Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 255/75R15 Tires
Diameter
30.1"
Width
10"
Sidewall
7.5"
Circumference
94.4"
Revs per mile
671
Alternate Tire Sizes
15"
16"
17"
18"
19"
20"
21"
22"
23"
24"