tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 235
Aspect Ratio: 30
Wheel Diameter: 18
Inches
Millimeters

Results for 235/30R18 Tires

disc wheel
Diameter
23.6"
tire width
Width
9.3"
disc wheel
Sidewall
2.8"
tire circumference
Circumference
74"
tire rpm
Revs per mile
857

Alternate Tire Sizes

18"
13"
14"
15"
16"
17"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
205/35R18
23,6"
0%
8,1"
2,8"
74,3"
853
Best fit
235/30R18
23,6"
0%
9,3"
2,8"
74,0"
857
Best fit
215/35R18
23,9"
1.26%
8,5"
3,0"
75,1"
843
225/35R18
24,2"
2.48%
8,9"
3,1"
76,0"
834