tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 255
Aspect Ratio: 40
Wheel Diameter: 20
Inches
Millimeters

Results for 255/40R20 Tires

disc wheel
Diameter
28"
tire width
Width
10"
disc wheel
Sidewall
4"
tire circumference
Circumference
88"
tire rpm
Revs per mile
720

Alternate Tire Sizes

20"
14"
15"
16"
17"
18"
19"
21"
22"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
305/30R20
27,2"
-2.94%
12,0"
3,6"
85,4"
742
265/35R20
27,3"
-2.56%
10,4"
3,7"
85,7"
739
155/60R20
27,3"
-2.56%
6,1"
3,7"
85,8"
739
315/30R20
27,4"
-2.19%
12,4"
3,7"
86,2"
735
235/40R20
27,4"
-2.19%
9,3"
3,7"
86,0"
736
215/45R20
27,6"
-1.45%
8,5"
3,8"
86,7"
731
275/35R20
27,6"
-1.45%
10,8"
3,8"
86,6"
732
175/55R20
27,6"
-1.45%
6,9"
3,8"
86,6"
732
325/30R20
27,7"
-1.08%
12,8"
3,8"
86,9"
729
195/50R20
27,7"
-1.08%
7,7"
3,8"
86,9"
729
245/40R20
27,7"
-1.08%
9,6"
3,9"
87,0"
728
335/30R20
27,9"
-0.36%
13,2"
4,0"
87,6"
723
Best fit
285/35R20
27,9"
-0.36%
11,2"
3,9"
87,5"
724
Best fit
255/40R20
28,0"
0%
10,0"
4,0"
88,0"
720
Best fit
345/30R20
28,1"
0.36%
13,6"
4,1"
88,4"
717
Best fit
295/35R20
28,1"
0.36%
11,6"
4,1"
88,3"
717
Best fit
265/40R20
28,3"
1.06%
10,4"
4,2"
89,0"
712
235/45R20
28,3"
1.06%
9,3"
4,2"
88,9"
712
195/55R20
28,4"
1.41%
7,7"
4,2"
89,3"
709
305/35R20
28,4"
1.41%
12,0"
4,2"
89,2"
710
245/45R20
28,7"
2.44%
9,6"
4,3"
90,1"
704
315/35R20
28,7"
2.44%
12,4"
4,3"
90,1"
704
275/40R20
28,7"
2.44%
10,8"
4,3"
90,0"
704