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Tyre Size Calculator
Use this page to work out the radius, circumference and diameter of any size tyre. You can also run comparisons between different tyres and work out the differences in size and odometer corrections. The formulas will also show you the matching ExplorOz Wheel covers that match your tyres.
Article By: ExplorOz Team - David Updated: 16 Dec 2008
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Metric Tyre Size Calculator
Select Wheel/Tyre
145
150
155
165
175
185
190
195
205
215
225
230
235
240
245
255
265
275
285
295
305
315
325
335
395
/
25
30
35
40
45
50
55
60
65
70
75
80
82
85
100
R
12
13
14
15
15.5
16
16.5
17
18
19
19.5
20
21
22
23
24
Imperial Tyre Size Calculator
Select Wheel/Tyre
x
12
13
14
15
15.5
16
16.5
17
18
19
19.5
20
21
22
23
24
Imperial LT Tyre Size Calculator
Select Wheel/Tyre
x
R
12
13
14
15
15.5
16
16.5
17
18
19
19.5
20
21
22
23
24
Tyre Difference Comparision
Select Wheel/Tyre 1
145
150
155
165
175
185
190
195
205
215
225
230
235
240
245
255
265
275
285
295
305
315
325
335
395
/
25
30
35
40
45
50
55
60
65
70
75
80
82
85
100
R
12
13
14
15
15.5
16
16.5
17
18
19
19.5
20
21
22
23
24
Select Wheel/Tyre 2
145
150
155
165
175
185
190
195
205
215
225
230
235
245
255
265
275
285
295
305
315
325
335
395
/
25
30
35
40
45
50
55
60
65
70
75
80
82
85
100
R
12
13
14
15
15.5
16
16.5
17
18
19
19.5
20
21
22
23
24
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