305/35R21 in Inches

Tire size 305/35R21 refers to the tire size in numbers and letters such as the first number “305” indicates the tire width in millimeters, the second number “35” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A 305/35R21 tire in inches can be described as a tire with a width of about 12 inches, a sidewall height of about 4.2 inches, and it fits on a 21-inch wheel.

Converting 305/35R21 in Inches

305/35R21 inches mm
Tire Diameter 29.4 inches 747 mm
Tread Width 12 inches 305 mm
Rim Diameter 21 inches 533 mm
Sidewall Height 4.2 inches 107 mm
Circumference 92.3 inches 2346 mm
Revolutions 686 per mile 426 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

305/35R21 Alternate Tire Size

Tire Size Overall Diameter Difference
275/35R21 28.5″ (725 mm) -2.9%
275/30R22 28.5″ (725 mm) -2.9%
335/25R22 28.6″ (727 mm) -2.7%
245/40R21 28.7″ (729 mm) -2.4%
325/30R21 28.7″ (729 mm) -2.4%
245/35R22 28.8″ (731 mm) -2.1%
285/30R22 28.8″ (731 mm) -2.1%
285/35R21 28.9″ (733 mm) -1.9%
305/25R23 29″ (736 mm) -1.5%
255/40R21 29″ (737 mm) -1.3%
255/35R22 29″ (737 mm) -1.3%
295/30R22 29″ (737 mm) -1.3%
295/35R21 29.1″ (739 mm) -1.1%
315/25R23 29.2″ (742 mm) -0.7%
305/30R22 29.3″ (743 mm) -0.5%
265/35R22 29.3″ (745 mm) -0.3%
235/45R21 29.3″ (745 mm) -0.3%
265/40R21 29.3″ (745 mm) -0.3%
315/30R22 29.5″ (749 mm) 0.3%
275/35R22 29.6″ (751 mm) 0.5%
275/40R21 29.6″ (753 mm) 0.8%
245/45R21 29.6″ (753 mm) 0.8%
315/35R21 29.6″ (753 mm) 0.8%
285/35R22 29.9″ (759 mm) 1.6%
285/40R21 30″ (761 mm) 1.9%
295/30R23 30″ (762 mm) 2%
255/45R21 30″ (763 mm) 2.1%
255/40R22 30″ (763 mm) 2.1%
295/35R22 30.1″ (765 mm) 2.4%
295/40R21 30.3″ (769 mm) 2.9%

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