Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 235/30R20 Tires
Diameter
25.6"
Width
9.3"
Sidewall
2.8"
Circumference
80.2"
Revs per mile
790
Alternate Tire Sizes
20"
14"
15"
16"
17"
18"
19"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile