The 2010 Mercedes-Benz S550 sits in the modern flagship luxury-sedan tradition, blending long-distance comfort, strong V8 power, and the substantial road presence that defined the S-Class in this era. Tire selection on this car is more configuration-specific than it first appears, because the S550 uses three primary radial sizes: 255/45R18, 255/40R19, and 275/40R19. That means the first step is confirming whether the car has the standard 18-inch setup or a 19-inch sport arrangement, including front and rear sizing. From there, the real decision centers on matching the correct size to the car's wheel package, driving use, and preferred sidewall style.
Which Tire Size Is Right for The 2010 Mercedes-Benz S550
The 2010 Mercedes-Benz S550 uses three primary tire sizes, and the right one depends on the exact sub-model and wheel package. Some versions use a square setup with one size at all four corners, while sport configurations can use staggered 19-inch front and rear sizes. Before choosing a tire, confirm whether the car is on 18-inch or 19-inch wheels and whether it uses the same size front and rear.
A 255/45R18 tire is a metric radial size with a 255-millimeter nominal section width, a 45-series profile, and fitment for an 18-inch rim. On the 2010 Mercedes-Benz S550, this size serves standard-wheel configurations and keeps the fitment in an all-radial format suited to the car's modern luxury-sedan character. Available choices include Blackwall, RWL, and Redline presentations from BFGoodrich, Nitto, and Pro-Trac across series such as g-Force Sport Comp 2, g-Force Comp 2 AS, Nitto NT555 G2, and Street Pro III. This size is the right place to start when the car has the non-sport 18-inch wheel setup.
Fit(s): 4Matic w/Sport Pkg., Base Front, and w/Sport Pkg. Front
Construction: Radial|Rim: 19 in
A 255/40R19 tire uses the same 255-millimeter nominal width but with a lower 40-series profile on a 19-inch rim. On the 2010 Mercedes-Benz S550, this size appears on sport-oriented front fitments and on certain 19-inch square applications, making wheel-package confirmation especially important. Product selection includes Blackwall, RWL, and Redline options, with BFGoodrich and Pro-Trac offerings in series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Street Pro III. Buyers considering this size should verify whether the car uses matching 255/40R19 tires all around or a staggered rear size.
A 275/40R19 tire is a wider metric radial size, using a 275-millimeter nominal section width, a 40-series profile, and a 19-inch rim diameter. On the 2010 Mercedes-Benz S550, this size is used at the rear on staggered sport-package configurations rather than across every version of the car. Available tires in this size focus on Blackwall performance-oriented choices from BFGoodrich and Nitto, including g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and Nitto NT555 G2. This is the size to evaluate when the car carries a wider rear 19-inch wheel and tire setup.
Fitment for the 2010 Mercedes-Benz S550 varies by sub-model and wheel package rather than staying uniform across the range. Checking the exact configuration matters here, especially because some versions use 18-inch wheels while sport applications move to 19-inch front and rear sizing.
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2010 Mercedes-Benz S550 4Matic
The 2010 Mercedes-Benz S550 4Matic uses a 255/45R18 radial fitment. Tire selection here centers less on size choice and more on choosing the right product style, brand, and wheel-compatible specification for the 18-inch setup.
The 2010 Mercedes-Benz S550 4Matic w/Sport Pkg. uses a 255/40R19 radial tire. That makes 19-inch wheel confirmation important before purchase, especially when comparing Blackwall, RWL, and Redline options within this lower-profile size.
The 2010 Mercedes-Benz S550 Base uses the 255/45R18 radial size. For this configuration, the main decision is selecting the right 18-inch tire series and sidewall presentation rather than sorting through multiple primary fitments.
The 2010 Mercedes-Benz S550 Base Front uses 255/40R19, indicating a 19-inch front sport-style fitment. Tire selection should account for the car's front-position sizing and whether the rear uses a matching or wider companion size.
The 2010 Mercedes-Benz S550 Base Rear uses a 275/40R19 radial tire. This wider rear fitment points to a staggered arrangement, so the best approach is confirming both rear wheel size and matching front-to-rear setup before choosing tires.
The 2010 Mercedes-Benz S550 w/Sport Pkg. Front uses 255/40R19. Buyers with this configuration should focus on front fitment accuracy, 19-inch wheel compatibility, and the preferred combination of tire series and sidewall style.
The 2010 Mercedes-Benz S550 w/Sport Pkg. Rear uses 275/40R19. Because this is a dedicated rear size in a staggered setup, tire choice should begin with rear wheel confirmation and then move to the available Blackwall performance-oriented options.
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 2010 Mercedes-Benz S550 Tires for Sale
Available 2010 Mercedes-Benz S550 tires span 18-inch and 19-inch radial fitments from BFGoodrich, Nitto, and Pro-Trac. Depending on size, buyers can compare g-Force, NT555 G2, Phenom T/A, and Street Pro III options in Blackwall, RWL, and Redline sidewall styles.
Common questions for the 2010 Mercedes-Benz S550 usually come down to identifying the correct tire size by sub-model, confirming 18-inch versus 19-inch wheel fitment, and comparing available radial tire styles, brands, and maintenance considerations.
Tire Size & Fitment
What tire size fits a 2010 Mercedes-Benz S550?
The 2010 Mercedes-Benz S550 uses three primary tire sizes: 255/45R18, 255/40R19, and 275/40R19. Standard configurations use 255/45R18, while sport-oriented 19-inch setups use 255/40R19 at the front and, in staggered applications, 275/40R19 at the rear.
The right choice depends on the exact sub-model and wheel arrangement, not just the model name on the trunk. Checking whether the car has 18-inch wheels or a 19-inch sport package, and whether it uses the same size front and rear, should happen before comparing brands or sidewall styles.
What size rim does a 2010 Mercedes-Benz S550 use?
The 2010 Mercedes-Benz S550 uses either an 18-inch or 19-inch rim, depending on configuration. The 255/45R18 tire fits an 18-inch wheel, while both 255/40R19 and 275/40R19 fit 19-inch wheels.
Wheel diameter is the first fitment detail to confirm because it separates the standard setup from the sport-related options. Once diameter is verified, the next step is checking whether the car uses a square layout or a staggered front and rear arrangement so the tire size matches the actual wheel package.
Why does the 2010 Mercedes-Benz S550 have more than one tire size?
More than one tire size appears on the 2010 Mercedes-Benz S550 because different sub-models and wheel packages use different setups. Some versions use 255/45R18 on 18-inch wheels, while sport-related configurations move to 19-inch fitments with 255/40R19 front sizing and 275/40R19 rear sizing.
That variation means size selection starts with the car's actual configuration, not a broad one-size-fits-all assumption. Looking at all four tires, measuring wheel diameter, and confirming whether the rear tires are wider than the fronts helps avoid ordering a front size for a rear position or choosing an 18-inch tire for a 19-inch wheel.
Choosing the Right Tire
What should I consider when choosing a 2010 Mercedes-Benz S550 tire?
Start with the exact tire size and wheel diameter the car uses: 255/45R18, 255/40R19, or 275/40R19. From there, compare radial tire series, sidewall presentation, and wheel-width compatibility where it is stated, since the S550's fitment can be standard, sport, square, or staggered.
Driving use also matters. A buyer focused on a clean modern luxury look may lean toward Blackwall styling, while someone who wants a more customized presentation may look at RWL or Redline offerings in the applicable size. The best comparison is always within the correct size for that exact front or rear position.
What sidewall styles are available for 2010 Mercedes-Benz S550 tires?
Sidewall style depends on tire size. Blackwall choices are available across all three primary S550 sizes, while RWL and Redline treatments appear in 255/45R18 and 255/40R19 through Pro-Trac Street Pro III offerings.
That gives the 18-inch and 19-inch front fitments more appearance variety than the 275/40R19 rear size, which stays focused on Blackwall options. Sidewall style should be chosen after confirming the correct size, since appearance preference does not override wheel diameter, front-to-rear layout, or the car's actual sport-package configuration.
What brands offer tires for the 2010 Mercedes-Benz S550?
Tires for the 2010 Mercedes-Benz S550 are available from BFGoodrich, Nitto, and Pro-Trac. Depending on size, the selection includes series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
The useful comparison is not simply brand against brand, but which products are offered in the exact size the car needs. Some sizes have broader sidewall-style variety, while others focus on Blackwall performance-oriented choices. Matching the right size first keeps brand preference from leading to an otherwise incorrect fitment decision.
Restoration & Appearance
Which tire should I choose for a period-style 2010 Mercedes-Benz S550?
A period-style approach for a 2010 Mercedes-Benz S550 still begins with the car's actual factory-era fitment type, which in this case is modern radial sizing. The key is choosing the correct 18-inch or 19-inch tire size first, then selecting a tire series and sidewall treatment that suits the car's intended presentation.
Blackwall tires usually maintain the most understated luxury-sedan look, while RWL or Redline options create a more customized visual statement in the sizes where they are offered. Buyers pursuing exact originality should confirm wheel and appearance details against vehicle-specific historical references before treating any sidewall style as an exact restoration match.
How does tire construction affect the appearance of a restored 2010 Mercedes-Benz S550?
On a 2010 Mercedes-Benz S550, construction does not create a bias-ply-versus-radial decision because the primary fitments are radial. Appearance changes come more from the chosen tire series and sidewall style than from construction type, especially when comparing Blackwall against RWL or Redline options.
That makes the visual goal fairly straightforward: keep the correct modern radial size and then decide how subtle or expressive the sidewall should look. A careful match between wheel diameter, front-to-rear sizing, and sidewall presentation usually does more for the finished look than chasing a style that does not align with the car's actual fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2010 Mercedes-Benz S550?
Yes. A 2010 Mercedes-Benz S550 can be sensitive to wheel and tire changes because it already uses more than one factory-style size and, in some configurations, a staggered 19-inch setup. Aftermarket wheels, suspension lowering, spacer use, or nonstandard front-to-rear sizing can all change fitment requirements.
The safest approach is to confirm actual wheel diameter and width on the car before selecting tires, then check clearance at the fender, steering, and suspension through the full range of motion. A modified S550 should never be treated the same as a stock 18-inch or 19-inch configuration without those checks.
What should I inspect before driving a 2010 Mercedes-Benz S550 on new tires?
Before road use, inspect tire pressure, bead seating, visible sidewall condition, and tread area for shipping or mounting damage. It also helps to confirm that the 2010 Mercedes-Benz S550 has the correct size at each position, especially if the car uses 255/40R19 front tires with 275/40R19 rear tires.
A short, careful test drive is worthwhile after installation. Listen for rubbing, feel for vibration, and recheck clearances with the steering turned lock to lock on front tires. Luxury sedans can mask small issues at low speed, so a second inspection after the first drive can catch fitment or inflation problems early.
How often should tires on a 2010 Mercedes-Benz S550 be inspected?
Tires on a 2010 Mercedes-Benz S550 should be inspected regularly, not only when tread appears low. Pressure loss, uneven wear, cuts, bulges, and sidewall aging can develop long before a tire looks obviously worn, especially on a car that may alternate between frequent highway use and longer parked periods.
A quick visual check before driving and a more complete inspection at routine service intervals is a sensible pattern. Owners should also watch for uneven front-to-rear wear on staggered setups, since the 255/40R19 front and 275/40R19 rear arrangement means the tires do not all share the same role or wear pattern.
