tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 255
Aspect Ratio: 40
Wheel Diameter: 18
Inches
Millimeters

Results for 255/40R18 Tires

disc wheel
Diameter
26"
tire width
Width
10"
disc wheel
Sidewall
4"
tire circumference
Circumference
81.7"
tire rpm
Revs per mile
775

Alternate Tire Sizes

18"
14"
15"
16"
17"
19"
20"
21"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
265/35R18
25,3"
-2.77%
10,4"
3,7"
79,5"
798
205/45R18
25,3"
-2.77%
8,1"
3,6"
79,3"
799
315/30R18
25,4"
-2.36%
12,4"
3,7"
79,9"
793
235/40R18
25,4"
-2.36%
9,3"
3,7"
79,8"
794
275/35R18
25,6"
-1.56%
10,8"
3,8"
80,3"
789
215/45R18
25,6"
-1.56%
8,5"
3,8"
80,4"
788
245/40R18
25,7"
-1.17%
9,6"
3,9"
80,7"
785
285/35R18
25,9"
-0.39%
11,2"
3,9"
81,2"
781
Best fit
335/30R18
25,9"
-0.39%
13,2"
4,0"
81,4"
779
Best fit
225/45R18
26,0"
0%
8,9"
4,0"
81,6"
777
Best fit
255/40R18
26,0"
0%
10,0"
4,0"
81,7"
775
Best fit
295/35R18
26,1"
0.38%
11,6"
4,1"
82,0"
772
Best fit
175/60R18
26,3"
1.14%
6,9"
4,1"
82,5"
768
235/45R18
26,3"
1.14%
9,3"
4,2"
82,7"
767
265/40R18
26,3"
1.14%
10,4"
4,2"
82,7"
766
195/55R18
26,4"
1.52%
7,7"
4,2"
83,0"
763
305/35R18
26,4"
1.52%
12,0"
4,2"
82,9"
764
215/50R18
26,5"
1.89%
8,5"
4,2"
83,1"
763
315/35R18
26,7"
2.62%
12,4"
4,3"
83,8"
756
245/45R18
26,7"
2.62%
9,6"
4,3"
83,8"
756
275/40R18
26,7"
2.62%
10,8"
4,3"
83,7"
757