Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 225/40R20 Tires
Diameter
27.1"
Width
8.9"
Sidewall
3.5"
Circumference
85.1"
Revs per mile
745
Alternate Tire Sizes
20"
14"
15"
16"
17"
18"
19"
21"
22"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile