What is the recommended tire pressure for a 2023 Mercedes-Benz EQS?

The 2023 Mercedes-Benz EQS uses 42 PSI cold on the front axle and 44 PSI cold on the rear axle. These are the OEM specifications. Always measure tire pressure when the tires are cold — before driving or after sitting for at least 3 hours.

What tire size does the 2023 Mercedes-Benz EQS use?

The standard (base trim) tire size for the 2023 Mercedes-Benz EQS is 265/40R21. Higher trim levels and optional packages may use a different size — check the sticker inside your driver's door for the exact specification for your vehicle.

How do I convert the 2023 Mercedes-Benz EQS tire pressure to bar?

42 PSI = 2.9 bar (front) and 44 PSI = 3.0 bar (rear). In kPa: 290 kPa front and 303 kPa rear. Multiply PSI × 0.0689 to convert to bar.

Why are the front and rear tire pressures different on the 2023 Mercedes-Benz EQS?

The 2023 Mercedes-Benz EQS uses 42 PSI front and 44 PSI rear because the two axles carry different loads. The front axle carries roughly 50% of the vehicle's 2480 kg curb weight, requiring a slightly different pressure to maintain the correct contact patch at each corner.

What happens if the 2023 Mercedes-Benz EQS tires are underinflated?

Running 5+ PSI low on the Mercedes-Benz EQS causes uneven shoulder wear, increased rolling resistance (worse fuel economy), higher tire operating temperature, and reduced wet braking performance. In extreme cases, chronic underinflation can cause sidewall failure. Check pressure monthly and always after a large temperature swing.

What do the numbers in 265/40R21 mean on the 2023 Mercedes-Benz EQS?

On the 2023 Mercedes-Benz EQS, 265/40R21 breaks down as: 265 = section width in millimetres (10.43"), 40 = aspect ratio (the sidewall is 40% of the width, so 106 mm / 4.17" tall), R = radial construction, and 21 = the wheel diameter in inches.

What is the overall diameter of the 2023 Mercedes-Benz EQS tires?

The 265/40R21 tire on the 2023 Mercedes-Benz EQS has an overall diameter of about 29.35" (745 mm) and a rolling circumference of roughly 92.19", giving about 687 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.

2023 Mercedes-Benz EQS Tire Pressure

OEM cold pressure spec — verified for the 2022–2024 generation.

Recommended cold pressure

Front

42PSI

290 kPa

Rear

44PSI

303 kPa

Tire size

265/40R21

Curb weight

2,480 kg

Front axle

50%

2023 Mercedes-Benz EQS tire size: 265/40R21

The factory (base-trim) tire size for the 2023 Mercedes-Benz EQS is 265/40R21. Here is what that size measures out to in the real world — useful when comparing replacement tires or checking whether a different size will fit.

Section width

265 mm

10.43"

Aspect ratio

40%

106 mm sidewall

Wheel diameter

21"

rim

Overall diameter: 29.35"; 745 mm
Sidewall height: 4.17"; 106 mm
Circumference: 92.19"; rolling
Revs / mile: 687; approx.

Staying within ±3% of the 29.35" overall diameter keeps your speedometer accurate. A larger diameter reads slower than your true speed; a smaller one reads faster.

Custom adjustment

Tune for your load & driving style

Pre-filled with Mercedes-Benz EQS specs. Adjust weight or style below.

Recommended COLD pressure

32.6 / 32.6 PSI

Front (cold): 32.6 PSI(2.25 bar)
Rear (cold): 32.6 PSI(2.25 bar)
Front (hot est.): 35.8 PSI
Rear (hot est.): 35.8 PSI

Street setting: balanced for comfort, wear, and fuel economy. Always measure cold.

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FAQ

2023 Mercedes-Benz EQS

What is the recommended tire pressure for a 2023 Mercedes-Benz EQS?: The 2023 Mercedes-Benz EQS uses 42 PSI cold on the front axle and 44 PSI cold on the rear axle. These are the OEM specifications. Always measure tire pressure when the tires are cold — before driving or after sitting for at least 3 hours.
What tire size does the 2023 Mercedes-Benz EQS use?: The standard (base trim) tire size for the 2023 Mercedes-Benz EQS is 265/40R21. Higher trim levels and optional packages may use a different size — check the sticker inside your driver's door for the exact specification for your vehicle.
How do I convert the 2023 Mercedes-Benz EQS tire pressure to bar?: 42 PSI = 2.9 bar (front) and 44 PSI = 3.0 bar (rear). In kPa: 290 kPa front and 303 kPa rear. Multiply PSI × 0.0689 to convert to bar.
Why are the front and rear tire pressures different on the 2023 Mercedes-Benz EQS?: The 2023 Mercedes-Benz EQS uses 42 PSI front and 44 PSI rear because the two axles carry different loads. The front axle carries roughly 50% of the vehicle's 2480 kg curb weight, requiring a slightly different pressure to maintain the correct contact patch at each corner.
What happens if the 2023 Mercedes-Benz EQS tires are underinflated?: Running 5+ PSI low on the Mercedes-Benz EQS causes uneven shoulder wear, increased rolling resistance (worse fuel economy), higher tire operating temperature, and reduced wet braking performance. In extreme cases, chronic underinflation can cause sidewall failure. Check pressure monthly and always after a large temperature swing.
What do the numbers in 265/40R21 mean on the 2023 Mercedes-Benz EQS?: On the 2023 Mercedes-Benz EQS, 265/40R21 breaks down as: 265 = section width in millimetres (10.43"), 40 = aspect ratio (the sidewall is 40% of the width, so 106 mm / 4.17" tall), R = radial construction, and 21 = the wheel diameter in inches.
What is the overall diameter of the 2023 Mercedes-Benz EQS tires?: The 265/40R21 tire on the 2023 Mercedes-Benz EQS has an overall diameter of about 29.35" (745 mm) and a rolling circumference of roughly 92.19", giving about 687 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.