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Tyres
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.
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
Calculate
Results for tyre
Rolling Radius
mm
Circumference
mm
Diameter
mm
Wheel Cover Size
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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
Calculate
Results for tyre
Metric Equivalent
Rolling Radius
mm
Circumference
mm
Diameter
mm
Wheel Cover Size
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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
Calculate
Results for tyre
Metric Equivalent
Rolling Radius
mm
Circumference
mm
Diameter
mm
Wheel Cover Size
Tyre Size Difference Comparison
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
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
Calculate
Results for tyre
Rolling Radius
mm
Circumference
mm
Diameter
mm
Wheel Cover Size
Results for tyre
Rolling Radius
mm
Circumference
mm
Diameter
mm
Wheel Cover Size
Differences between Wheel/Tyre 1 & 2
Rolling Radius
mm
Circumference
mm
Diameter
mm
When your speedo reads 100km/hr you're actually at
km/hr
Related Pages
All Terrain (AT) Tyres
Highway Terrain (HT) Tyres
Mud Terrain (MT) Tyres
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Page Stats
Article By:
ExplorOz Team - David
Created: August 2007
Revised: October 2017
Latest Feedback: May 2020
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