Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 255/40R17 Tires
Diameter
25"
Width
10"
Sidewall
4"
Circumference
78.6"
Revs per mile
806
Alternate Tire Sizes
17"
14"
15"
16"
18"
19"
20"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile