Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 185/55R15 Tires
Diameter
23"
Width
7.3"
Sidewall
4"
Circumference
72.3"
Revs per mile
877
Alternate Tire Sizes
15"
13"
14"
16"
17"
18"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile