Tire Size Calculator
This calculator will calculate tire diameter (height)
from the standard information given on the sidewall: width, aspect ratio, and wheel size.
Tire width (mm):
145
155
165
175
185
195
205
215
225
235
245
255
265
275
285
295
305
315
325
335
345
355
365
375
385
395
400
Aspect ratio:
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
Wheel size (inches):
11
12
13
14
15
16
17
18
19
20
21
22
Tire diameter (inches) =
Tire section width (inches) =
Tire sidewall (inches) =