~ Tyre Size Calculator ~
This should be of some use to somebody, after all, we all need wheels.
Choose your Tyre Sizes and it works it all out for you - Easy.
Original Tyre
Size
Width
Height
Diameter
Overall Tyre Diameter
325
315
305
295
285
275
265
255
245
235
225
215
205
195
185
175
165
155
145
mm
85
80
75
70
65
60
55
50
45
40
35
30
%
21
20
19
18
17
16
15
14
13
12
10
Inches
Inches
mm
New
Tyre
Size
325
315
305
295
285
275
265
255
245
235
225
215
205
195
185
175
165
155
145
mm
85
80
75
70
65
60
55
50
45
40
35
30
%
21
20
19
18
17
16
15
14
13
12
10
Inches
Inches
mm
Difference in Diameter =
% Actual =
mm
