T175/90R18 in Inches

Tire size T175/90R18 refers to the tire size in numbers and letters such as the first number “175” indicates the tire width in millimeters, the second number “90” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A T175/90R18 tire in inches can be described as a tire with a width of about 6.9 inches, a sidewall height of about 6.2 inches, and it fits on a 18-inch wheel.

Converting T175/90R18 in Inches

T175/90R18 inches mm
Tire Diameter 30.4 inches 773 mm
Tread Width 6.9 inches 175 mm
Rim Diameter 18 inches 457 mm
Sidewall Height 6.2 inches 158 mm
Circumference 95.5 inches 2427 mm
Revolutions 663 per mile 412 per km

Tire Size Calculator

The Tire Size Calculator is a convenient online tool that helps determine the correct tire dimensions for a vehicle, ensuring optimal performance and compatibility.

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

T175/90R18 Alternate Tire Size

Tire Size Overall Diameter Difference
245/60R18 29.6″ (751 mm) -2.8%
305/40R20 29.6″ (752 mm) -2.7%
245/55R19 29.6″ (753 mm) -2.6%
245/50R20 29.7″ (754 mm) -2.5%
165/90R18 29.7″ (755 mm) -2.3%
275/45R20 29.8″ (756 mm) -2.2%
275/50R19 29.9″ (759 mm) -1.8%
275/55R18 29.9″ (759 mm) -1.8%
255/60R18 30″ (763 mm) -1.3%
255/55R19 30″ (763 mm) -1.3%
175/80R19 30″ (763 mm) -1.3%
235/65R18 30″ (763 mm) -1.3%
255/50R20 30.1″ (764 mm) -1.2%
285/45R20 30.1″ (764 mm) -1.2%
235/60R19 30.1″ (765 mm) -1%
235/55R20 30.2″ (766 mm) -0.9%
285/55R18 30.4″ (771 mm) -0.3%
265/50R20 30.5″ (774 mm) 0.1%
295/45R20 30.5″ (774 mm) 0.1%
245/65R18 30.5″ (775 mm) 0.3%
265/55R19 30.5″ (775 mm) 0.3%
265/60R18 30.5″ (775 mm) 0.3%
165/90R19 30.7″ (781 mm) 1%
305/45R20 30.8″ (782 mm) 1.2%
275/50R20 30.9″ (784 mm) 1.4%
275/55R19 30.9″ (785 mm) 1.6%
275/60R18 31″ (787 mm) 1.8%
235/70R18 31″ (787 mm) 1.8%
255/55R20 31″ (788 mm) 1.9%
235/65R19 31.1″ (789 mm) 2.1%
255/65R18 31.1″ (789 mm) 2.1%
255/60R19 31.1″ (789 mm) 2.1%
285/50R20 31.3″ (794 mm) 2.7%
225/75R18 31.3″ (795 mm) 2.8%

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