The 2021 Mercedes-Benz S580 sits at the top of the modern S-Class lineup, combining full-size luxury with the kind of quiet high-speed composure buyers expect from a flagship sedan. That matters when choosing tires, because this exact model uses multiple modern metric radial sizes across 19-, 20-, and 21-inch wheel fitments, including staggered front and rear setups on some configurations. Tire selection here is less about vintage construction choices and more about matching the correct size to the wheel position, then comparing available series and sidewall treatments where they exist. The right choice starts with confirming the exact sub-model and wheel setup already on the car.
Which Tire Size Is Right for The 2021 Mercedes-Benz S580
The 2021 Mercedes-Benz S580 uses five primary tire sizes, and the correct one depends on the exact 4Matic configuration and wheel setup. Fitment varies by sub-model and by front or rear position on staggered applications, and rim diameter ranges from 19 to 21 inches. Before selecting a tire, confirm whether the car uses a square setup or separate front and rear sizes, then verify the actual wheel diameter on the vehicle.
255/40R20 is a metric radial size with a 255-millimeter section width, a 40-series aspect ratio, and a 20-inch rim diameter. On the 2021 Mercedes-Benz S580, it serves as one of the primary fitments and keeps the car in a modern radial construction suited to contemporary luxury-sedan use. Product choice in this size is currently limited, with a Blackwall BFGoodrich g-Force Phenom T/A option available. This size is worth evaluating when the car already wears 20-inch wheels and the goal is to stay with the proper front or square-fitment sizing.
255/45R19 is a metric radial size that uses a 255-millimeter section width, a 45-series profile, and a 19-inch rim. For the 2021 Mercedes-Benz S580, this size appears on a 19-inch wheel fitment and remains part of the model's all-radial tire strategy. The code itself is straightforward for modern buyers, but the practical point is wheel confirmation, since this size cannot be treated as interchangeable with the 20- and 21-inch options simply because the vehicle model is the same. It should be considered only when the car is equipped with the matching 19-inch wheel setup.
255/35R21 is a metric radial tire with a 255-millimeter width, a lower 35-series profile, and a 21-inch rim diameter. On the 2021 Mercedes-Benz S580, this size is used as a front-position fitment on a staggered setup, so it plays a different role than the rear tire paired with it. That makes front-to-rear position especially important during replacement, even though the size format looks familiar. Choose this size only after confirming a 21-inch front wheel arrangement and checking that the car has not been changed from its original front and rear wheel combination.
285/30R21 is a wider metric radial size with a 285-millimeter section width, a 30-series profile, and a 21-inch rim diameter. For the 2021 Mercedes-Benz S580, it serves as the rear tire in a staggered 21-inch setup, making it distinct from the narrower front fitment used on the same car. The size code tells you this tire is both wider and lower in profile than the 19-inch and 20-inch alternatives, so wheel position cannot be ignored. This is the right size to evaluate when the rear of the car carries 21-inch wheels and staggered fitment is already in place.
285/35R20 is a metric radial tire size with a 285-millimeter width, a 35-series aspect ratio, and a 20-inch rim diameter. On the 2021 Mercedes-Benz S580, it is used as a rear-position size on a staggered setup, so it should be matched to the correct wheel location rather than treated as a universal 20-inch option. This size offers the broadest visible product choice, including BFGoodrich, Nitto, and Pro-Trac options with Blackwall, raised white letter, and Redline sidewall styles across g-Force, NT555 G2, and Street Pro III series. It is the size to study most closely when appearance and brand variety matter on a 20-inch rear fitment.
Tire fitment on the 2021 Mercedes-Benz S580 is not the same across every covered configuration. Checking the exact sub-model matters because some applications use a square setup, while others use separate front and rear sizes tied to different wheel diameters.
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2021 Mercedes-Benz S580 4Matic
The 2021 Mercedes-Benz S580 4Matic uses either a 255/45R19 or 255/40R20 radial tire, depending on which wheel package is on the car. That means the first step is confirming whether the vehicle has 19-inch or 20-inch wheels before narrowing the choice to a specific tire line.
The 2021 Mercedes-Benz S580 4Matic Front position uses either 255/35R21 or 255/40R20 radial sizing, depending on the wheel arrangement. Front tire selection should be based on actual wheel diameter and the presence of a staggered setup, not just the model name on the trunk.
The 2021 Mercedes-Benz S580 4Matic Rear position uses either 285/30R21 or 285/35R20 radial sizing. Rear replacement should start with wheel-position confirmation, since this part of the car may carry a wider tire than the front and may not match the front rim diameter.
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 2021 Mercedes-Benz S580 Tires for Sale
Available product choices are concentrated in 255/40R20 and especially 285/35R20, where BFGoodrich, Nitto, and Pro-Trac offer several radial series. Buyers can compare Blackwall, raised white letter, and Redline sidewall treatments along with differences in tire series and rim-width compatibility where stated.
These 2021 Mercedes-Benz S580 tire FAQs focus on the details that matter most on this model: correct size by sub-model and wheel position, 19- through 21-inch rim fitment, product selection, and the checks to make before road use.
Tire Size & Fitment
What tire size fits a 2021 Mercedes-Benz S580?
The 2021 Mercedes-Benz S580 uses five primary tire sizes: 255/45R19, 255/40R20, 255/35R21, 285/35R20, and 285/30R21. The correct size depends on the exact 4Matic configuration, wheel diameter, and whether the car uses a square setup or a staggered front-and-rear arrangement.
That makes identification more important than brand choice at the start. Check the existing tire size on the car, confirm the wheel diameter, and note whether the rear tires are wider than the fronts. A 19-inch square setup, a 20-inch setup, and a 21-inch staggered setup all call for different replacement decisions.
What size rim does a 2021 Mercedes-Benz S580 use?
A 2021 Mercedes-Benz S580 can use 19-inch, 20-inch, or 21-inch rims, depending on the tire size and configuration. The 255/45R19 size uses a 19-inch rim, 255/40R20 and 285/35R20 use 20-inch rims, and 255/35R21 with 285/30R21 use 21-inch rims.
Rim diameter is the first fitment check because the tire must match the wheel exactly. On cars with staggered fitment, front and rear wheel diameters may match while the tire widths differ, so it is still important to confirm the tire position. Use the wheel and tire already on the car as the starting point before comparing replacement options.
Why does the 2021 Mercedes-Benz S580 have more than one tire size?
More than one tire size appears on the 2021 Mercedes-Benz S580 because the model was fitted with different wheel packages and includes staggered front-and-rear applications. Some setups use one size at all four corners, while others split the fitment between narrower front tires and wider rear tires.
That variation means the model name alone is not enough to choose a tire. The actual wheel diameter and whether the car has the same size on all four corners determine which replacement path makes sense. Looking at the tire sidewall and checking front versus rear sizes will prevent ordering a tire meant for another wheel package.
Choosing the Right Tire
What should I consider when choosing a 285/35R20 tire for a 2021 Mercedes-Benz S580?
Start with the basics: 285/35R20 is a rear-position radial size on the 2021 Mercedes-Benz S580, so the wheel diameter and tire position need to match before anything else. After that, compare available series, sidewall style, and any stated rim-width range, since this size has the broadest product variety on this vehicle.
BFGoodrich, Nitto, and Pro-Trac all appear in this size, but the meaningful choice depends on how the car is used and how you want it to look. A black sidewall keeps a clean modern presentation, while raised white letter or Redline options create a more expressive appearance. Also check the current wheel width before narrowing the field.
What sidewall styles are available for 2021 Mercedes-Benz S580 tires?
Sidewall style depends on the tire size. The visible product range for the 2021 Mercedes-Benz S580 includes Blackwall options, plus RWL and Redline treatments in 285/35R20. That means sidewall choice is part of the decision only on certain fitments, not across every size used on the car.
Appearance should follow fitment, not replace it. Confirm the correct size and wheel position first, then decide whether a plain sidewall or a more noticeable treatment suits the look of the car. On a modern luxury sedan like the S580, sidewall style changes the visual character more than the sizing itself, especially at the rear.
What brands offer tires for the 2021 Mercedes-Benz S580?
The available product selection for the 2021 Mercedes-Benz S580 includes BFGoodrich, Nitto, and Pro-Trac, depending on tire size. BFGoodrich appears in both 255/40R20 and 285/35R20, while Nitto and Pro-Trac appear in 285/35R20. Not every brand is available in every primary S580 size.
That makes size-specific shopping important. Once the car's exact fitment is confirmed, compare the brands that actually exist in that size rather than assuming the same lineup carries across 19-, 20-, and 21-inch options. It also helps to look at the tire series and sidewall treatment, since those details shape the final choice more than the brand name alone.
Restoration & Appearance
How does tire construction affect the appearance of a restored 2021 Mercedes-Benz S580?
Tire construction is less of an appearance debate on a 2021 Mercedes-Benz S580 than it would be on an older collector car, because the S580 uses modern radial sizing throughout. The visual differences come more from wheel diameter, tire profile, and sidewall treatment than from choosing between bias-ply and radial construction.
For an appearance-focused build, the main decision is whether to maintain the original style of the wheel-and-tire package already on the car. A Blackwall keeps the presentation subtle, while RWL or Redline in 285/35R20 creates a more noticeable custom effect. Staying consistent front to rear matters more than chasing a period-style look on this generation.
Does correct tire fitment matter for a 2021 Mercedes-Benz S580 restoration?
Correct tire fitment still matters on a 2021 Mercedes-Benz S580 restoration because the model uses multiple wheel diameters and, in some cases, staggered front and rear sizing. The right tire preserves the intended visual proportion of the wheel package and avoids mixing widths or profiles that do not belong together.
A clean restoration-minded result starts with confirming what wheel setup is actually on the vehicle now. Matching the proper size to each wheel position helps the car look coherent and avoids the awkward stance that can come from incorrect front-to-rear pairing. Once fitment is sorted out, sidewall style becomes the secondary appearance decision.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 Mercedes-Benz S580?
Yes. Modifications can change tire fitment on a 2021 Mercedes-Benz S580, especially if the car has aftermarket wheels, suspension changes, or a different front-and-rear setup than the original one. Even when the tire size seems close, changes in wheel diameter, width, or offset can alter clearance and placement.
That is especially important on a model with 19-, 20-, and 21-inch fitments and staggered applications. Check the actual wheel dimensions and compare front and rear positions before selecting a replacement tire. Steering clearance, fender space, and suspension travel should all be reviewed anytime the car differs from its original wheel-and-tire configuration.
What should I inspect before driving a 2021 Mercedes-Benz S580 on new tires?
Before driving a 2021 Mercedes-Benz S580 on new tires, confirm that the size matches the wheel diameter and the correct axle position. Then inspect inflation pressure, valve stems, wheel condition, and the basic condition of the suspension and alignment-related wear surfaces so the new tires are not compromised immediately.
It also helps to look for uneven clearance around the fenders and inner wheel wells, especially on staggered or larger-diameter setups. A short test drive should be used to check for rubbing, vibration, or pull. Any sign of contact or abnormal behavior deserves attention before the car is driven at normal highway speeds.
How often should tires on a 2021 Mercedes-Benz S580 be inspected?
Tires on a 2021 Mercedes-Benz S580 should be inspected regularly, not just when tread looks low. A quick check for air loss, irregular wear, cuts, bulges, and sidewall damage is worthwhile before longer drives, and a more careful inspection makes sense anytime the car has sat for a while or recently received wheel work.
Frequent inspection matters even more when the car uses staggered sizing, since front and rear tires may wear differently and cannot always be treated the same. Keep an eye on pressure consistency and overall condition rather than focusing only on tread depth. Catching an issue early is the best way to protect both the tire and the wheel.
