The 2018 Mercedes-Benz S63 AMG blends full-size S-Class luxury with the kind of power and road presence that make tire selection more than a routine maintenance decision. Whether in sedan, coupe, or cabriolet form, this is a modern high-performance grand touring Mercedes that depends on a staggered 20-inch setup to deliver its intended stance and balance. The front uses 255/40R20 and the rear uses 285/35R20, both in radial construction. Available choices include blackwall performance tires as well as rear options in raised white letter or redline styling. The key is matching the correct front-to-rear sizing while confirming wheel specs and the car's current setup.
Which Tire Size Is Right for The 2018 Mercedes-Benz S63 AMG
The 2018 Mercedes-Benz S63 AMG uses two primary tire sizes, with a staggered radial setup that places one size on the front and a wider size on the rear, both on 20-inch rims. That makes the first step simple but important: confirm whether you are replacing front or rear tires, then compare the available choices by sidewall style, tire series, and wheel-width compatibility where it applies.
Fit(s): 4Matic Coupe & Cabriolet Front and 4Matic Sedan Front
Construction: Radial|Rim: 20 in
255/40R20 is a metric radial size in which 255 refers to section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 20 is the rim diameter in inches. On the 2018 Mercedes-Benz S63 AMG, this size serves the front position in the staggered setup and supports the car's modern performance-oriented fitment. Available choices in this size include BFGoodrich in the g-Force Phenom T/A series with a blackwall sidewall. This is the size to evaluate when replacing the front tires and checking that wheel width remains within the tire's intended range.
Fit(s): 4Matic Coupe & Cabriolet Rear and 4Matic Sedan Rear
Construction: Radial|Rim: 20 in
285/35R20 is a metric radial size where 285 gives the section width in millimeters, 35 identifies the aspect ratio, R means radial construction, and 20 is the wheel diameter in inches. On the 2018 Mercedes-Benz S63 AMG, this wider size is used at the rear and is part of the vehicle's staggered front-to-rear fitment. Rear tire choices include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, raised white letter, and redline sidewall treatments available. This is the size to confirm when replacing rear tires or when appearance matters as much as the basic fitment.
Sub-model fitment is consistent in one important way: every covered version uses the same staggered 20-inch tire arrangement, with 255/40R20 in front and 285/35R20 in the rear. Checking the exact body style and axle position still matters, because front and rear tire sizes are different.
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2018 Mercedes-Benz S63 AMG 4Matic Coupe & Cabriolet Front
The front position on the 2018 Mercedes-Benz S63 AMG 4Matic Coupe & Cabriolet uses the narrower member of the staggered radial setup. Tire selection here centers on matching the front size correctly and confirming wheel-width suitability before choosing among the available performance-oriented options.
2018 Mercedes-Benz S63 AMG 4Matic Coupe & Cabriolet Rear
The rear position on the 2018 Mercedes-Benz S63 AMG 4Matic Coupe & Cabriolet uses the wider tire in the staggered 20-inch arrangement. This is also where the visible style choices broaden, with blackwall, raised white letter, and redline options available depending on the tire series selected.
The front position on the 2018 Mercedes-Benz S63 AMG 4Matic Sedan follows the same staggered radial layout used across the covered range. Replacing the front tires means confirming the correct front size first, then comparing the available series against the wheel and intended road use.
The rear position on the 2018 Mercedes-Benz S63 AMG 4Matic Sedan uses the same wider rear fitment found on the coupe and cabriolet. That makes rear tire selection less about identifying a different sedan-only size and more about choosing the right rear tire series and sidewall presentation.
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 2018 Mercedes-Benz S63 AMG Tires for Sale
Available 2018 Mercedes-Benz S63 AMG tire choices center on radial 20-inch fitments from BFGoodrich, Nitto, and Pro-Trac. Rear-tire comparisons are broader, with multiple tire series and sidewall treatments including blackwall, raised white letter, and redline.
These FAQs focus on the staggered tire sizing used on the 2018 Mercedes-Benz S63 AMG, along with rim fitment, front-versus-rear replacement, sidewall choices, product selection, and the checks that matter before regular road use.
Tire Size & Fitment
What tire size fits a 2018 Mercedes-Benz S63 AMG?
The 2018 Mercedes-Benz S63 AMG uses a staggered tire setup with 255/40R20 on the front and 285/35R20 on the rear. Both sizes are radial tires mounted on 20-inch rims, and that front-to-rear difference applies across the covered sedan, coupe, and cabriolet fitments.
That means tire replacement starts with axle position, not just year and model. A front tire and a rear tire are not interchangeable here, so it helps to confirm whether the car still has its original staggered wheel arrangement or whether aftermarket wheels or prior tire changes altered the setup.
What size rim does a 2018 Mercedes-Benz S63 AMG use?
The primary tire fitments for the 2018 Mercedes-Benz S63 AMG use 20-inch rims at both ends of the car. The front tire size is 255/40R20 and the rear tire size is 285/35R20, so both positions share the same rim diameter even though the tire widths differ.
Rim diameter is only part of the fitment picture on a staggered performance car like this one. Wheel width still matters, especially when comparing tire options, so it is worth checking the actual wheel dimensions on the car before ordering replacements for the front or rear position.
Do all 2018 Mercedes-Benz S63 AMG sub-models use the same tire size?
The covered 2018 Mercedes-Benz S63 AMG sub-models share the same overall staggered setup, with 255/40R20 used on the front and 285/35R20 used on the rear. That pattern remains the same for the 4Matic sedan and the 4Matic coupe and cabriolet applications.
The important distinction is not one body style versus another, but front versus rear position. Tire selection stays straightforward as long as the car remains on the intended staggered 20-inch arrangement, but it is still smart to confirm the actual wheel and tire setup on any vehicle that has been modified.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Mercedes-Benz S63 AMG?
Start by choosing the correct axle size, since the 2018 Mercedes-Benz S63 AMG uses 255/40R20 in front and 285/35R20 in the rear. From there, compare radial construction details, wheel-width compatibility where stated, load figures where available, and the intended character of the tire series you are considering.
Appearance can also influence the decision, especially at the rear where sidewall choices extend beyond a standard blackwall. A car kept close to its original modern AMG presentation may call for one look, while a more customized build may point toward a different sidewall treatment or tire series.
What sidewall styles are available for 2018 Mercedes-Benz S63 AMG tires?
Sidewall choice is more varied on the rear fitment than the front. The available products include blackwall options, along with rear 285/35R20 choices in raised white letter and redline, giving the S63 AMG owner some room to shape the tire's visual presentation.
That choice should still follow the correct size and axle position before appearance becomes the deciding factor. A blackwall keeps a more understated modern performance look, while raised white letter or redline sidewalls create a more customized presentation that may suit certain wheel and styling combinations better.
What brands offer tires for the 2018 Mercedes-Benz S63 AMG?
Available tire brands for the 2018 Mercedes-Benz S63 AMG include BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in both front and rear fitments, while Nitto and Pro-Trac are part of the rear 285/35R20 selection where product variety is broader.
Brand alone should not be the only deciding factor on a staggered setup. It helps to compare which size each brand offers, whether the sidewall style matches the look you want, and whether the tire series and wheel-width specifications line up with the car's current wheels and intended use.
Restoration & Appearance
Which tire should I choose for a period-style 2018 Mercedes-Benz S63 AMG?
A period-style approach on a 2018 Mercedes-Benz S63 AMG usually starts with staying faithful to the staggered 20-inch radial sizing, using 255/40R20 in front and 285/35R20 in the rear. That preserves the modern AMG-era proportions before any decisions are made about sidewall style or tire series.
From there, the visual direction depends on whether the goal is a restrained luxury-performance look or something more personalized. Blackwall tires generally keep the presentation closest to how a modern high-performance Mercedes is typically viewed, while redline or raised white letter options shift the car toward a more customized appearance.
How does tire construction affect the appearance of a restored 2018 Mercedes-Benz S63 AMG?
On the 2018 Mercedes-Benz S63 AMG, tire construction is straightforward because the primary fitment is radial. That means the appearance difference comes less from bias-ply versus radial choice and more from size accuracy, sidewall treatment, and the overall visual relationship between the tire, wheel, and body.
Keeping the correct staggered front and rear sizing helps the car retain the balanced, performance-luxury stance it was designed around. A change in sidewall style can then subtly or dramatically alter the look, so it makes sense to decide first whether the goal is a stock-like modern presentation or a custom visual statement.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Mercedes-Benz S63 AMG?
Yes. The 2018 Mercedes-Benz S63 AMG already uses a staggered 20-inch setup, so changes such as aftermarket wheels, altered wheel widths, suspension lowering, spacer use, or body modifications can affect how 255/40R20 front and 285/35R20 rear tires sit and clear the car.
Any modified setup should be checked for wheel diameter, wheel width, and clearance at full steering lock and suspension movement. Even when the tire size itself remains unchanged, differences in wheel design or suspension position can influence rubbing, stance, and how closely the new tires match the car's intended fitment.
What should I inspect before driving a 2018 Mercedes-Benz S63 AMG on new tires?
Before road use, confirm that the correct tire size is mounted on the correct axle, that inflation is set appropriately, and that each tire seats properly on the wheel. It also helps to inspect for shipping damage, sidewall irregularities, visible tread issues, and any sign of interference once the car is back on the ground.
A short, careful initial drive can reveal vibration, clearance problems, or an unintended mismatch between front and rear replacements. Recheck air pressure after that early use, and make sure the wheels, lug hardware, and tire rotation direction, if applicable, all match the current setup on the car.
How often should tires on a 2018 Mercedes-Benz S63 AMG be inspected?
Tires on a 2018 Mercedes-Benz S63 AMG should be inspected regularly, especially because high-performance cars can be sensitive to pressure changes, uneven wear, and setup issues. Monthly visual checks are a sensible routine, with closer inspection before longer trips or after any impact with potholes, curbs, or road debris.
Pay attention to tread depth, shoulder wear, cuts, bulges, and slow air loss, and compare front and rear condition separately because the car uses different tire sizes on each axle. Vehicles that sit for extended periods also deserve age and condition checks before being driven back into normal service.
