2018 Mercedes-Benz CLS63 AMG S Tires

The 2018 Mercedes-Benz CLS63 AMG S uses a staggered tire setup with two sizes: 255/35R19 at the front and 285/30R19 at the rear. Both are radial tire sizes mounted on 19-inch rims, and they are assigned by axle position rather than offered as interchangeable choices for the same wheel location.

That means the first step is identifying whether the tire being replaced is on the front or rear of the car. Matching the correct axle position is especially important on a performance-oriented Mercedes-Benz, since wheel width, tire width, and overall chassis balance can all be affected if the front and rear fitments are mixed.

The 2018 Mercedes-Benz CLS63 AMG S uses 19-inch rims with both of its primary tire sizes. The front 255/35R19 and rear 285/30R19 fitments share the same rim diameter, even though the tire widths and profiles differ between the two axle positions.

Rim diameter is only one part of the fitment picture on this car. It is still important to confirm whether the wheel is the front or rear wheel, and to check actual wheel width and any aftermarket changes before choosing a replacement tire, especially if the car no longer carries its original wheel setup.

The 2018 Mercedes-Benz CLS63 AMG S has more than one tire size because it uses a staggered setup. The front axle uses 255/35R19, while the rear axle uses 285/30R19, so the size difference is tied to tire position rather than to multiple interchangeable factory fitments at the same end of the vehicle.

For the owner, that means tire replacement starts with location, not just wheel diameter. A 19-inch tire that is correct for the front is not automatically correct for the rear, so it helps to verify axle position, wheel width, and any suspension or wheel modifications before mounting a different size.

Choosing a 255/35R19 tire for a 2018 Mercedes-Benz CLS63 AMG S starts with confirming that the tire is for the front axle. In this size, available BFGoodrich options include several g-Force series with blackwall styling, radial construction, and rim-width fitments centered around performance-oriented 19-inch applications.

After the size is confirmed, compare the available series by their intended character, wheel-width compatibility, and other product details such as weight or load figures where shown. That approach is more useful than comparing by brand alone here, since the front fitment choices come from the same manufacturer but serve slightly different selection priorities.

The available 255/35R19 tires for the 2018 Mercedes-Benz CLS63 AMG S use a blackwall sidewall style. That gives the front fitment a clean modern performance appearance that suits the car's late-model AMG character without introducing period-style whitewall or stripe treatments.

Sidewall style is mainly an appearance choice once the correct size and axle position are established. On a car like the CLS63 AMG S, the more important functional checks are still the tire's exact size, wheel compatibility, and whether the selected front tire matches the intended overall look and setup already in place on the vehicle.

For the 255/35R19 front fitment on the 2018 Mercedes-Benz CLS63 AMG S, available tire series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. All are radial blackwall tires in the correct 19-inch front size, but they differ by series identity and product specification details.

Series names help narrow the field, but they should not replace basic fitment checks. It still makes sense to compare wheel-width range, load information where shown, and the role of the tire on the front axle before making a final selection, especially if the car has changed wheels or no longer runs a matching setup at all four corners.

A period-style approach for a 2018 Mercedes-Benz CLS63 AMG S usually means preserving its modern AMG presentation rather than trying to give it a vintage tire look. The correct starting point is the original staggered sizing concept, with 255/35R19 at the front and 285/30R19 at the rear, both in radial construction on 19-inch rims.

Because this is a late-model high-performance sedan, appearance and fitment work best when they stay consistent with the car's contemporary wheel-and-tire proportions. A replacement tire should support that look while also matching the proper axle position, and any attempt to change size or wheel configuration should be checked carefully against clearance and overall setup.

Tire construction does not create a bias-ply-versus-radial appearance choice on the 2018 Mercedes-Benz CLS63 AMG S, because its primary fitments are radial tires. The visual effect comes more from keeping the correct staggered low-profile sizing, 19-inch wheel presence, and clean blackwall presentation than from choosing between older and newer construction styles.

On a restoration-minded or collector-kept example, maintaining the right proportions matters more than adding nostalgic styling cues that do not suit the car's era. The strongest appearance choice is usually a tire that preserves the intended front and rear relationship, sits properly on the wheel, and avoids introducing a mismatched stance through incorrect sizing.

Yes, modifications can affect tire fitment on a 2018 Mercedes-Benz CLS63 AMG S even when the wheel still measures 19 inches. Aftermarket wheels, different wheel widths, altered offsets, lowering changes, or suspension work can all change how a 255/35R19 front or 285/30R19 rear tire sits in relation to the fender, suspension, and steering components.

That is why replacement should never rely on diameter alone. A modified car should be checked for current wheel specifications and actual tire clearance at both steering lock and normal ride height, since the CLS63 AMG S uses a staggered arrangement and small setup changes can affect front and rear fitment differently.

Before driving a 2018 Mercedes-Benz CLS63 AMG S on new tires, inspect that the correct front and rear sizes have been mounted in the proper positions and that each tire seats properly on the wheel. It also helps to check inflation, valve condition, wheel condition, and any visible interference points around the suspension and inner fender areas.

A short initial drive should be followed by another visual check for rubbing, uneven seating, or air loss. On a high-performance sedan with staggered tires, even a small mounting or clearance issue can show up quickly, so confirming position, pressure stability, and smooth operation early is a sensible step before regular road use.

Tires on a 2018 Mercedes-Benz CLS63 AMG S should be inspected regularly rather than only when tread looks low. Frequent checks for pressure loss, irregular wear, cuts, bulges, and sidewall damage are especially important on low-profile 19-inch tires, since problems can become more noticeable in ride quality and handling as the condition changes.

Cars that see limited use still benefit from routine inspection because age, storage conditions, and long periods of inactivity can affect tire condition over time. Looking over both the front 255/35R19 and rear 285/30R19 fitments on a regular schedule helps catch issues early and keeps the staggered setup working as intended.