Tire Size Calculator
Calculate tire sizes in inches or millimeters and find alternative sizes.
Inches
Millimeters
Results for 245/50R18 Tires
Diameter
27.6"
Width
9.6"
Sidewall
4.8"
Circumference
86.8"
Revs per mile
730
Alternate Tire Sizes
18"
14"
15"
16"
17"
19"
20"
21"
22"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile