Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
---|---|---|---|---|---|---|
305/40-12 | -0.72 % | 49.64 | 1,007.24 | 21.61 | 4.80 | 122.00 |
315/40-12 | +0.72 % | 50.36 | 992.76 | 21.92 | 4.96 | 126.00 |
275/45-12 | -0.09 % | 49.95 | 1,000.90 | 21.74 | 4.87 | 123.75 |
285/45-12 | +1.54 % | 50.77 | 984.62 | 22.10 | 5.05 | 128.25 |
265/45-12 | -1.72 % | 49.14 | 1,017.19 | 21.39 | 4.69 | 119.25 |
245/50-12 | -0.54 % | 49.73 | 1,005.43 | 21.65 | 4.82 | 122.50 |
255/50-12 | +1.27 % | 50.63 | 987.34 | 22.04 | 5.02 | 127.50 |
225/55-12 | -0.09 % | 49.95 | 1,000.90 | 21.74 | 4.87 | 123.75 |
235/55-12 | +1.90 % | 50.95 | 981.01 | 22.18 | 5.09 | 129.25 |
205/60-12 | -0.36 % | 49.82 | 1,003.62 | 21.69 | 4.84 | 123.00 |
215/60-12 | +1.81 % | 50.90 | 981.91 | 22.16 | 5.08 | 129.00 |
195/65-12 | +0.99 % | 50.50 | 990.05 | 21.98 | 4.99 | 126.75 |
185/65-12 | -1.36 % | 49.32 | 1,013.57 | 21.47 | 4.73 | 120.25 |
175/70-12 | -0.54 % | 49.73 | 1,005.43 | 21.65 | 4.82 | 122.50 |
185/70-12 | +1.99 % | 50.99 | 980.10 | 22.20 | 5.10 | 129.50 |
165/75-12 | -0.09 % | 49.95 | 1,000.90 | 21.74 | 4.87 | 123.75 |
155/80-12 | 0.00 % | 50.00 | 1,000.00 | 21.76 | 4.88 | 124.00 |
145/85-12 | -0.27 % | 49.86 | 1,002.71 | 21.70 | 4.85 | 123.25 |
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
-31.75%
|
145/30-12
d=15.43
w=1.71
-29.12%
|
145/35-12
d=16.00
w=2.00
-26.50%
|
145/40-12
d=16.57
w=2.28
-23.88%
|
145/45-12
d=17.14
w=2.57
-21.26%
|
145/50-12
d=17.71
w=2.85
-18.63%
|
145/55-12
d=18.28
w=3.14
-16.01%
|
145/60-12
d=18.85
w=3.43
-13.39%
|
145/65-12
d=19.42
w=3.71
-10.76%
|
145/70-12
d=19.99
w=4.00
-8.14%
|
145/75-12
d=20.56
w=4.28
-5.52%
|
145/80-12
d=21.13
w=4.57
-2.89%
|
145/85-12
d=21.70
w=4.85
-0.27%
|
155 |
155/25-12
d=15.05
w=1.53
-30.84%
|
155/30-12
d=15.66
w=1.83
-28.04%
|
155/35-12
d=16.27
w=2.14
-25.24%
|
155/40-12
d=16.88
w=2.44
-22.43%
|
155/45-12
d=17.49
w=2.75
-19.63%
|
155/50-12
d=18.10
w=3.05
-16.82%
|
155/55-12
d=18.71
w=3.36
-14.02%
|
155/60-12
d=19.32
w=3.66
-11.22%
|
155/65-12
d=19.93
w=3.97
-8.41%
|
155/70-12
d=20.54
w=4.27
-5.61%
|
155/75-12
d=21.15
w=4.58
-2.80%
|
155/80-12
d=21.76
w=4.88
0.00%
|
155/85-12
d=22.37
w=5.19
+2.80%
|
165 |
165/25-12
d=15.25
w=1.62
-29.94%
|
165/30-12
d=15.90
w=1.95
-26.95%
|
165/35-12
d=16.55
w=2.27
-23.97%
|
165/40-12
d=17.20
w=2.60
-20.98%
|
165/45-12
d=17.85
w=2.92
-18.00%
|
165/50-12
d=18.50
w=3.25
-15.01%
|
165/55-12
d=19.15
w=3.57
-12.03%
|
165/60-12
d=19.80
w=3.90
-9.04%
|
165/65-12
d=20.44
w=4.22
-6.06%
|
165/70-12
d=21.09
w=4.55
-3.08%
|
165/75-12
d=21.74
w=4.87
-0.09%
|
165/80-12
d=22.39
w=5.20
+2.89%
|
165/85-12
d=23.04
w=5.52
+5.88%
|
175 |
175/25-12
d=15.44
w=1.72
-29.03%
|
175/30-12
d=16.13
w=2.07
-25.87%
|
175/35-12
d=16.82
w=2.41
-22.70%
|
175/40-12
d=17.51
w=2.76
-19.54%
|
175/45-12
d=18.20
w=3.10
-16.37%
|
175/50-12
d=18.89
w=3.44
-13.21%
|
175/55-12
d=19.58
w=3.79
-10.04%
|
175/60-12
d=20.27
w=4.13
-6.87%
|
175/65-12
d=20.96
w=4.48
-3.71%
|
175/70-12
d=21.65
w=4.82
-0.54%
|
175/75-12
d=22.33
w=5.17
+2.62%
|
175/80-12
d=23.02
w=5.51
+5.79%
|
175/85-12
d=23.71
w=5.86
+8.95%
|
185 |
185/25-12
d=15.64
w=1.82
-28.13%
|
185/30-12
d=16.37
w=2.19
-24.78%
|
185/35-12
d=17.10
w=2.55
-21.44%
|
185/40-12
d=17.83
w=2.91
-18.09%
|
185/45-12
d=18.56
w=3.28
-14.74%
|
185/50-12
d=19.28
w=3.64
-11.40%
|
185/55-12
d=20.01
w=4.01
-8.05%
|
185/60-12
d=20.74
w=4.37
-4.70%
|
185/65-12
d=21.47
w=4.73
-1.36%
|
185/70-12
d=22.20
w=5.10
+1.99%
|
185/75-12
d=22.93
w=5.46
+5.34%
|
185/80-12
d=23.65
w=5.83
+8.68%
|
185/85-12
d=24.38
w=6.19
+12.03%
|
195 |
195/25-12
d=15.84
w=1.92
-27.23%
|
195/30-12
d=16.61
w=2.30
-23.70%
|
195/35-12
d=17.37
w=2.69
-20.17%
|
195/40-12
d=18.14
w=3.07
-16.64%
|
195/45-12
d=18.91
w=3.45
-13.12%
|
195/50-12
d=19.68
w=3.84
-9.59%
|
195/55-12
d=20.44
w=4.22
-6.06%
|
195/60-12
d=21.21
w=4.61
-2.53%
|
195/65-12
d=21.98
w=4.99
+0.99%
|
195/70-12
d=22.75
w=5.37
+4.52%
|
195/75-12
d=23.52
w=5.76
+8.05%
|
195/80-12
d=24.28
w=6.14
+11.58%
|
195/85-12
d=25.05
w=6.53
+15.10%
|
205 |
205/25-12
d=16.04
w=2.02
-26.32%
|
205/30-12
d=16.84
w=2.42
-22.61%
|
205/35-12
d=17.65
w=2.82
-18.90%
|
205/40-12
d=18.46
w=3.23
-15.20%
|
205/45-12
d=19.26
w=3.63
-11.49%
|
205/50-12
d=20.07
w=4.04
-7.78%
|
205/55-12
d=20.88
w=4.44
-4.07%
|
205/60-12
d=21.69
w=4.84
-0.36%
|
205/65-12
d=22.49
w=5.25
+3.35%
|
205/70-12
d=23.30
w=5.65
+7.05%
|
205/75-12
d=24.11
w=6.05
+10.76%
|
205/80-12
d=24.91
w=6.46
+14.47%
|
205/85-12
d=25.72
w=6.86
+18.18%
|
215 |
215/25-12
d=16.23
w=2.12
-25.42%
|
215/30-12
d=17.08
w=2.54
-21.53%
|
215/35-12
d=17.93
w=2.96
-17.64%
|
215/40-12
d=18.77
w=3.39
-13.75%
|
215/45-12
d=19.62
w=3.81
-9.86%
|
215/50-12
d=20.46
w=4.23
-5.97%
|
215/55-12
d=21.31
w=4.66
-2.08%
|
215/60-12
d=22.16
w=5.08
+1.81%
|
215/65-12
d=23.00
w=5.50
+5.70%
|
215/70-12
d=23.85
w=5.93
+9.59%
|
215/75-12
d=24.70
w=6.35
+13.48%
|
215/80-12
d=25.54
w=6.77
+17.37%
|
215/85-12
d=26.39
w=7.19
+21.26%
|
225 |
225/25-12
d=16.43
w=2.21
-24.51%
|
225/30-12
d=17.31
w=2.66
-20.44%
|
225/35-12
d=18.20
w=3.10
-16.37%
|
225/40-12
d=19.09
w=3.54
-12.30%
|
225/45-12
d=19.97
w=3.99
-8.23%
|
225/50-12
d=20.86
w=4.43
-4.16%
|
225/55-12
d=21.74
w=4.87
-0.09%
|
225/60-12
d=22.63
w=5.31
+3.98%
|
225/65-12
d=23.52
w=5.76
+8.05%
|
225/70-12
d=24.40
w=6.20
+12.12%
|
225/75-12
d=25.29
w=6.64
+16.19%
|
225/80-12
d=26.17
w=7.09
+20.26%
|
225/85-12
d=27.06
w=7.53
+24.33%
|
235 |
235/25-12
d=16.63
w=2.31
-23.61%
|
235/30-12
d=17.55
w=2.78
-19.36%
|
235/35-12
d=18.48
w=3.24
-15.10%
|
235/40-12
d=19.40
w=3.70
-10.85%
|
235/45-12
d=20.33
w=4.16
-6.60%
|
235/50-12
d=21.25
w=4.63
-2.35%
|
235/55-12
d=22.18
w=5.09
+1.90%
|
235/60-12
d=23.10
w=5.55
+6.15%
|
235/65-12
d=24.03
w=6.01
+10.40%
|
235/70-12
d=24.95
w=6.48
+14.65%
|
235/75-12
d=25.88
w=6.94
+18.90%
|
235/80-12
d=26.80
w=7.40
+23.15%
|
235/85-12
d=27.73
w=7.86
+27.41%
|
245 |
245/25-12
d=16.82
w=2.41
-22.70%
|
245/30-12
d=17.79
w=2.89
-18.27%
|
245/35-12
d=18.75
w=3.38
-13.84%
|
245/40-12
d=19.72
w=3.86
-9.41%
|
245/45-12
d=20.68
w=4.34
-4.97%
|
245/50-12
d=21.65
w=4.82
-0.54%
|
245/55-12
d=22.61
w=5.31
+3.89%
|
245/60-12
d=23.57
w=5.79
+8.32%
|
245/65-12
d=24.54
w=6.27
+12.75%
|
245/70-12
d=25.50
w=6.75
+17.19%
|
245/75-12
d=26.47
w=7.23
+21.62%
|
245/80-12
d=27.43
w=7.72
+26.05%
|
245/85-12
d=28.40
w=8.20
+30.48%
|
255 |
255/25-12
d=17.02
w=2.51
-21.80%
|
255/30-12
d=18.02
w=3.01
-17.19%
|
255/35-12
d=19.03
w=3.51
-12.57%
|
255/40-12
d=20.03
w=4.02
-7.96%
|
255/45-12
d=21.04
w=4.52
-3.35%
|
255/50-12
d=22.04
w=5.02
+1.27%
|
255/55-12
d=23.04
w=5.52
+5.88%
|
255/60-12
d=24.05
w=6.02
+10.49%
|
255/65-12
d=25.05
w=6.53
+15.10%
|
255/70-12
d=26.06
w=7.03
+19.72%
|
255/75-12
d=27.06
w=7.53
+24.33%
|
255/80-12
d=28.06
w=8.03
+28.94%
|
255/85-12
d=29.07
w=8.53
+33.56%
|
265 |
265/25-12
d=17.22
w=2.61
-20.89%
|
265/30-12
d=18.26
w=3.13
-16.10%
|
265/35-12
d=19.30
w=3.65
-11.31%
|
265/40-12
d=20.35
w=4.17
-6.51%
|
265/45-12
d=21.39
w=4.69
-1.72%
|
265/50-12
d=22.43
w=5.22
+3.08%
|
265/55-12
d=23.48
w=5.74
+7.87%
|
265/60-12
d=24.52
w=6.26
+12.66%
|
265/65-12
d=25.56
w=6.78
+17.46%
|
265/70-12
d=26.61
w=7.30
+22.25%
|
265/75-12
d=27.65
w=7.82
+27.04%
|
265/80-12
d=28.69
w=8.35
+31.84%
|
265/85-12
d=29.74
w=8.87
+36.63%
|
275 |
275/25-12
d=17.41
w=2.71
-19.99%
|
275/30-12
d=18.50
w=3.25
-15.01%
|
275/35-12
d=19.58
w=3.79
-10.04%
|
275/40-12
d=20.66
w=4.33
-5.07%
|
275/45-12
d=21.74
w=4.87
-0.09%
|
275/50-12
d=22.83
w=5.41
+4.88%
|
275/55-12
d=23.91
w=5.95
+9.86%
|
275/60-12
d=24.99
w=6.50
+14.83%
|
275/65-12
d=26.07
w=7.04
+19.81%
|
275/70-12
d=27.16
w=7.58
+24.78%
|
275/75-12
d=28.24
w=8.12
+29.76%
|
275/80-12
d=29.32
w=8.66
+34.73%
|
275/85-12
d=30.41
w=9.20
+39.71%
|
285 |
285/25-12
d=17.61
w=2.81
-19.08%
|
285/30-12
d=18.73
w=3.37
-13.93%
|
285/35-12
d=19.85
w=3.93
-8.77%
|
285/40-12
d=20.98
w=4.49
-3.62%
|
285/45-12
d=22.10
w=5.05
+1.54%
|
285/50-12
d=23.22
w=5.61
+6.69%
|
285/55-12
d=24.34
w=6.17
+11.85%
|
285/60-12
d=25.46
w=6.73
+17.00%
|
285/65-12
d=26.59
w=7.29
+22.16%
|
285/70-12
d=27.71
w=7.85
+27.32%
|
285/75-12
d=28.83
w=8.42
+32.47%
|
285/80-12
d=29.95
w=8.98
+37.63%
|
285/85-12
d=31.07
w=9.54
+42.78%
|
295 |
295/25-12
d=17.81
w=2.90
-18.18%
|
295/30-12
d=18.97
w=3.48
-12.84%
|
295/35-12
d=20.13
w=4.06
-7.51%
|
295/40-12
d=21.29
w=4.65
-2.17%
|
295/45-12
d=22.45
w=5.23
+3.17%
|
295/50-12
d=23.61
w=5.81
+8.50%
|
295/55-12
d=24.78
w=6.39
+13.84%
|
295/60-12
d=25.94
w=6.97
+19.18%
|
295/65-12
d=27.10
w=7.55
+24.51%
|
295/70-12
d=28.26
w=8.13
+29.85%
|
295/75-12
d=29.42
w=8.71
+35.18%
|
295/80-12
d=30.58
w=9.29
+40.52%
|
295/85-12
d=31.74
w=9.87
+45.86%
|
305 |
305/25-12
d=18.00
w=3.00
-17.28%
|
305/30-12
d=19.20
w=3.60
-11.76%
|
305/35-12
d=20.41
w=4.20
-6.24%
|
305/40-12
d=21.61
w=4.80
-0.72%
|
305/45-12
d=22.81
w=5.40
+4.79%
|
305/50-12
d=24.01
w=6.00
+10.31%
|
305/55-12
d=25.21
w=6.60
+15.83%
|
305/60-12
d=26.41
w=7.20
+21.35%
|
305/65-12
d=27.61
w=7.81
+26.86%
|
305/70-12
d=28.81
w=8.41
+32.38%
|
305/75-12
d=30.01
w=9.01
+37.90%
|
305/80-12
d=31.21
w=9.61
+43.42%
|
305/85-12
d=32.41
w=10.21
+48.93%
|
315 |
315/25-12
d=18.20
w=3.10
-16.37%
|
315/30-12
d=19.44
w=3.72
-10.67%
|
315/35-12
d=20.68
w=4.34
-4.97%
|
315/40-12
d=21.92
w=4.96
+0.72%
|
315/45-12
d=23.16
w=5.58
+6.42%
|
315/50-12
d=24.40
w=6.20
+12.12%
|
315/55-12
d=25.64
w=6.82
+17.82%
|
315/60-12
d=26.88
w=7.44
+23.52%
|
315/65-12
d=28.12
w=8.06
+29.21%
|
315/70-12
d=29.36
w=8.68
+34.91%
|
315/75-12
d=30.60
w=9.30
+40.61%
|
315/80-12
d=31.84
w=9.92
+46.31%
|
315/85-12
d=33.08
w=10.54
+52.01%
|
325 |
325/25-12
d=18.40
w=3.20
-15.47%
|
325/30-12
d=19.68
w=3.84
-9.59%
|
325/35-12
d=20.96
w=4.48
-3.71%
|
325/40-12
d=22.24
w=5.12
+2.17%
|
325/45-12
d=23.52
w=5.76
+8.05%
|
325/50-12
d=24.80
w=6.40
+13.93%
|
325/55-12
d=26.07
w=7.04
+19.81%
|
325/60-12
d=27.35
w=7.68
+25.69%
|
325/65-12
d=28.63
w=8.32
+31.57%
|
325/70-12
d=29.91
w=8.96
+37.45%
|
325/75-12
d=31.19
w=9.60
+43.32%
|
325/80-12
d=32.47
w=10.24
+49.20%
|
325/85-12
d=33.75
w=10.88
+55.08%
|
335 |
335/25-12
d=18.59
w=3.30
-14.56%
|
335/30-12
d=19.91
w=3.96
-8.50%
|
335/35-12
d=21.23
w=4.62
-2.44%
|
335/40-12
d=22.55
w=5.28
+3.62%
|
335/45-12
d=23.87
w=5.94
+9.68%
|
335/50-12
d=25.19
w=6.59
+15.74%
|
335/55-12
d=26.51
w=7.25
+21.80%
|
335/60-12
d=27.83
w=7.91
+27.86%
|
335/65-12
d=29.15
w=8.57
+33.92%
|
335/70-12
d=30.46
w=9.23
+39.98%
|
335/75-12
d=31.78
w=9.89
+46.04%
|
335/80-12
d=33.10
w=10.55
+52.10%
|
335/85-12
d=34.42
w=11.21
+58.16%
|
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
|
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!