tire

Tire Size Calculator

Calculate tire sizes in inches or millimeters and find alternative sizes.
Tread Width: 275
Aspect Ratio: 50
Wheel Diameter: 21
Inches
Millimeters

Results for 275/50R21 Tires

disc wheel
Diameter
31.8"
tire width
Width
10.8"
disc wheel
Sidewall
5.4"
tire circumference
Circumference
99.9"
tire rpm
Revs per mile
634

Alternate Tire Sizes

21"
16"
17"
18"
19"
20"
22"
23"
24"
Tire Size
Diameter
Width
Sidewall
Circumference
Revs per mile
315/40R21
30,9"
-2.91%
12,4"
5,0"
97,1"
653
255/50R21
31,0"
-2.58%
10,0"
5,0"
97,5"
650
285/45R21
31,1"
-2.25%
11,2"
5,0"
97,6"
649
325/40R21
31,2"
-1.92%
12,8"
5,1"
98,1"
646
275/50R21
31,8"
0%
10,8"
5,4"
99,9"
634
Best fit
315/45R21
32,2"
1.24%
12,4"
5,6"
101,0"
627