front and rear sizes already differ. Any modified car should have wheel diameter, wheel width, and clearance checked at full steering lock and through suspension travel before a replacement tire is chosen simply by matching the sidewall size.
What should I inspect before driving a 2019 Mercedes-Benz AMG GT 63 S on new tires?
Before driving a 2019 Mercedes-Benz AMG GT 63 S on new tires, inspect inflation pressure, bead seating, visible sidewall condition, tread surface, and wheel condition. It is also wise to confirm that each tire is mounted in the correct front or rear position and that the wheel diameter matches the tire's stated size.
A short initial check drive should be followed by another visual inspection for air loss, rubbing, or uneven seating. On a high-performance staggered setup, small mistakes in placement or wheel matching can create larger problems than they would on a simple square setup, so careful verification is time well spent.
How often should tires on a 2019 Mercedes-Benz AMG GT 63 S be inspected?
Tires on a 2019 Mercedes-Benz AMG GT 63 S should be inspected regularly, with visual checks before routine driving and a more careful inspection after longer storage or before a longer trip. Key points include pressure retention, tread wear, cuts, punctures, bulges, and any signs of sidewall cracking or impact damage.
Collector or low-mileage use does not eliminate the need for inspection, because tires can age even when tread looks good. Cars that sit for extended periods also deserve attention to flat spotting and gradual air loss, especially when running wide rear tires and low-profile front tires on different wheel diameters.
