The 2019 Mercedes-Benz Trucks GLC300 sits in the modern luxury crossover era, where everyday drivability, upscale road manners, and sharp styling all matter as much as utility. On this exact model, tire selection is less about vintage-style construction and more about matching the correct metric radial size to the right wheel and body configuration. The GLC300 uses 235/60R18, 235/55R19, 255/45R20, and, on the coupe rear application, 285/40R20. That means the real choice starts with confirming the exact sub-model and wheel setup, then comparing available series and sidewall treatments where product options exist. For road use, appearance, and handling balance, exact fitment comes first.
Which Tire Size Is Right for The 2019 Mercedes-Benz Trucks GLC300
The 2019 Mercedes-Benz Trucks GLC300 uses four primary tire sizes, and the correct choice depends on the exact sub-model and wheel diameter. Eighteen-inch, 19-inch, and 20-inch applications are all present, and the coupe setup introduces a staggered 20-inch fitment with different front and rear sizes. Before selecting a tire, confirm whether the vehicle is a Base model, 4Matic, or coupe configuration, then verify the actual wheel diameter on the vehicle.
235/55R19 is a metric radial size with a 235-millimeter nominal section width, a 55-series profile, radial construction, and a 19-inch rim diameter. On the 2019 Mercedes-Benz Trucks GLC300, this size is one of the core fitments and appears across more than one sub-model, making it a common reference point for owners with 19-inch wheels. Its practical role is straightforward: it belongs on vehicles equipped for the 19-inch setup, so the key step is confirming the wheel diameter and exact configuration before comparing tread design, road-use priorities, or replacement brand options.
235/60R18 is a metric radial size that combines a 235-millimeter nominal section width with a 60-series profile on an 18-inch rim. This is a primary GLC300 fitment for the standard 18-inch wheel application, and it serves buyers who need to stay with that specific wheel diameter rather than moving into a lower-profile 19-inch or 20-inch tire. The size itself points to the decision: match the tire to the existing 18-inch wheel setup, then evaluate replacement options with attention to wheel condition, intended driving use, and any changes made since the vehicle left stock form.
255/45R20 is a metric radial size with a 255-millimeter nominal section width, a 45-series profile, radial construction, and a 20-inch rim diameter. On the 2019 Mercedes-Benz Trucks GLC300, it appears on 20-inch applications and also serves as the front size in the staggered coupe setup. Available products in this size include BFGoodrich, Nitto, and Pro-Trac options, along with Blackwall, raised white letter, and Redline sidewall treatments across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, Street Pro III, and NT555 G2. It is the size to evaluate when the vehicle already wears 20-inch front or non-staggered 20-inch wheels.
285/40R20 is a metric radial size that uses a wider 285-millimeter nominal section width with a 40-series profile on a 20-inch rim. On the 2019 Mercedes-Benz Trucks GLC300, this size is tied to the rear of the 4Matic Coupe staggered arrangement rather than the full model range, so it should not be treated as a universal GLC300 fitment. Its main significance is positional fitment: buyers considering this size should confirm that the vehicle has the coupe rear setup and that the rear wheel width and clearance match the intended replacement tire.
Sub-model fitment matters on the 2019 Mercedes-Benz Trucks GLC300 because wheel diameter and tire size vary across the range. Base and 4Matic models can share several sizes, while the coupe applications split into a dedicated single-size setup or a staggered front-and-rear arrangement that must be matched carefully.
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2019 Mercedes-Benz Trucks GLC300 4Matic
The 2019 Mercedes-Benz Trucks GLC300 4Matic uses multiple radial tire sizes, so the correct choice depends on which wheel package is on the vehicle. Tire selection starts with confirming whether it has the 18-inch, 19-inch, or 20-inch setup, then matching the replacement to that wheel diameter and overall configuration.
The 2019 Mercedes-Benz Trucks GLC300 4Matic Coupe appears with a 235/55R19 radial fitment in this configuration. That makes wheel confirmation especially important, since coupe-related entries also include staggered 20-inch front and rear sizes that should not be mixed into a 19-inch replacement decision.
2019 Mercedes-Benz Trucks GLC300 4Matic Coupe Front
The 2019 Mercedes-Benz Trucks GLC300 4Matic Coupe Front uses 255/45R20 as its front radial size. Front-tire selection here should stay focused on the staggered coupe arrangement, with attention to matching the correct 20-inch front position rather than assuming the rear uses the same size.
2019 Mercedes-Benz Trucks GLC300 4Matic Coupe Rear
The 2019 Mercedes-Benz Trucks GLC300 4Matic Coupe Rear uses 285/40R20 as its rear radial size. That rear-specific fitment means buyers should verify they are replacing the back tires on a staggered coupe setup, since the front application uses a different 20-inch size.
The 2019 Mercedes-Benz Trucks GLC300 Base shares the same multi-size radial fitment pattern seen on the standard non-coupe range. Choosing the right tire means identifying which wheel package the vehicle actually has, then staying within that diameter before comparing available product style or performance character.
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 Trucks GLC300 Tires for Sale
Available product choice centers on 255/45R20, where BFGoodrich, Nitto, and Pro-Trac offer multiple radial series. Buyers can compare Blackwall, raised white letter, and Redline sidewall treatments, along with differences in tire series and rim-width compatibility within the 20-inch fitment.
GLC300 owners usually need to sort out tire size by sub-model and wheel diameter first. The questions below focus on exact fitment, 20-inch product choices, sidewall treatments, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2019 Mercedes-Benz Trucks GLC300?
The 2019 Mercedes-Benz Trucks GLC300 uses 235/60R18, 235/55R19, 255/45R20, and 285/40R20, depending on the exact sub-model and wheel setup. All of these are radial sizes, but they do not apply across the model range in the same way, especially once the coupe and staggered 20-inch arrangement are involved.
The practical first step is to confirm the vehicle's actual wheel diameter and whether it is a Base model, 4Matic, or coupe configuration. On the 4Matic Coupe, front and rear fitment may differ, so using the existing tire placard, wheel markings, and current size stamping together is the safest way to sort out the correct replacement path.
What size rim does a 2019 Mercedes-Benz Trucks GLC300 use?
The 2019 Mercedes-Benz Trucks GLC300 uses 18-inch, 19-inch, and 20-inch rim diameters across its different tire fitments. The 235/60R18 size matches an 18-inch rim, 235/55R19 matches a 19-inch rim, and both 255/45R20 and 285/40R20 are built for 20-inch wheels.
Rim diameter is the first fitment check because a tire must match the wheel's actual diameter exactly. A GLC300 wearing 20-inch wheels cannot use an 18-inch or 19-inch tire, even if the overall tire height looks close on paper, so the wheel itself should be verified before comparing brands, tread styles, or sidewall treatments.
Do all 2019 Mercedes-Benz Trucks GLC300 sub-models use the same tire size?
No. The 2019 Mercedes-Benz Trucks GLC300 has sub-model variation, with Base and 4Matic versions using multiple size possibilities and coupe applications introducing their own fitment differences. The staggered 4Matic Coupe setup is the clearest example, using 255/45R20 in front and 285/40R20 in the rear.
That variation means the model name alone is not enough when ordering tires or checking replacement options. Identifying the exact sub-model, then confirming whether the vehicle has a square setup or a staggered front-and-rear arrangement, helps prevent size mismatches and keeps the selection process focused on the wheels actually installed on the vehicle.
Choosing the Right Tire
What should I consider when choosing a 255/45R20 tire for a 2019 Mercedes-Benz Trucks GLC300?
A 255/45R20 tire for the 2019 Mercedes-Benz Trucks GLC300 should first match the vehicle's 20-inch application and intended position on the vehicle. Once size is confirmed, the meaningful comparisons are construction details within the radial category, tire series, sidewall treatment, and any rim-width guidance tied to the product.
For this size, product choice includes BFGoodrich, Nitto, and Pro-Trac offerings, with Blackwall, raised white letter, and Redline appearances available. A buyer looking for a restrained modern look may lean toward Blackwall, while a more customized presentation may point toward RWL or Redline, but wheel compatibility and the vehicle's exact setup still come first.
What sidewall styles are available for 2019 Mercedes-Benz Trucks GLC300 tires?
Within the available 255/45R20 product selection for the 2019 Mercedes-Benz Trucks GLC300, sidewall styles include Blackwall, RWL, and Redline. That gives this size a meaningful appearance range, from a subdued modern look to more noticeable enthusiast-oriented sidewall treatments.
Sidewall style does not change the tire's basic size requirement, but it can strongly affect how a 20-inch GLC300 wheel package looks. Buyers choosing between these styles should make the appearance decision after confirming the correct fitment, since an attractive sidewall treatment still needs to match the vehicle's actual front, rear, and wheel-diameter requirements.
What brands offer tires for the 2019 Mercedes-Benz Trucks GLC300?
For the available 255/45R20 fitment on the 2019 Mercedes-Benz Trucks GLC300, tire options include BFGoodrich, Nitto, and Pro-Trac. Those brands cover several radial series, including g-Force Comp 2 AS, g-Force Sport Comp 2, NT555 G2, and Street Pro III.
Brand choice matters less than matching the correct size and intended use first. After that, the useful comparison points are whether the tire's series suits the kind of driving the vehicle sees, whether the sidewall style matches the desired look, and whether the wheel falls within the tire's stated rim-width compatibility where that specification is given.
Restoration & Appearance
How does tire construction affect the appearance of a restored 2019 Mercedes-Benz Trucks GLC300?
On a 2019 Mercedes-Benz Trucks GLC300, construction is simpler than on older collector vehicles because the primary fitments are radial rather than bias-ply. The appearance decision comes less from construction type and more from the wheel-and-tire package itself, especially profile, width, and visible sidewall treatment on sizes such as 255/45R20.
A restoration-oriented or carefully preserved GLC300 can still look noticeably different depending on whether it wears a plain Blackwall, a raised white letter tire, or a Redline sidewall. Keeping the correct size and position for the vehicle's actual setup preserves the intended stance more effectively than chasing a style cue that belongs to a different wheel diameter or sub-model.
Which sidewall style suits a period-style 2019 Mercedes-Benz Trucks GLC300?
A period-style 2019 Mercedes-Benz Trucks GLC300 usually leans toward a Blackwall presentation, since that keeps the look aligned with a modern luxury crossover aesthetic. In the 255/45R20 fitment, RWL and Redline options add a more customized visual statement and move the appearance away from a restrained stock-style look.
The best choice depends on the vehicle's goal. A preserved or restoration-minded GLC300 generally benefits from staying visually close to its original era, while an owner building a more personalized 20-inch package may prefer the added contrast of RWL or Redline, provided the tire still matches the correct wheel position and overall fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Mercedes-Benz Trucks GLC300?
Yes. Modifications can change tire fitment on a 2019 Mercedes-Benz Trucks GLC300 even when the replacement tire is one of the correct factory-size options. Aftermarket wheels, altered wheel widths, offset changes, suspension lowering, or body modifications can all affect how a 235/60R18, 235/55R19, 255/45R20, or 285/40R20 tire sits in the vehicle.
A GLC300 that has been changed from stock should be checked for wheel diameter, wheel width, and front-to-rear setup before new tires are selected. Clearance at full steering lock and under suspension compression matters too, especially on 20-inch applications and staggered coupe arrangements where front and rear tire sizing already differ by design.
What should I inspect before driving a 2019 Mercedes-Benz Trucks GLC300 on new tires?
Before putting a 2019 Mercedes-Benz Trucks GLC300 into regular use on new tires, inspect the wheels for damage, confirm that the installed tire sizes match the vehicle's actual setup, and check inflation carefully. It is also smart to look over the suspension and alignment condition so the new tires start life on a sound chassis.
A careful once-over should include valve stems, any signs of rubbing, and enough clearance at the front and rear for the specific wheel package on the vehicle. After the first miles of driving, rechecking pressure and looking for uneven wear or contact marks can catch a fitment or setup issue before it becomes a larger problem.
How often should tires on a 2019 Mercedes-Benz Trucks GLC300 be inspected?
Tires on a 2019 Mercedes-Benz Trucks GLC300 should be inspected regularly rather than only at replacement time. Routine checks should include pressure, tread wear, cuts, bulges, punctures, and sidewall damage, with extra attention paid to vehicles that sit for long periods or use wider 20-inch fitments.
Monthly visual checks are a sensible habit, and a closer inspection before longer drives is even better. On a staggered coupe setup, front and rear tires may wear differently because the sizes are not the same, so each axle deserves separate attention instead of assuming the whole set is aging and wearing in exactly the same way.
