Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 235/40R20 Tires
Diameter
27.4"
Width
9.3"
Sidewall
3.7"
Circumference
86"
Revs per mile
736
Alternate Tire Sizes
20"
14"
15"
16"
17"
18"
19"
21"
22"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile