tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 325
Aspect Ratio: 25
Wheel Diameter: 21
Inches
Millimeters

Results for 325/25R21 Tires

disc wheel
Diameter
27.4"
tire width
Width
12.8"
disc wheel
Sidewall
3.2"
tire circumference
Circumference
86"
tire rpm
Revs per mile
736

Alternate Tire Sizes

21"
14"
15"
16"
17"
18"
19"
20"
22"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
235/30R21
26,6"
-3.01%
9,3"
2,8"
83,4"
760
295/25R21
26,8"
-2.24%
11,6"
2,9"
84,2"
753
245/30R21
26,8"
-2.24%
9,6"
2,9"
84,1"
753
255/30R21
27,0"
-1.48%
10,0"
3,0"
84,9"
747
305/25R21
27,0"
-1.48%
12,0"
3,0"
84,8"
747
265/30R21
27,3"
-0.37%
10,4"
3,1"
85,6"
740
Best fit
325/25R21
27,4"
0%
12,8"
3,2"
86,0"
737
Best fit
275/30R21
27,5"
0.36%
10,8"
3,2"
86,3"
734
Best fit
285/30R21
27,7"
1.08%
11,2"
3,4"
87,1"
728
345/25R21
27,8"
1.44%
13,6"
3,4"
87,3"
726
245/35R21
27,8"
1.44%
9,6"
3,4"
87,1"
727
255/35R21
28,0"
2.14%
10,0"
3,5"
88,0"
720
295/30R21
28,0"
2.14%
11,6"
3,5"
87,8"
722
355/25R21
28,0"
2.14%
14,0"
3,5"
87,9"
721
305/30R21
28,2"
2.84%
12,0"
3,6"
88,6"
715