What is the recommended tire pressure for a 2024 Subaru WRX?

The 2024 Subaru WRX uses 35 PSI cold on the front axle and 33 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 2024 Subaru WRX use?

The standard (base trim) tire size for the 2024 Subaru WRX is 245/40R18. 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 2024 Subaru WRX tire pressure to bar?

35 PSI = 2.4 bar (front) and 33 PSI = 2.3 bar (rear). In kPa: 241 kPa front and 228 kPa rear. Multiply PSI × 0.0689 to convert to bar.

Why are the front and rear tire pressures different on the 2024 Subaru WRX?

The 2024 Subaru WRX uses 35 PSI front and 33 PSI rear because the two axles carry different loads. The front axle carries roughly 58% of the vehicle's 1520 kg curb weight, requiring a slightly different pressure to maintain the correct contact patch at each corner.

What happens if the 2024 Subaru WRX tires are underinflated?

Running 5+ PSI low on the Subaru WRX 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 245/40R18 mean on the 2024 Subaru WRX?

On the 2024 Subaru WRX, 245/40R18 breaks down as: 245 = section width in millimetres (9.65"), 40 = aspect ratio (the sidewall is 40% of the width, so 98 mm / 3.86" tall), R = radial construction, and 18 = the wheel diameter in inches.

What is the overall diameter of the 2024 Subaru WRX tires?

The 245/40R18 tire on the 2024 Subaru WRX has an overall diameter of about 25.72" (653 mm) and a rolling circumference of roughly 80.79", giving about 784 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.

2024 Subaru WRX Tire Pressure

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

Recommended cold pressure

Front

35PSI

241 kPa

Rear

33PSI

228 kPa

Tire size

245/40R18

Curb weight

1,520 kg

Front axle

58%

2024 Subaru WRX tire size: 245/40R18

The factory (base-trim) tire size for the 2024 Subaru WRX is 245/40R18. 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

40%

98 mm sidewall

Wheel diameter

18"

rim

Overall diameter: 25.72"; 653 mm
Sidewall height: 3.86"; 98 mm
Circumference: 80.79"; rolling
Revs / mile: 784; approx.

Staying within ±3% of the 25.72" overall diameter keeps your speedometer accurate. A larger diameter reads slower than your true speed; a smaller one reads faster.

Custom adjustment

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Recommended COLD pressure

30.9 / 22.4 PSI

Front (cold): 30.9 PSI(2.13 bar)
Rear (cold): 22.4 PSI(1.54 bar)
Front (hot est.): 34 PSI
Rear (hot est.): 24.6 PSI

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

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FAQ

2024 Subaru WRX

What is the recommended tire pressure for a 2024 Subaru WRX?: The 2024 Subaru WRX uses 35 PSI cold on the front axle and 33 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 2024 Subaru WRX use?: The standard (base trim) tire size for the 2024 Subaru WRX is 245/40R18. 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 2024 Subaru WRX tire pressure to bar?: 35 PSI = 2.4 bar (front) and 33 PSI = 2.3 bar (rear). In kPa: 241 kPa front and 228 kPa rear. Multiply PSI × 0.0689 to convert to bar.
Why are the front and rear tire pressures different on the 2024 Subaru WRX?: The 2024 Subaru WRX uses 35 PSI front and 33 PSI rear because the two axles carry different loads. The front axle carries roughly 58% of the vehicle's 1520 kg curb weight, requiring a slightly different pressure to maintain the correct contact patch at each corner.
What happens if the 2024 Subaru WRX tires are underinflated?: Running 5+ PSI low on the Subaru WRX 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 245/40R18 mean on the 2024 Subaru WRX?: On the 2024 Subaru WRX, 245/40R18 breaks down as: 245 = section width in millimetres (9.65"), 40 = aspect ratio (the sidewall is 40% of the width, so 98 mm / 3.86" tall), R = radial construction, and 18 = the wheel diameter in inches.
What is the overall diameter of the 2024 Subaru WRX tires?: The 245/40R18 tire on the 2024 Subaru WRX has an overall diameter of about 25.72" (653 mm) and a rolling circumference of roughly 80.79", giving about 784 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.