tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 315
Aspect Ratio: 30
Wheel Diameter: 18
Inches
Millimeters

Results for 315/30R18 Tires

disc wheel
Diameter
25.4"
tire width
Width
12.4"
disc wheel
Sidewall
3.7"
tire circumference
Circumference
79.9"
tire rpm
Revs per mile
793

Alternate Tire Sizes

18"
14"
15"
16"
17"
19"
20"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
285/30R18
24,7"
-2.83%
11,2"
3,4"
77,7"
816
245/35R18
24,8"
-2.42%
9,6"
3,4"
77,7"
815
215/40R18
24,8"
-2.42%
8,5"
3,4"
77,8"
815
195/45R18
24,9"
-2.01%
7,7"
3,5"
78,2"
810
295/30R18
25,0"
-1.6%
11,6"
3,5"
78,4"
808
255/35R18
25,0"
-1.6%
10,0"
3,5"
78,6"
806
225/40R18
25,1"
-1.2%
8,9"
3,5"
78,8"
804
265/35R18
25,3"
-0.4%
10,4"
3,7"
79,5"
798
Best fit
205/45R18
25,3"
-0.4%
8,1"
3,6"
79,3"
799
Best fit
235/40R18
25,4"
0%
9,3"
3,7"
79,8"
794
Best fit
315/30R18
25,4"
0%
12,4"
3,7"
79,9"
793
Best fit
275/35R18
25,6"
0.78%
10,8"
3,8"
80,3"
789
Best fit
215/45R18
25,6"
0.78%
8,5"
3,8"
80,4"
788
Best fit
245/40R18
25,7"
1.17%
9,6"
3,9"
80,7"
785
335/30R18
25,9"
1.93%
13,2"
4,0"
81,4"
779
285/35R18
25,9"
1.93%
11,2"
3,9"
81,2"
781
225/45R18
26,0"
2.31%
8,9"
4,0"
81,6"
777
255/40R18
26,0"
2.31%
10,0"
4,0"
81,7"
775
295/35R18
26,1"
2.68%
11,6"
4,1"
82,0"
772