tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 255
Aspect Ratio: 45
Wheel Diameter: 20
Inches
Millimeters

Results for 255/45R20 Tires

disc wheel
Diameter
29"
tire width
Width
10"
disc wheel
Sidewall
4.5"
tire circumference
Circumference
91.2"
tire rpm
Revs per mile
695

Alternate Tire Sizes

20"
15"
16"
17"
18"
19"
21"
22"
23"
24"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
235/45R20
28,3"
-2.47%
9,3"
4,2"
88,9"
712
265/40R20
28,3"
-2.47%
10,4"
4,2"
89,0"
712
195/55R20
28,4"
-2.11%
7,7"
4,2"
89,3"
709
305/35R20
28,4"
-2.11%
12,0"
4,2"
89,2"
710
275/40R20
28,7"
-1.05%
10,8"
4,3"
90,0"
704
245/45R20
28,7"
-1.05%
9,6"
4,3"
90,1"
704
315/35R20
28,7"
-1.05%
12,4"
4,3"
90,1"
704
255/45R20
29,0"
0%
10,0"
4,5"
91,2"
695
Best fit
325/35R20
29,0"
0%
12,8"
4,5"
90,9"
697
Best fit
285/40R20
29,0"
0%
11,2"
4,5"
91,0"
696
Best fit
235/50R20
29,3"
1.02%
9,3"
4,6"
91,9"
690
295/40R20
29,3"
1.02%
11,6"
4,6"
92,0"
689
265/45R20
29,4"
1.36%
10,4"
4,7"
92,3"
687
305/40R20
29,6"
2.03%
12,0"
4,8"
93,0"
682
245/50R20
29,6"
2.03%
9,6"
4,8"
93,1"
681
275/45R20
29,7"
2.36%
10,8"
4,9"
93,4"
678