The 2008 Mercedes-Benz CLK63 AMG blends the elegance of the CLK coupe with the sharper character AMG brought to Mercedes performance cars in the 2000s. In standard form and especially in Black Series trim, it is a high-output rear-drive car whose tire setup is central to both stance and handling balance. This model uses staggered radial tire fitments, with 18-inch sizes on the Base front and rear and 19-inch sizes on the Black Series front and rear. That makes the key decision less about brand loyalty alone and more about matching the exact front or rear size, wheel diameter, and intended driving use. Careful fitment matters even more if the car has non-original wheels or suspension changes.
Which Tire Size Is Right for The 2008 Mercedes-Benz CLK63 AMG
The 2008 Mercedes-Benz CLK63 AMG uses four primary tire sizes, and they are tied to both sub-model and axle position rather than being interchangeable across the car. The first step is confirming whether the car is a Base model or a Black Series, then verifying whether you are selecting a front or rear tire and whether the wheel is 18 or 19 inches. Once that is settled, the choice becomes a matter of comparing radial tire options within the correct size.
A 225/40R18 tire is a metric radial size with a 225-millimeter section width, a 40-series aspect ratio, and fitment for an 18-inch wheel. On the 2008 Mercedes-Benz CLK63 AMG, this size is used on the Base Front position, so it is part of a staggered setup rather than a universal fitment for every version of the car. Available choices in this size come from BFGoodrich and Nitto, with blackwall styling across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. It is the right place to compare tire character and rim-width compatibility once the front 18-inch setup is confirmed.
A 255/35R18 tire is a metric radial size that uses a 255-millimeter section width, a 35-series profile, and an 18-inch rim diameter. This size serves the Base Rear position on the 2008 Mercedes-Benz CLK63 AMG, so it works as the rear counterpart to the narrower 225/40R18 front tire in the standard staggered arrangement. BFGoodrich and Nitto both offer blackwall choices here, including the g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 series. Selecting this size correctly means confirming the rear wheel specification and avoiding any mix-up with the Black Series 19-inch fitment.
A 265/30R19 tire is a metric radial with a 265-millimeter section width, a very low 30-series profile, and a 19-inch wheel diameter. On the 2008 Mercedes-Benz CLK63 AMG, this size is used on the Black Series Front position, making it specific to that higher-spec wheel and tire package rather than the Base model. The low-profile format reflects a modern performance-oriented fitment where wheel diameter and exact axle placement matter as much as the width itself. It should be evaluated only after confirming that the car is a Black Series and that the front wheel is the correct 19-inch size.
A 285/30R19 tire is a metric radial size with a 285-millimeter section width, a 30-series aspect ratio, and fitment for a 19-inch wheel. This is the Black Series Rear size on the 2008 Mercedes-Benz CLK63 AMG, pairing with the 265/30R19 front in a distinctly staggered 19-inch setup. Its wider section and low-profile construction make exact wheel and rear-axle fitment especially important, particularly on a car where appearance and handling balance are closely tied to the tire package. It is the right choice only after confirming the Black Series rear wheel rather than assuming all CLK63 AMG models share the same rear size.
Tire fitment on the 2008 Mercedes-Benz CLK63 AMG varies by both sub-model and axle position, so the exact configuration matters before choosing a tire. The Base model uses one staggered 18-inch setup, while the Black Series uses a different staggered 19-inch setup.
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2008 Mercedes-Benz CLK63 AMG Base Front
The 2008 Mercedes-Benz CLK63 AMG Base Front uses a 225/40R18 radial tire. That makes front tire selection a matter of staying with the correct 18-inch front size and comparing available blackwall performance-oriented options within that specification.
The 2008 Mercedes-Benz CLK63 AMG Base Rear uses a 255/35R18 radial tire. Rear replacement should match that staggered 18-inch rear fitment, with attention to wheel width and to keeping the proper front-to-rear relationship intact.
The 2008 Mercedes-Benz CLK63 AMG Black Series Front uses a 265/30R19 radial tire. That places tire selection around the Black Series-specific 19-inch front setup, where low-profile fitment and wheel confirmation are especially important.
The 2008 Mercedes-Benz CLK63 AMG Black Series Rear uses a 285/30R19 radial tire. Choosing a rear tire here starts with confirming the Black Series 19-inch wheel package and maintaining the intended staggered front and rear sizing.
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 2008 Mercedes-Benz CLK63 AMG Tires for Sale
Available 18-inch CLK63 AMG tire choices center on 225/40R18 and 255/35R18 radial fitments from BFGoodrich and Nitto. The product grid lets you compare blackwall performance-oriented series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, along with rim-width and load details.
These FAQs focus on the exact tire sizes used on the 2008 Mercedes-Benz CLK63 AMG, including staggered front and rear fitment, 18-inch versus 19-inch wheel setups, product selection, and the checks worth making before road use.
Tire Size & Fitment
What tire size fits a 2008 Mercedes-Benz CLK63 AMG?
The 2008 Mercedes-Benz CLK63 AMG does not use one universal tire size across every version of the car. Base models use 225/40R18 on the front and 255/35R18 on the rear, while the Black Series uses 265/30R19 on the front and 285/30R19 on the rear, all in radial construction.
That means the first step is identifying the sub-model and the axle position before selecting a tire. A front Base tire, rear Base tire, front Black Series tire, and rear Black Series tire are all different sizes, so wheel diameter and front-versus-rear placement need to be confirmed before comparing brands or tire series.
What size rim does a 2008 Mercedes-Benz CLK63 AMG use?
The 2008 Mercedes-Benz CLK63 AMG uses both 18-inch and 19-inch rim diameters, depending on the version and axle position. The Base model uses 18-inch wheels with 225/40R18 front and 255/35R18 rear tires, while the Black Series uses 19-inch wheels with 265/30R19 front and 285/30R19 rear tires.
Rim diameter is the first fitment point to verify because an 18-inch tire cannot be mounted on a 19-inch wheel, and the reverse is also true. It is also worth confirming wheel width and actual wheel setup if the car has been changed from stock, since staggered performance fitments are sensitive to size mismatches.
Why does the 2008 Mercedes-Benz CLK63 AMG have more than one tire size?
The 2008 Mercedes-Benz CLK63 AMG uses more than one tire size because it has staggered front and rear fitments, and the Black Series uses a different wheel diameter from the Base model. That creates four distinct primary sizes across the full model range: two for the Base and two for the Black Series.
For the owner, that means tire selection starts with identifying exactly which version of the car is being serviced and whether the tire is for the front or rear axle. Treating the car as if it uses a single size can lead to wheel-diameter mistakes or an incorrect front-to-rear pairing that changes the intended setup.
Choosing the Right Tire
What should I consider when choosing a tire for a 2008 Mercedes-Benz CLK63 AMG?
Start with the exact size, axle position, and wheel diameter used on the car. A 2008 Mercedes-Benz CLK63 AMG may need 225/40R18 and 255/35R18 in Base form or 265/30R19 and 285/30R19 in Black Series form, so the correct fitment comes before any comparison of brand or tire series.
Once the size is confirmed, compare construction, rim-width compatibility, load figures where shown, and the type of driving the car sees. A low-mileage collector car, a fair-weather weekend coupe, and a regularly driven performance car may all lead you toward different product choices even within the same tire size.
What sidewall styles are available for 2008 Mercedes-Benz CLK63 AMG tires?
The available 18-inch tire options for the 2008 Mercedes-Benz CLK63 AMG use blackwall sidewalls. That gives the car a clean modern performance look rather than a whitewall, redline, or raised-letter presentation, which suits the AMG character of the model.
Since the sidewall treatment is consistent here, the bigger selection differences come from brand, tire series, and wheel-width specifications rather than appearance alone. For an owner replacing tires in pairs or as a full set, matching the visual presentation front to rear still helps keep the car looking cohesive.
What brands offer tires for the 2008 Mercedes-Benz CLK63 AMG?
BFGoodrich and Nitto offer available tire choices in the 18-inch fitments used on the 2008 Mercedes-Benz CLK63 AMG Base model. Within those sizes, the BFGoodrich range includes several g-Force series, while Nitto is represented by the NT555 G2.
Brand choice should be weighed alongside the exact tire series, rim-width range, and the role the tire will play on the car. A buyer replacing only the front pair or rear pair should also think about how closely the new tires will align with the existing setup in size, category, and overall character.
Restoration & Appearance
Which tire should I choose for a period-style 2008 Mercedes-Benz CLK63 AMG?
A period-style choice for a 2008 Mercedes-Benz CLK63 AMG starts with preserving the correct staggered sizing and wheel diameter for the exact version of the car. That means keeping the Base model on its 18-inch front and rear sizes or the Black Series on its 19-inch front and rear sizes, all in radial construction.
From there, appearance is shaped more by maintaining the proper modern low-profile stance than by choosing vintage-style sidewall treatments. If originality is especially important, compare the car against marque-specific references and its current wheel setup so the finished look stays consistent with the version being restored.
Does correct tire fitment matter for a 2008 Mercedes-Benz CLK63 AMG restoration?
Correct tire fitment matters on a 2008 Mercedes-Benz CLK63 AMG because the car relies on a specific staggered setup and, depending on version, either 18-inch or 19-inch wheel diameters. Tire size influences not only appearance, but also how the car sits and how proportional the front and rear wheels look within the body.
Using the wrong diameter or mixing Base and Black Series sizes can quickly change that presentation. Even on a car aimed more at preservation than regular road use, it is worth confirming wheel dimensions, front-to-rear pairing, and the visual relationship of the tires to the body before settling on a replacement set.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Mercedes-Benz CLK63 AMG?
Modifications can affect tire fitment on a 2008 Mercedes-Benz CLK63 AMG, especially because the car already uses staggered sizing and, in Black Series form, very low-profile 19-inch tires. Aftermarket wheels, altered offsets, suspension changes, or lowering can all change how much room is available at the fender, suspension, and steering components.
Any modified car should be checked carefully before a replacement tire is chosen. Confirm the actual wheel diameter and width on the car, then inspect front and rear clearances at full steering lock and through suspension movement so the selected tire size still works with the current setup rather than an assumed original one.
What should I inspect before driving a 2008 Mercedes-Benz CLK63 AMG on new tires?
Before driving a 2008 Mercedes-Benz CLK63 AMG on new tires, confirm that each tire is mounted in the correct front or rear position and that the wheel diameter matches the tire size. It is also smart to check inflation pressure, lug torque, valve condition, and basic clearance around suspension parts and fender openings.
A short, careful road test is a sensible next step on a staggered performance car like this. Pay attention to any rubbing, vibration, pull, or unusual noise, then recheck pressures after the first drive. That process helps catch fitment issues early, particularly if the car has sat for long periods or recently received wheel work.
How often should tires on a 2008 Mercedes-Benz CLK63 AMG be inspected?
Tires on a 2008 Mercedes-Benz CLK63 AMG should be inspected regularly, even if the car is driven only occasionally. A performance coupe with staggered tires can hide wear patterns between front and rear positions, so routine checks for tread condition, cracking, punctures, bulges, and air loss are just as important as mileage-based replacement thinking.
Cars that spend long periods parked deserve even closer attention because age and storage conditions can matter as much as road use. Make inspections part of every wash or fuel stop, and give the tires a more careful once-over before any longer drive so pressure, condition, and visible clearance issues are caught early.
