What is the recommended tire pressure for a 2023 Subaru Ascent?

The 2023 Subaru Ascent uses 35 PSI cold on the front axle and 35 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 Subaru Ascent use?

The standard (base trim) tire size for the 2023 Subaru Ascent is 245/60R18. 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 Subaru Ascent tire pressure to bar?

35 PSI = 2.4 bar (front) and 35 PSI = 2.4 bar (rear). In kPa: 241 kPa front and 241 kPa rear. Multiply PSI × 0.0689 to convert to bar.

Why are the front and rear tire pressures the same on the 2023 Subaru Ascent?

The 2023 Subaru Ascent uses equal pressure front and rear (35 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.

What happens if the 2023 Subaru Ascent tires are underinflated?

Running 5+ PSI low on the Subaru Ascent 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 245/60R18 mean on the 2023 Subaru Ascent?

On the 2023 Subaru Ascent, 245/60R18 breaks down as: 245 = section width in millimetres (9.65"), 60 = aspect ratio (the sidewall is 60% of the width, so 147 mm / 5.79" tall), R = radial construction, and 18 = the wheel diameter in inches.

What is the overall diameter of the 2023 Subaru Ascent tires?

The 245/60R18 tire on the 2023 Subaru Ascent has an overall diameter of about 29.57" (751 mm) and a rolling circumference of roughly 92.91", giving about 682 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.

2023 Subaru Ascent Tire Pressure

OEM cold pressure spec — verified for the 2019–2024 generation.

Recommended cold pressure

Front

35PSI

241 kPa

Rear

35PSI

241 kPa

Tire size

245/60R18

Curb weight

1,940 kg

Front axle

55%

2023 Subaru Ascent tire size: 245/60R18

The factory (base-trim) tire size for the 2023 Subaru Ascent is 245/60R18. 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

245 mm

9.65"

Aspect ratio

60%

147 mm sidewall

Wheel diameter

18"

rim

Overall diameter: 29.57"; 751 mm
Sidewall height: 5.79"; 147 mm
Circumference: 92.91"; rolling
Revs / mile: 682; approx.

Staying within ±3% of the 29.57" overall diameter keeps your speedometer accurate. A larger diameter reads slower than your true speed; a smaller one reads faster.

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Recommended COLD pressure

22 / 22 PSI

Front (cold): 22 PSI(1.52 bar)
Rear (cold): 22 PSI(1.52 bar)
Front (hot est.): 24.2 PSI
Rear (hot est.): 24.2 PSI

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

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FAQ

2023 Subaru Ascent

What is the recommended tire pressure for a 2023 Subaru Ascent?: The 2023 Subaru Ascent uses 35 PSI cold on the front axle and 35 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 Subaru Ascent use?: The standard (base trim) tire size for the 2023 Subaru Ascent is 245/60R18. 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 Subaru Ascent tire pressure to bar?: 35 PSI = 2.4 bar (front) and 35 PSI = 2.4 bar (rear). In kPa: 241 kPa front and 241 kPa rear. Multiply PSI × 0.0689 to convert to bar.
Why are the front and rear tire pressures the same on the 2023 Subaru Ascent?: The 2023 Subaru Ascent uses equal pressure front and rear (35 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.
What happens if the 2023 Subaru Ascent tires are underinflated?: Running 5+ PSI low on the Subaru Ascent 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 245/60R18 mean on the 2023 Subaru Ascent?: On the 2023 Subaru Ascent, 245/60R18 breaks down as: 245 = section width in millimetres (9.65"), 60 = aspect ratio (the sidewall is 60% of the width, so 147 mm / 5.79" tall), R = radial construction, and 18 = the wheel diameter in inches.
What is the overall diameter of the 2023 Subaru Ascent tires?: The 245/60R18 tire on the 2023 Subaru Ascent has an overall diameter of about 29.57" (751 mm) and a rolling circumference of roughly 92.91", giving about 682 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.