The 2016 Mercedes-Benz Trucks GL450 blends full-size luxury SUV comfort with the road presence and all-weather versatility that made the GL-Class a popular choice for family touring and long-distance use. On a vehicle like this, tire selection affects not just appearance, but ride quality, wheel compatibility, and everyday drivability. The 2016 Mercedes-Benz Trucks GL450 uses radial tires, with fitments in either 275/50R20 or 275/55R19 depending on the wheel setup. That makes the key decision less about vintage-style construction and more about confirming the correct rim diameter first. Once that is established, the focus shifts to selecting the right tire within the proper size for the vehicle’s actual wheel package.
Which Tire Size Is Right for The 2016 Mercedes-Benz Trucks GL450
The 2016 Mercedes-Benz Trucks GL450 uses two primary tire sizes, and both are radial fitments. The important first step is confirming whether the vehicle is running a 19-inch or 20-inch wheel, since the two sizes are tied to different rim diameters. The GL450 4Matic can be found with either setup, so the correct choice depends on the actual wheels on the vehicle rather than the model name alone.
A 275/50R20 tire uses a 275-millimeter nominal section width, a 50-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2016 Mercedes-Benz Trucks GL450, this is one of the primary modern radial fitments and belongs on vehicles equipped with 20-inch wheels. The lower-profile side of this size, compared with the 19-inch alternative, makes wheel confirmation especially important before replacement. Choose this size when the GL450 is already set up with the matching 20-inch wheel package and the existing tire markings confirm it.
A 275/55R19 tire also uses a 275-millimeter nominal section width and radial construction, but it is designed for a 19-inch rim and uses a 55-series profile. For the 2016 Mercedes-Benz Trucks GL450, this is the alternate primary fitment for vehicles carrying the 19-inch wheel setup. Its overall dimensions are very close to the 20-inch fitment, but the rim diameter difference means the two sizes are not interchangeable without the correct wheel. This size should be selected only after verifying that the vehicle is actually fitted with 19-inch wheels.
Sub-model fitment is straightforward here, but wheel setup still matters. The GL450 4Matic uses the same two primary radial tire sizes found on the model overall, so identifying the installed rim diameter is the real key to choosing correctly.
1
2016 Mercedes-Benz Trucks GL450 4Matic
The 2016 Mercedes-Benz Trucks GL450 4Matic can use either of the two primary radial fitments, depending on whether it has 19-inch or 20-inch wheels. Tire selection starts with the actual wheel diameter on the vehicle, then moves to choosing the proper replacement tire within that matching size.
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
Tire questions for the 2016 Mercedes-Benz Trucks GL450 usually come down to confirming the correct wheel diameter, understanding the two primary radial sizes, and checking fitment details before replacement. These answers focus on size, rim compatibility, selection, and road-use readiness.
Tire Size & Fitment
What tire size fits a 2016 Mercedes-Benz Trucks GL450?
The 2016 Mercedes-Benz Trucks GL450 uses two primary tire sizes: 275/50R20 and 275/55R19. Both are radial fitments, and both are correct for this model depending on the wheel package installed on the vehicle.
The practical difference is rim diameter. A 275/50R20 tire belongs on a 20-inch wheel, while a 275/55R19 tire belongs on a 19-inch wheel. Before replacing tires, check the size molded on the current sidewall and confirm the wheel diameter on the vehicle so the new tire matches the existing setup.
What size rim does a 2016 Mercedes-Benz Trucks GL450 use?
A 2016 Mercedes-Benz Trucks GL450 can use either a 20-inch rim with 275/50R20 tires or a 19-inch rim with 275/55R19 tires. Both combinations are part of the model’s primary fitment range.
That means there is not one universal rim diameter for every GL450. Tire replacement should begin with the wheel actually on the vehicle, not with assumption alone. Matching the tire to the correct rim diameter is essential, and it is also wise to confirm the current wheel setup if the SUV has had previous tire or wheel changes.
Why does the 2016 Mercedes-Benz Trucks GL450 have more than one tire size?
The 2016 Mercedes-Benz Trucks GL450 has more than one tire size because it was fitted with different wheel diameters. One fitment uses 275/55R19 on a 19-inch rim, and the other uses 275/50R20 on a 20-inch rim.
Even though the two sizes are close in overall dimensions, they are built for different wheels. That is why the first step is identifying the actual wheel diameter on the vehicle. Once that is confirmed, the correct tire size becomes clear and the remaining decision is choosing a suitable replacement within that matching radial fitment.
Choosing the Right Tire
What should I consider when choosing a tire for a 2016 Mercedes-Benz Trucks GL450?
Start with the correct primary size for the vehicle’s wheel setup: 275/50R20 for a 20-inch rim or 275/55R19 for a 19-inch rim. Both fitments are radial, so the main selection issue is not construction type, but matching the tire to the actual wheel diameter in use.
After confirming size, compare replacement tires based on how the GL450 is driven and whether the vehicle remains in stock form. Wheel width, clearance, load needs, and intended use all matter. A careful check of the current tire markings and wheel dimensions helps prevent ordering a tire that matches the model name but not the wheel package.
How do I choose between the available tires for a 2016 Mercedes-Benz Trucks GL450?
The first choice is not between brands or styles, but between the two correct fitments for the vehicle: 275/50R20 or 275/55R19. Once the wheel diameter is confirmed, the right tire category is established and selection becomes much simpler.
From there, compare tires that match the exact size already on the GL450. Look at factors such as overall intended use, road manners, wheel compatibility, and whether the SUV has been modified from its original wheel setup. Keeping the new tire in the exact same size as the current correct fitment is usually the clearest starting point.
What rim-fitment details should I compare when choosing 2016 Mercedes-Benz Trucks GL450 tires?
The most important rim-fitment detail is diameter. A 275/50R20 tire requires a 20-inch wheel, while a 275/55R19 tire requires a 19-inch wheel. On the 2016 Mercedes-Benz Trucks GL450, choosing between those two sizes begins there.
It also helps to verify the actual wheel on the vehicle before replacement, especially if the GL450 was purchased used or has had aftermarket work. Diameter mismatches stop a tire from being mounted properly, and wheel changes can also affect clearance and overall fitment. Checking the wheel first avoids confusion between two valid but separate tire sizes.
Restoration & Appearance
Does correct tire fitment matter for a 2016 Mercedes-Benz Trucks GL450 restoration?
Yes, correct tire fitment still matters on a 2016 Mercedes-Benz Trucks GL450, even though it is a newer vehicle than most restoration-era classics. Using the proper 275/50R20 or 275/55R19 size helps preserve the intended relationship between the tire, the wheel, and the vehicle’s overall stance.
Appearance and fitment are closely tied on a luxury SUV with large wheels. A tire mounted to the wrong rim diameter is obviously incorrect, but even a casual replacement choice can change how the vehicle presents. For a restoration-minded or well-kept GL450, matching the installed wheel package is the soundest place to begin.
Which tire should I choose for a well-kept 2016 Mercedes-Benz Trucks GL450?
For a well-kept 2016 Mercedes-Benz Trucks GL450, the best starting point is the exact size already matched to the vehicle’s wheels: either 275/50R20 or 275/55R19. Both are primary radial fitments for this model, so correctness begins with preserving the proper wheel-and-tire combination.
That approach keeps the visual balance and intended fitment intact. Before replacing anything, confirm the size on the sidewall and compare it to the actual rim diameter on the SUV. On a carefully maintained GL450, staying with the correct primary size is usually the most consistent way to protect both presentation and fit.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2016 Mercedes-Benz Trucks GL450?
Yes, modifications can affect tire fitment on a 2016 Mercedes-Benz Trucks GL450. The model already uses two different primary sizes tied to two different wheel diameters, so aftermarket wheels, suspension changes, or altered ride height can complicate replacement choices even further.
A GL450 with non-stock wheels should be checked carefully before new tires are selected. Verify actual wheel diameter first, then confirm that width and clearance still suit the intended size. Steering travel, inner clearance, and fender clearance all deserve attention when the vehicle no longer matches its original wheel-and-suspension setup.
What should I inspect before driving a 2016 Mercedes-Benz Trucks GL450 on new tires?
Before driving a 2016 Mercedes-Benz Trucks GL450 on new tires, inspect the wheel diameter, tire size, inflation pressure, and the general condition of the wheels themselves. The tire should match the vehicle’s actual setup, whether that means 275/50R20 on a 20-inch rim or 275/55R19 on a 19-inch rim.
It is also smart to look over suspension condition, steering response, and visible clearance around the tire once mounted. A short, careful road test can help reveal rubbing, vibration, or air-loss concerns early. On a heavy luxury SUV, catching those issues before regular driving is an important part of safe tire replacement.
What should I check before a longer drive in a 2016 Mercedes-Benz Trucks GL450?
Before a longer drive in a 2016 Mercedes-Benz Trucks GL450, check tire pressure, tread condition, visible sidewall damage, and any signs of uneven wear. Confirm that the vehicle is running the correct size for its wheels, since this model may use either 275/50R20 or 275/55R19.
Longer trips are also a good time to inspect for cuts, bulges, or slow air loss that may not be obvious during local driving. A quick review of wheel condition and suspension feel can also help. On a vehicle that may have changed hands or been modified, that extra fitment check is especially worthwhile.
