The 2017 Mercedes-Benz CLA45 AMG sits at the sharp end of the CLA lineup, blending compact luxury packaging with the aggressive character expected from an AMG-badged performance sedan. Its tire fitment reflects that modern performance focus, with radial sizes of 235/35R19 and 235/40R18 used on this exact model. Both sizes keep a similar overall diameter while pairing the car with either an 18-inch or 19-inch wheel, so the first step is confirming which wheel setup is on the car. From there, the real choice centers on tire series, brand preference, and selecting a fitment that suits both road use and the car's current wheel and suspension setup.
Which Tire Size Is Right for The 2017 Mercedes-Benz CLA45 AMG
The 2017 Mercedes-Benz CLA45 AMG uses two primary tire sizes, and the correct one depends first on wheel diameter. Both fitments are radial and belong to the same 4Matic sub-model, but one is built for an 18-inch rim and the other for a 19-inch rim. Before choosing a tire, confirm which wheels are actually on the car, especially if it has been changed from its original wheel package.
A 235/35R19 tire uses a 235-millimeter nominal section width, a 35-series aspect ratio, radial construction, and a 19-inch rim. On the 2017 Mercedes-Benz CLA45 AMG, this is a low-profile modern performance fitment that preserves the car's sharp, contemporary tire presentation. Available choices in this size include Blackwall tires from Nitto and BFGoodrich, with series such as Nitto NT555 G2 and g-Force Phenom T/A. This size makes sense when the car is equipped with 19-inch wheels and the owner wants to stay with the correct low-profile 19-inch fitment format.
A 235/40R18 tire uses the same 235-millimeter nominal width as the 19-inch option, but with a 40-series profile and an 18-inch rim diameter. For the 2017 Mercedes-Benz CLA45 AMG, it remains a radial performance fitment while matching cars equipped with 18-inch wheels instead of 19s. Product choices include Blackwall offerings from BFGoodrich and Nitto across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, Nitto NT555 G2, and g-Force Phenom T/A. This is the size to evaluate when the car carries 18-inch wheels and you want to compare several series within that wheel package.
Fitment is straightforward here because the covered sub-model uses the same two radial tire sizes, with the difference tied to wheel diameter rather than trim variation. Checking the exact sub-model still helps confirm that you are selecting tires for the CLA45 AMG 4Matic rather than another CLA configuration.
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2017 Mercedes-Benz CLA45 AMG 4Matic
The 2017 Mercedes-Benz CLA45 AMG 4Matic uses the same two primary radial fitments found at the model level, with the choice centered on whether the car has 18-inch or 19-inch wheels. Tire selection therefore comes down to confirming the wheel setup first, then comparing brand and series options within the correct 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.
Best 2017 Mercedes-Benz CLA45 AMG Tires for Sale
Available 2017 Mercedes-Benz CLA45 AMG tires center on the two radial sizes used with its 18-inch and 19-inch wheel packages. Choices include Blackwall performance tires from BFGoodrich and Nitto across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2.
Common 2017 Mercedes-Benz CLA45 AMG tire questions usually come down to identifying the correct wheel diameter first, then comparing the right radial size, tire series, brand, and fitment details for road use and maintenance.
Tire Size & Fitment
What tire size fits a 2017 Mercedes-Benz CLA45 AMG?
The 2017 Mercedes-Benz CLA45 AMG uses two primary tire sizes: 235/35R19 and 235/40R18. Both are radial fitments, and both apply to the CLA45 AMG 4Matic configuration, so the deciding factor is not trim level so much as which wheel diameter is on the car.
The practical next step is to verify whether the car has 18-inch or 19-inch wheels before choosing a tire. A previous owner may have changed wheels, and low-profile performance tires leave less room for guessing. Matching the tire size to the actual wheel diameter is the foundation for proper selection.
What size rim does a 2017 Mercedes-Benz CLA45 AMG use?
A 2017 Mercedes-Benz CLA45 AMG uses either an 18-inch or 19-inch rim, depending on which of its two tire sizes is on the car. The 235/40R18 fitment pairs with an 18-inch wheel, while the 235/35R19 fitment pairs with a 19-inch wheel.
Checking the wheel itself matters because both tire sizes are correct for this model, but they are not interchangeable across different rim diameters. Confirm the wheel size stamped on the rim or verify the current tire size already mounted. That avoids ordering a tire that matches the car in general but not the wheel setup actually installed.
Why does the 2017 Mercedes-Benz CLA45 AMG have more than one tire size?
The 2017 Mercedes-Benz CLA45 AMG has more than one tire size because it uses two wheel-diameter fitments: 235/40R18 for 18-inch wheels and 235/35R19 for 19-inch wheels. Both sizes keep the car in a similar overall tire-diameter range while matching different wheel packages.
That means the choice is not about picking whichever size looks closest. It is about matching the tire to the wheels on the car now. Once wheel diameter is confirmed, then it becomes easier to compare available tire series, load specifications where shown, and rim-width compatibility within the correct size.
Choosing the Right Tire
What should I consider when choosing a 235/35R19 tire for a 2017 Mercedes-Benz CLA45 AMG?
For a 2017 Mercedes-Benz CLA45 AMG running 235/35R19 tires, the main considerations are confirming the 19-inch wheel setup, staying with the correct low-profile metric radial size, and comparing the available Blackwall performance options. In this size, choices include BFGoodrich and Nitto across series such as g-Force Phenom T/A and NT555 G2.
The next comparison points are the wheel width the tire supports, along with any load and weight details that matter to your intended use. Because 235/35R19 is a short-sidewall performance fitment, it is especially important to confirm that the wheel width, suspension condition, and clearance all remain appropriate for the car as it sits.
What brands offer tires for the 2017 Mercedes-Benz CLA45 AMG?
Tires for the 2017 Mercedes-Benz CLA45 AMG are available from BFGoodrich and Nitto. Across its two correct sizes, the product range includes BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, along with the Nitto NT555 G2.
Brand alone should not make the decision. Start by matching the tire to the car's actual 18-inch or 19-inch wheel setup, then compare the series offered in that size. Looking at sidewall style, rim-width compatibility, and any published load figures gives a clearer basis for selection than choosing by name alone.
What tire series are available for the 2017 Mercedes-Benz CLA45 AMG?
The 2017 Mercedes-Benz CLA45 AMG has several tire series available across its two fitments. The 18-inch size includes BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2, while the 19-inch size includes BFGoodrich g-Force Phenom T/A and Nitto NT555 G2.
Series differences matter because they shape what you can compare once the correct size is confirmed. Some owners may want the broader 18-inch selection, while others simply need the right options for an existing 19-inch wheel package. Matching the right series starts with matching the correct size, then reviewing wheel-width and spec details.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Mercedes-Benz CLA45 AMG?
A period-style approach on a 2017 Mercedes-Benz CLA45 AMG still starts with the correct modern radial size for the wheel package on the car: either 235/40R18 or 235/35R19. Since this is a late-model AMG application, the visual character comes less from vintage sidewall treatments and more from preserving the proper low-profile performance look.
Blackwall tires are the available presentation in these fitments, which suits the car's original-era design language better than trying to force a retro appearance. The better decision is usually selecting the right wheel diameter, maintaining the intended tire proportions, and choosing a series that fits the way the car will actually be driven and shown.
Does correct tire fitment matter for a 2017 Mercedes-Benz CLA45 AMG restoration?
Correct tire fitment matters on a 2017 Mercedes-Benz CLA45 AMG because the car's appearance and stance depend heavily on its low-profile radial sizes. Using 235/40R18 on an 18-inch wheel or 235/35R19 on a 19-inch wheel keeps the proportions in line with the model's intended performance-oriented look.
Appearance is only part of the issue. The wrong tire size can also change wheel compatibility and create unwanted clearance concerns, especially on a compact AMG platform. For an owner trying to return the car to a clean, proper presentation, matching the tire to the correct wheel diameter is one of the most visible details to get right.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Mercedes-Benz CLA45 AMG?
Modifications can absolutely affect tire fitment on a 2017 Mercedes-Benz CLA45 AMG. Even when the car uses one of its correct primary sizes, changes such as aftermarket wheels, altered wheel width, different offset, lowering, or suspension work can influence whether the tire still has the right relationship to the fenders and steering components.
That matters most on a low-profile setup like 235/35R19 or 235/40R18, where clearances can become tight quickly. A modified car should be checked for wheel diameter, wheel width, and available clearance at full lock and through suspension travel. Fitment that worked on a stock setup should not be assumed after changes.
What should I inspect before driving a 2017 Mercedes-Benz CLA45 AMG on new tires?
Before driving a 2017 Mercedes-Benz CLA45 AMG on new tires, inspect the wheels for the correct diameter, verify that the tires match the installed rims, and check that each tire is properly seated and inflated. It is also wise to look over the suspension and alignment condition, since a performance car can be sensitive to setup issues.
A short visual check should also include tread and sidewall condition, valve stems, and any obvious rubbing marks inside the wheel wells. After installation, pay attention to vibration, pull, or unexpected contact during steering. Catching those problems early helps confirm the new tires suit the car's actual wheel and suspension setup.
How often should tires on a 2017 Mercedes-Benz CLA45 AMG be inspected?
Tires on a 2017 Mercedes-Benz CLA45 AMG should be inspected regularly, not just when wear becomes obvious. A quick check of pressure, tread condition, sidewall damage, and uneven wear should be part of normal ownership, especially because this car uses low-profile performance radials that can react quickly to alignment or impact issues.
A more careful inspection is smart before longer drives, after pothole impacts, and anytime the car has been stored for a while. Looking for cuts, bulges, cracking, or slow air loss helps catch problems before they become road issues. On a performance-oriented fitment, routine checks are part of preserving both drivability and wheel protection.
