| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|
| Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Wheel Size 12
|
|||||||||||||
| 145 |
145/25-12
d=14.85
w=1.43
-59.81%
|
145/30-12
d=15.43
w=1.71
-58.26%
|
145/35-12
d=16.00
w=2.00
-56.72%
|
145/40-12
d=16.57
w=2.28
-55.17%
|
145/45-12
d=17.14
w=2.57
-53.63%
|
145/50-12
d=17.71
w=2.85
-52.08%
|
145/55-12
d=18.28
w=3.14
-50.54%
|
145/60-12
d=18.85
w=3.43
-48.99%
|
145/65-12
d=19.42
w=3.71
-47.45%
|
145/70-12
d=19.99
w=4.00
-45.90%
|
145/75-12
d=20.56
w=4.28
-44.36%
|
145/80-12
d=21.13
w=4.57
-42.81%
|
145/85-12
d=21.70
w=4.85
-41.27%
|
| 155 |
155/25-12
d=15.05
w=1.53
-59.27%
|
155/30-12
d=15.66
w=1.83
-57.62%
|
155/35-12
d=16.27
w=2.14
-55.97%
|
155/40-12
d=16.88
w=2.44
-54.32%
|
155/45-12
d=17.49
w=2.75
-52.67%
|
155/50-12
d=18.10
w=3.05
-51.02%
|
155/55-12
d=18.71
w=3.36
-49.37%
|
155/60-12
d=19.32
w=3.66
-47.71%
|
155/65-12
d=19.93
w=3.97
-46.06%
|
155/70-12
d=20.54
w=4.27
-44.41%
|
155/75-12
d=21.15
w=4.58
-42.76%
|
155/80-12
d=21.76
w=4.88
-41.11%
|
155/85-12
d=22.37
w=5.19
-39.46%
|
| 165 |
165/25-12
d=15.25
w=1.62
-58.74%
|
165/30-12
d=15.90
w=1.95
-56.98%
|
165/35-12
d=16.55
w=2.27
-55.23%
|
165/40-12
d=17.20
w=2.60
-53.47%
|
165/45-12
d=17.85
w=2.92
-51.71%
|
165/50-12
d=18.50
w=3.25
-49.95%
|
165/55-12
d=19.15
w=3.57
-48.19%
|
165/60-12
d=19.80
w=3.90
-46.44%
|
165/65-12
d=20.44
w=4.22
-44.68%
|
165/70-12
d=21.09
w=4.55
-42.92%
|
165/75-12
d=21.74
w=4.87
-41.16%
|
165/80-12
d=22.39
w=5.20
-39.41%
|
165/85-12
d=23.04
w=5.52
-37.65%
|
| 175 |
175/25-12
d=15.44
w=1.72
-58.21%
|
175/30-12
d=16.13
w=2.07
-56.34%
|
175/35-12
d=16.82
w=2.41
-54.48%
|
175/40-12
d=17.51
w=2.76
-52.62%
|
175/45-12
d=18.20
w=3.10
-50.75%
|
175/50-12
d=18.89
w=3.44
-48.89%
|
175/55-12
d=19.58
w=3.79
-47.02%
|
175/60-12
d=20.27
w=4.13
-45.16%
|
175/65-12
d=20.96
w=4.48
-43.29%
|
175/70-12
d=21.65
w=4.82
-41.43%
|
175/75-12
d=22.33
w=5.17
-39.57%
|
175/80-12
d=23.02
w=5.51
-37.70%
|
175/85-12
d=23.71
w=5.86
-35.84%
|
| 185 |
185/25-12
d=15.64
w=1.82
-57.68%
|
185/30-12
d=16.37
w=2.19
-55.70%
|
185/35-12
d=17.10
w=2.55
-53.73%
|
185/40-12
d=17.83
w=2.91
-51.76%
|
185/45-12
d=18.56
w=3.28
-49.79%
|
185/50-12
d=19.28
w=3.64
-47.82%
|
185/55-12
d=20.01
w=4.01
-45.85%
|
185/60-12
d=20.74
w=4.37
-43.88%
|
185/65-12
d=21.47
w=4.73
-41.91%
|
185/70-12
d=22.20
w=5.10
-39.94%
|
185/75-12
d=22.93
w=5.46
-37.97%
|
185/80-12
d=23.65
w=5.83
-36.00%
|
185/85-12
d=24.38
w=6.19
-34.03%
|
| 195 |
195/25-12
d=15.84
w=1.92
-57.14%
|
195/30-12
d=16.61
w=2.30
-55.07%
|
195/35-12
d=17.37
w=2.69
-52.99%
|
195/40-12
d=18.14
w=3.07
-50.91%
|
195/45-12
d=18.91
w=3.45
-48.83%
|
195/50-12
d=19.68
w=3.84
-46.76%
|
195/55-12
d=20.44
w=4.22
-44.68%
|
195/60-12
d=21.21
w=4.61
-42.60%
|
195/65-12
d=21.98
w=4.99
-40.52%
|
195/70-12
d=22.75
w=5.37
-38.45%
|
195/75-12
d=23.52
w=5.76
-36.37%
|
195/80-12
d=24.28
w=6.14
-34.29%
|
195/85-12
d=25.05
w=6.53
-32.21%
|
| 205 |
205/25-12
d=16.04
w=2.02
-56.61%
|
205/30-12
d=16.84
w=2.42
-54.43%
|
205/35-12
d=17.65
w=2.82
-52.24%
|
205/40-12
d=18.46
w=3.23
-50.06%
|
205/45-12
d=19.26
w=3.63
-47.87%
|
205/50-12
d=20.07
w=4.04
-45.69%
|
205/55-12
d=20.88
w=4.44
-43.51%
|
205/60-12
d=21.69
w=4.84
-41.32%
|
205/65-12
d=22.49
w=5.25
-39.14%
|
205/70-12
d=23.30
w=5.65
-36.96%
|
205/75-12
d=24.11
w=6.05
-34.77%
|
205/80-12
d=24.91
w=6.46
-32.59%
|
205/85-12
d=25.72
w=6.86
-30.40%
|
| 215 |
215/25-12
d=16.23
w=2.12
-56.08%
|
215/30-12
d=17.08
w=2.54
-53.79%
|
215/35-12
d=17.93
w=2.96
-51.50%
|
215/40-12
d=18.77
w=3.39
-49.21%
|
215/45-12
d=19.62
w=3.81
-46.92%
|
215/50-12
d=20.46
w=4.23
-44.63%
|
215/55-12
d=21.31
w=4.66
-42.34%
|
215/60-12
d=22.16
w=5.08
-40.04%
|
215/65-12
d=23.00
w=5.50
-37.75%
|
215/70-12
d=23.85
w=5.93
-35.46%
|
215/75-12
d=24.70
w=6.35
-33.17%
|
215/80-12
d=25.54
w=6.77
-30.88%
|
215/85-12
d=26.39
w=7.19
-28.59%
|
| 225 |
225/25-12
d=16.43
w=2.21
-55.54%
|
225/30-12
d=17.31
w=2.66
-53.15%
|
225/35-12
d=18.20
w=3.10
-50.75%
|
225/40-12
d=19.09
w=3.54
-48.35%
|
225/45-12
d=19.97
w=3.99
-45.96%
|
225/50-12
d=20.86
w=4.43
-43.56%
|
225/55-12
d=21.74
w=4.87
-41.16%
|
225/60-12
d=22.63
w=5.31
-38.77%
|
225/65-12
d=23.52
w=5.76
-36.37%
|
225/70-12
d=24.40
w=6.20
-33.97%
|
225/75-12
d=25.29
w=6.64
-31.58%
|
225/80-12
d=26.17
w=7.09
-29.18%
|
225/85-12
d=27.06
w=7.53
-26.78%
|
| 235 |
235/25-12
d=16.63
w=2.31
-55.01%
|
235/30-12
d=17.55
w=2.78
-52.51%
|
235/35-12
d=18.48
w=3.24
-50.01%
|
235/40-12
d=19.40
w=3.70
-47.50%
|
235/45-12
d=20.33
w=4.16
-45.00%
|
235/50-12
d=21.25
w=4.63
-42.49%
|
235/55-12
d=22.18
w=5.09
-39.99%
|
235/60-12
d=23.10
w=5.55
-37.49%
|
235/65-12
d=24.03
w=6.01
-34.98%
|
235/70-12
d=24.95
w=6.48
-32.48%
|
235/75-12
d=25.88
w=6.94
-29.98%
|
235/80-12
d=26.80
w=7.40
-27.47%
|
235/85-12
d=27.73
w=7.86
-24.97%
|
| 245 |
245/25-12
d=16.82
w=2.41
-54.48%
|
245/30-12
d=17.79
w=2.89
-51.87%
|
245/35-12
d=18.75
w=3.38
-49.26%
|
245/40-12
d=19.72
w=3.86
-46.65%
|
245/45-12
d=20.68
w=4.34
-44.04%
|
245/50-12
d=21.65
w=4.82
-41.43%
|
245/55-12
d=22.61
w=5.31
-38.82%
|
245/60-12
d=23.57
w=5.79
-36.21%
|
245/65-12
d=24.54
w=6.27
-33.60%
|
245/70-12
d=25.50
w=6.75
-30.99%
|
245/75-12
d=26.47
w=7.23
-28.38%
|
245/80-12
d=27.43
w=7.72
-25.77%
|
245/85-12
d=28.40
w=8.20
-23.16%
|
| 255 |
255/25-12
d=17.02
w=2.51
-53.95%
|
255/30-12
d=18.02
w=3.01
-51.23%
|
255/35-12
d=19.03
w=3.51
-48.51%
|
255/40-12
d=20.03
w=4.02
-45.80%
|
255/45-12
d=21.04
w=4.52
-43.08%
|
255/50-12
d=22.04
w=5.02
-40.36%
|
255/55-12
d=23.04
w=5.52
-37.65%
|
255/60-12
d=24.05
w=6.02
-34.93%
|
255/65-12
d=25.05
w=6.53
-32.21%
|
255/70-12
d=26.06
w=7.03
-29.50%
|
255/75-12
d=27.06
w=7.53
-26.78%
|
255/80-12
d=28.06
w=8.03
-24.07%
|
255/85-12
d=29.07
w=8.53
-21.35%
|
| 265 |
265/25-12
d=17.22
w=2.61
-53.41%
|
265/30-12
d=18.26
w=3.13
-50.59%
|
265/35-12
d=19.30
w=3.65
-47.77%
|
265/40-12
d=20.35
w=4.17
-44.95%
|
265/45-12
d=21.39
w=4.69
-42.12%
|
265/50-12
d=22.43
w=5.22
-39.30%
|
265/55-12
d=23.48
w=5.74
-36.48%
|
265/60-12
d=24.52
w=6.26
-33.65%
|
265/65-12
d=25.56
w=6.78
-30.83%
|
265/70-12
d=26.61
w=7.30
-28.01%
|
265/75-12
d=27.65
w=7.82
-25.18%
|
265/80-12
d=28.69
w=8.35
-22.36%
|
265/85-12
d=29.74
w=8.87
-19.54%
|
| 275 |
275/25-12
d=17.41
w=2.71
-52.88%
|
275/30-12
d=18.50
w=3.25
-49.95%
|
275/35-12
d=19.58
w=3.79
-47.02%
|
275/40-12
d=20.66
w=4.33
-44.09%
|
275/45-12
d=21.74
w=4.87
-41.16%
|
275/50-12
d=22.83
w=5.41
-38.23%
|
275/55-12
d=23.91
w=5.95
-35.30%
|
275/60-12
d=24.99
w=6.50
-32.37%
|
275/65-12
d=26.07
w=7.04
-29.44%
|
275/70-12
d=27.16
w=7.58
-26.52%
|
275/75-12
d=28.24
w=8.12
-23.59%
|
275/80-12
d=29.32
w=8.66
-20.66%
|
275/85-12
d=30.41
w=9.20
-17.73%
|
| 285 |
285/25-12
d=17.61
w=2.81
-52.35%
|
285/30-12
d=18.73
w=3.37
-49.31%
|
285/35-12
d=19.85
w=3.93
-46.28%
|
285/40-12
d=20.98
w=4.49
-43.24%
|
285/45-12
d=22.10
w=5.05
-40.20%
|
285/50-12
d=23.22
w=5.61
-37.17%
|
285/55-12
d=24.34
w=6.17
-34.13%
|
285/60-12
d=25.46
w=6.73
-31.10%
|
285/65-12
d=26.59
w=7.29
-28.06%
|
285/70-12
d=27.71
w=7.85
-25.02%
|
285/75-12
d=28.83
w=8.42
-21.99%
|
285/80-12
d=29.95
w=8.98
-18.95%
|
285/85-12
d=31.07
w=9.54
-15.92%
|
| 295 |
295/25-12
d=17.81
w=2.90
-51.82%
|
295/30-12
d=18.97
w=3.48
-48.67%
|
295/35-12
d=20.13
w=4.06
-45.53%
|
295/40-12
d=21.29
w=4.65
-42.39%
|
295/45-12
d=22.45
w=5.23
-39.25%
|
295/50-12
d=23.61
w=5.81
-36.10%
|
295/55-12
d=24.78
w=6.39
-32.96%
|
295/60-12
d=25.94
w=6.97
-29.82%
|
295/65-12
d=27.10
w=7.55
-26.68%
|
295/70-12
d=28.26
w=8.13
-23.53%
|
295/75-12
d=29.42
w=8.71
-20.39%
|
295/80-12
d=30.58
w=9.29
-17.25%
|
295/85-12
d=31.74
w=9.87
-14.10%
|
| 305 |
305/25-12
d=18.00
w=3.00
-51.28%
|
305/30-12
d=19.20
w=3.60
-48.03%
|
305/35-12
d=20.41
w=4.20
-44.79%
|
305/40-12
d=21.61
w=4.80
-41.54%
|
305/45-12
d=22.81
w=5.40
-38.29%
|
305/50-12
d=24.01
w=6.00
-35.04%
|
305/55-12
d=25.21
w=6.60
-31.79%
|
305/60-12
d=26.41
w=7.20
-28.54%
|
305/65-12
d=27.61
w=7.81
-25.29%
|
305/70-12
d=28.81
w=8.41
-22.04%
|
305/75-12
d=30.01
w=9.01
-18.79%
|
305/80-12
d=31.21
w=9.61
-15.54%
|
305/85-12
d=32.41
w=10.21
-12.29%
|
| 315 |
315/25-12
d=18.20
w=3.10
-50.75%
|
315/30-12
d=19.44
w=3.72
-47.40%
|
315/35-12
d=20.68
w=4.34
-44.04%
|
315/40-12
d=21.92
w=4.96
-40.68%
|
315/45-12
d=23.16
w=5.58
-37.33%
|
315/50-12
d=24.40
w=6.20
-33.97%
|
315/55-12
d=25.64
w=6.82
-30.62%
|
315/60-12
d=26.88
w=7.44
-27.26%
|
315/65-12
d=28.12
w=8.06
-23.91%
|
315/70-12
d=29.36
w=8.68
-20.55%
|
315/75-12
d=30.60
w=9.30
-17.19%
|
315/80-12
d=31.84
w=9.92
-13.84%
|
315/85-12
d=33.08
w=10.54
-10.48%
|
| 325 |
325/25-12
d=18.40
w=3.20
-50.22%
|
325/30-12
d=19.68
w=3.84
-46.76%
|
325/35-12
d=20.96
w=4.48
-43.29%
|
325/40-12
d=22.24
w=5.12
-39.83%
|
325/45-12
d=23.52
w=5.76
-36.37%
|
325/50-12
d=24.80
w=6.40
-32.91%
|
325/55-12
d=26.07
w=7.04
-29.44%
|
325/60-12
d=27.35
w=7.68
-25.98%
|
325/65-12
d=28.63
w=8.32
-22.52%
|
325/70-12
d=29.91
w=8.96
-19.06%
|
325/75-12
d=31.19
w=9.60
-15.60%
|
325/80-12
d=32.47
w=10.24
-12.13%
|
325/85-12
d=33.75
w=10.88
-8.67%
|
| 335 |
335/25-12
d=18.59
w=3.30
-49.69%
|
335/30-12
d=19.91
w=3.96
-46.12%
|
335/35-12
d=21.23
w=4.62
-42.55%
|
335/40-12
d=22.55
w=5.28
-38.98%
|
335/45-12
d=23.87
w=5.94
-35.41%
|
335/50-12
d=25.19
w=6.59
-31.84%
|
335/55-12
d=26.51
w=7.25
-28.27%
|
335/60-12
d=27.83
w=7.91
-24.70%
|
335/65-12
d=29.15
w=8.57
-21.14%
|
335/70-12
d=30.46
w=9.23
-17.57%
|
335/75-12
d=31.78
w=9.89
-14.00%
|
335/80-12
d=33.10
w=10.55
-10.43%
|
335/85-12
d=34.42
w=11.21
-6.86%
|
|
Wheel Size 13
|
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Wheel Size 14
|
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Wheel Size 15
|
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|
Wheel Size 16
|
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|
Wheel Size 16.5
|
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|
Wheel Size 17
|
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|
Wheel Size 18
|
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|
Wheel Size 19
|
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|
Wheel Size 20
|
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|
Wheel Size 21
|
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The information on this page is intended to be helpful, but there is absolutely no guarantee of its accuracy, safety, or applicability for any particular use. The data is calculated mathematically, not taken from any official or recommended guide.
Please excercise a common sense, follow manufacturer and dealer recommendations, and check with other sources.
Tires are a safety equipment, don't take their selection lightly!