What is the recommended tire pressure for a 2020 GMC Terrain?

The 2020 GMC Terrain uses 33 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 2020 GMC Terrain use?

The standard (base trim) tire size for the 2020 GMC Terrain is 225/65R17. 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 2020 GMC Terrain tire pressure to bar?

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

Why are the front and rear tire pressures the same on the 2020 GMC Terrain?

The 2020 GMC Terrain uses equal pressure front and rear (33 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.

What happens if the 2020 GMC Terrain tires are underinflated?

Running 5+ PSI low on the GMC Terrain 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 225/65R17 mean on the 2020 GMC Terrain?

On the 2020 GMC Terrain, 225/65R17 breaks down as: 225 = section width in millimetres (8.86"), 65 = aspect ratio (the sidewall is 65% of the width, so 146.3 mm / 5.76" tall), R = radial construction, and 17 = the wheel diameter in inches.

What is the overall diameter of the 2020 GMC Terrain tires?

The 225/65R17 tire on the 2020 GMC Terrain has an overall diameter of about 28.52" (724 mm) and a rolling circumference of roughly 89.58", giving about 707 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.

2020 GMC Terrain Tire Pressure

OEM cold pressure spec — verified for the 2018–2024 generation.

Recommended cold pressure

Front

33PSI

228 kPa

Rear

33PSI

228 kPa

Tire size

225/65R17

Curb weight

1,640 kg

Front axle

59%

2020 GMC Terrain tire size: 225/65R17

The factory (base-trim) tire size for the 2020 GMC Terrain is 225/65R17. 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

225 mm

8.86"

Aspect ratio

65%

146.3 mm sidewall

Wheel diameter

17"

rim

Overall diameter: 28.52"; 724 mm
Sidewall height: 5.76"; 146.3 mm
Circumference: 89.58"; rolling
Revs / mile: 707; approx.

Staying within ±3% of the 28.52" 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

22.3 / 22 PSI

Front (cold): 22.3 PSI(1.54 bar)
Rear (cold): 22 PSI(1.52 bar)
Front (hot est.): 24.6 PSI
Rear (hot est.): 24.2 PSI

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

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FAQ

2020 GMC Terrain

What is the recommended tire pressure for a 2020 GMC Terrain?: The 2020 GMC Terrain uses 33 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 2020 GMC Terrain use?: The standard (base trim) tire size for the 2020 GMC Terrain is 225/65R17. 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 2020 GMC Terrain tire pressure to bar?: 33 PSI = 2.3 bar (front) and 33 PSI = 2.3 bar (rear). In kPa: 228 kPa front and 228 kPa rear. Multiply PSI × 0.0689 to convert to bar.
Why are the front and rear tire pressures the same on the 2020 GMC Terrain?: The 2020 GMC Terrain uses equal pressure front and rear (33 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.
What happens if the 2020 GMC Terrain tires are underinflated?: Running 5+ PSI low on the GMC Terrain 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 225/65R17 mean on the 2020 GMC Terrain?: On the 2020 GMC Terrain, 225/65R17 breaks down as: 225 = section width in millimetres (8.86"), 65 = aspect ratio (the sidewall is 65% of the width, so 146.3 mm / 5.76" tall), R = radial construction, and 17 = the wheel diameter in inches.
What is the overall diameter of the 2020 GMC Terrain tires?: The 225/65R17 tire on the 2020 GMC Terrain has an overall diameter of about 28.52" (724 mm) and a rolling circumference of roughly 89.58", giving about 707 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.