305/35R21 Tires

305/35R21 Conversion

When converted to inches, 305/35R21 is equivalent to 29.4x12R21.

305/35R21 tire has a section width of 12 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 21 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 4.2 inches (107 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 29.4 inches (747 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 92.3 inches (2345.6 mm) is the outer perimeter of the tire. Tire revolutions indicate the number of times a tire revolves while it covers the distance in miles or kilometers. 305/35R21 tire makes 686 revolutions per mile (426 revolutions per kilometer).

305/35R21 Section Width
12"
29.4"
305/35R21 Tire Side
Tire Circumference
92.3"
21"
4.2"
686 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 747 mm 29.4"
Tread Width 305 mm 12"
Rim Diameter 533.4 mm 21"
Sidewall Height 107 mm 4.2"
Circumference 2345.6 mm 92.3"
Revolutions 426 per km 686 per mile

305/35R21 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 305/35R21 tire can be replaced with 30 compatible tire sizes. Select optional plus size to see its specs.

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%