Mercedes-Benz Trucks GLS63 AMG Tires

Mercedes-Benz Trucks GLS63 AMG sits at the modern high-performance end of the full-size luxury SUV world, combining AMG power with a large, heavy platform that places real demands on its tires. Across the 2017 to 2026 span covered here, Mercedes-Benz Trucks GLS63 AMG moved through several wheel and tire packages rather than staying with one simple fitment. That makes selection less straightforward than matching a year alone, because this model group uses multiple tire sizes and multiple rim diameters depending on the configuration. The first check on any Mercedes-Benz Trucks GLS63 AMG should be the wheel diameter already on the vehicle, then the front and rear size pairing if it uses a staggered setup.

Mercedes-Benz Trucks GLS63 AMG Tire Size Guide

Mercedes-Benz Trucks GLS63 AMG changed rim diameters during production, moving across 21-inch, 22-inch, and 23-inch wheel packages, with the first change appearing in 2018. Across 2017 to 2026, this model group uses 8 distinct tire sizes. Every size listed here uses modern metric radial sizing, so the section width is given in millimeters, the aspect ratio is the sidewall height as a percentage of width, and the final number is the rim diameter in inches.

295/40R212017-2019Metric radial

295/40R21 fits Mercedes-Benz Trucks GLS63 AMG models in 2017 through 2019. The code indicates a 295 mm section width, a 40-series sidewall, radial construction, and a 21-inch rim diameter. Choose this size for the 21-inch wheel package used in those years, and confirm whether the vehicle carries a square setup or a staggered pairing before selecting a tire.

285/40R222018-2019Metric radial

285/40R22 applies to Mercedes-Benz Trucks GLS63 AMG in 2018 and 2019. The code indicates a 285 mm section width, a 40-series sidewall, radial construction, and a 22-inch rim diameter. Choose this size only for the 22-inch wheel package, and verify whether it is paired with a wider rear tire on the same vehicle.

285/45R222021-2026Metric radial

285/45R22 is used on Mercedes-Benz Trucks GLS63 AMG from 2021 through 2026. The code indicates a 285 mm section width, a 45-series sidewall, radial construction, and a 22-inch rim diameter. Choose this size for the appropriate 22-inch package and match it to the correct companion rear size if the vehicle is staggered.

325/40R222021-2026Metric radial

325/40R22 is listed for Mercedes-Benz Trucks GLS63 AMG from 2021 through 2026. The code indicates a 325 mm section width, a 40-series sidewall, radial construction, and a 22-inch rim diameter. Choose this size only where the vehicle is equipped for the wider 22-inch rear fitment, since it is substantially broader than the corresponding front size.

285/40R232021-2026Metric radial

285/40R23 fits Mercedes-Benz Trucks GLS63 AMG models from 2021 through 2026. The code indicates a 285 mm section width, a 40-series sidewall, radial construction, and a 23-inch rim diameter. Choose this size only for the 23-inch front wheel package and confirm that the rear axle uses the matching 23-inch companion size.

325/35R232021-2026Metric radial

325/35R23 applies to Mercedes-Benz Trucks GLS63 AMG from 2021 through 2026. The code indicates a 325 mm section width, a 35-series sidewall, radial construction, and a 23-inch rim diameter. Choose this size for the extra-wide 23-inch rear position where fitted, and do not substitute it onto a 21-inch or 22-inch wheel.

275/50R212021-2026Metric radial

275/50R21 is used on Mercedes-Benz Trucks GLS63 AMG from 2021 through 2026. The code indicates a 275 mm section width, a 50-series sidewall, radial construction, and a 21-inch rim diameter. Choose this size for the 21-inch front fitment used on later models and pair it with the matching wider rear size where required.

315/45R212021-2026Metric radial

315/45R21 is listed for Mercedes-Benz Trucks GLS63 AMG from 2021 through 2026. The code indicates a 315 mm section width, a 45-series sidewall, radial construction, and a 21-inch rim diameter. Choose this size only when the vehicle uses the wider 21-inch rear fitment, since it belongs to a staggered arrangement rather than a same-size set at all four corners.

Mercedes-Benz Trucks GLS63 AMG buyers looking at 2021 through 2026 models need to identify the specific configuration before selecting a size, because those years include 21-inch, 22-inch, and 23-inch rim-diameter splits.

Mercedes-Benz Trucks GLS63 AMG Tires by Year

Mercedes-Benz Trucks GLS63 AMG production changed from 21-inch to 22-inch wheels in 2018, and later models also add 23-inch wheel packages, so the first step is confirming the rim diameter on the vehicle. In 2021, 2022, 2023, 2024, 2025, and 2026, more than two sizes are listed because the model group includes multiple wheel packages and staggered front-to-rear combinations. Use the year listing to narrow the range, then match the exact front and rear sizes already fitted to the specific Mercedes-Benz Trucks GLS63 AMG.

Frequently Asked Questions

The FAQ below focuses on the real fitment questions that come up with Mercedes-Benz Trucks GLS63 AMG, especially the move across 21-inch, 22-inch, and 23-inch wheel packages and the staggered front-and-rear size combinations used in later years.

Size Basics & Fitment

Mercedes-Benz Trucks GLS63 AMG uses 295/40R21 for 2017 to 2019, with 285/40R22 also appearing in 2018 and 2019. From 2021 to 2026, the listed sizes are 275/50R21, 315/45R21, 285/45R22, 325/40R22, 285/40R23, and 325/35R23. Those sizes span 21-inch, 22-inch, and 23-inch rim diameters, and several later-year combinations are clearly staggered, with a narrower front tire and a wider rear tire.

That means a year alone does not always identify the right tire for Mercedes-Benz Trucks GLS63 AMG. Start by confirming the wheel diameter on the vehicle, then check whether the front and rear sizes match or whether the SUV carries a staggered setup. Reading the current tire sidewalls and verifying the wheel diameter will usually narrow the choice quickly.

Mercedes-Benz Trucks GLS63 AMG has 6 sizes listed in 2021 because that model year includes multiple wheel-package combinations rather than one universal fitment. The 2021 range includes 21-inch sizes, 22-inch sizes, and 23-inch sizes, and each package uses a front-and-rear pairing with different widths. That is a rim-diameter split and a staggered-width split at the same time.

A 2021 Mercedes-Benz Trucks GLS63 AMG owner should identify the exact wheel package first, then confirm which sizes are mounted on the front axle and rear axle. The easiest mistake is selecting one listed size without realizing it belongs to only one end of the vehicle or to a different wheel diameter package altogether.

Mercedes-Benz Trucks GLS63 AMG uses 21-inch, 22-inch, and 23-inch rim diameters across the years listed here. The earliest fitment is 21-inch in 2017, 22-inch appears in 2018, and the 2021 to 2026 range includes 21-inch, 22-inch, and 23-inch wheel packages. The rim diameter is the last number in each metric tire size, so R21, R22, and R23 directly identify the wheel diameter.

Because Mercedes-Benz Trucks GLS63 AMG changed wheel diameters during production, wheel size is the most important fitment check before looking at brand or tread. Confirm the actual wheel diameter on the vehicle itself, then match the exact tire size fitted to each axle. That step prevents confusion between similar front widths that belong to entirely different wheels.

Buying the Right Tire

A 2023 Mercedes-Benz Trucks GLS63 AMG can use 21-inch, 22-inch, or 23-inch wheel-package combinations, so the correct size depends on the specific configuration. The listed 2023 sizes are 275/50R21, 315/45R21, 285/45R22, 325/40R22, 285/40R23, and 325/35R23. Those are not interchangeable across wheel diameters, and they also represent staggered front and rear placements.

Check all four tires on the vehicle, not just one corner, because Mercedes-Benz Trucks GLS63 AMG commonly uses different widths front and rear. Confirm the wheel diameter first, then note the front size and rear size separately. If the vehicle has had wheel changes at some point, compare what is installed now with original vehicle records before replacing anything.

Maintenance & Longevity

Mercedes-Benz Trucks GLS63 AMG is a heavy, high-performance SUV, so storage conditions matter if the tires will sit for long periods. Keep the vehicle in a cool, dry, dark space away from direct sunlight, ozone sources, and large temperature swings. Clean tires before storage and maintain inflation at the vehicle’s specified pressures so the sidewalls are not left under load in a partially deflated state.

If Mercedes-Benz Trucks GLS63 AMG will be parked for months, move it occasionally or use methods that reduce prolonged flat-spotting on one contact patch. Avoid storing it on damp ground or bare soil. A quick visual check of sidewalls and tread blocks before and after storage helps catch weathering, cracking, or impact damage early.

Tires on a Mercedes-Benz Trucks GLS63 AMG should be inspected regularly even when tread looks healthy, because this model uses wide, low-profile performance sizes that can hide damage from potholes, curb strikes, or underinflation. A monthly visual inspection is a sensible routine, with an additional check before longer drives. Look for cuts, bulges, irregular shoulder wear, and signs that one axle is wearing faster than the other.

Mercedes-Benz Trucks GLS63 AMG owners should also watch for uneven wear that may point to alignment issues, especially on staggered setups where front and rear tires cannot simply be rotated in the same way as a square set. Checking pressure when tires are cold is just as important as checking tread depth. Catching a problem early can save a wheel as well as a tire.

Tires on a Mercedes-Benz Trucks GLS63 AMG should be replaced when age, cracking, impact damage, or internal deterioration become concerns, even if the tread still appears usable. Collector thinking does not apply here the way it does with period cars; these are modern high-load, high-speed radial sizes that depend on sound structure as much as tread depth. Any bulge, exposed cord, vibration after impact, or serious weather checking is reason for immediate evaluation.

Mercedes-Benz Trucks GLS63 AMG puts substantial load into its tires, so age-related condition matters as much as mileage. Check the DOT date codes and inspect the full sidewall area, including the inner side if possible. If the SUV sees infrequent use, replacement often comes from time and condition rather than worn-out tread.

Safety & Road Use

Mercedes-Benz Trucks GLS63 AMG can be driven safely on public roads when the tires are the correct size for the wheel, in sound condition, properly inflated, and matched correctly front to rear. The listed sizes are modern radial fitments intended for modern road use, but safety depends on using the exact wheel diameter and proper axle placement. A 21-inch, 22-inch, or 23-inch mismatch is not a minor variation.

Before regular road use, inspect the current tires for age, damage, and uneven wear, then confirm that the front and rear sizes correspond to the vehicle’s wheel package. Mercedes-Benz Trucks GLS63 AMG is not forgiving of weak tire condition because of its performance capability and weight. Good tires, correct pressures, and proper alignment all matter here.

Before driving a Mercedes-Benz Trucks GLS63 AMG, check cold inflation pressure, sidewall condition, tread condition, and the exact size mounted at each axle. On later models especially, make sure the front tires and rear tires are the correct paired sizes for the wheel package in use. Also inspect for impact damage on the wheel lips, because low-profile tires on large-diameter wheels are more exposed to curb and pothole damage.

A short walk-around can prevent the most common problems. Look for warning signs such as one tire sitting lower than the others, fresh scrapes, or unusual inner-edge wear. If Mercedes-Benz Trucks GLS63 AMG has recently had wheel or suspension work, a pressure and alignment check before a longer drive is worthwhile.

The appropriate speed for a Mercedes-Benz Trucks GLS63 AMG depends on the specific tire fitted, its condition, and the manufacturer’s service description for that exact tire. Even with modern radial sizing, age, repairs, underinflation, or impact damage can reduce the practical safety margin well below what the vehicle itself is capable of. Tire condition always governs real-world use more than the badge on the tailgate.

Mercedes-Benz Trucks GLS63 AMG owners should treat tire health as the limiting factor and avoid assuming that every replacement tire supports the same use. Maintain proper pressures, keep axle pairings correct, and inspect the tires carefully if the vehicle has spent time parked or has seen hard urban use. If there is any doubt about age or condition, moderate driving is the prudent approach until the tires are evaluated.