Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
---|---|---|---|---|---|---|
185/60-15 | 0.00 % | 50.00 | 1,000.00 | 23.74 | 4.37 | 111.00 |
185/80-12 | -0.36 % | 49.82 | 1,003.65 | 23.65 | 5.83 | 148.00 |
205/55-15 | +0.58 % | 50.29 | 994.20 | 23.88 | 4.44 | 112.75 |
195/45-17 | +0.71 % | 50.36 | 992.87 | 23.91 | 3.45 | 87.75 |
185/45-17 | -0.78 % | 49.61 | 1,007.79 | 23.56 | 3.28 | 83.25 |
195/75-12 | -0.95 % | 49.53 | 1,009.45 | 23.52 | 5.76 | 146.25 |
205/40-17 | -1.19 % | 49.40 | 1,011.94 | 23.46 | 3.23 | 82.00 |
195/55-15 | -1.24 % | 49.38 | 1,012.44 | 23.44 | 4.22 | 107.25 |
205/75-12 | +1.54 % | 50.77 | 984.58 | 24.11 | 6.05 | 153.75 |
205/70-12 | -1.86 % | 49.07 | 1,018.57 | 23.30 | 5.65 | 143.50 |
195/60-15 | +1.99 % | 51.00 | 980.10 | 24.21 | 4.61 | 117.00 |
Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Wheel Size 12
|
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185 |
185/25-12
d=15.64
w=1.82
-34.11%
|
185/30-12
d=16.37
w=2.19
-31.04%
|
185/35-12
d=17.10
w=2.55
-27.98%
|
185/40-12
d=17.83
w=2.91
-24.91%
|
185/45-12
d=18.56
w=3.28
-21.84%
|
185/50-12
d=19.28
w=3.64
-18.77%
|
185/55-12
d=20.01
w=4.01
-15.70%
|
185/60-12
d=20.74
w=4.37
-12.64%
|
185/65-12
d=21.47
w=4.73
-9.57%
|
185/70-12
d=22.20
w=5.10
-6.50%
|
185/75-12
d=22.93
w=5.46
-3.43%
|
185/80-12
d=23.65
w=5.83
-0.36%
|
185/85-12
d=24.38
w=6.19
+2.70%
|
195 |
195/25-12
d=15.84
w=1.92
-33.28%
|
195/30-12
d=16.61
w=2.30
-30.05%
|
195/35-12
d=17.37
w=2.69
-26.82%
|
195/40-12
d=18.14
w=3.07
-23.58%
|
195/45-12
d=18.91
w=3.45
-20.35%
|
195/50-12
d=19.68
w=3.84
-17.11%
|
195/55-12
d=20.44
w=4.22
-13.88%
|
195/60-12
d=21.21
w=4.61
-10.65%
|
195/65-12
d=21.98
w=4.99
-7.41%
|
195/70-12
d=22.75
w=5.37
-4.18%
|
195/75-12
d=23.52
w=5.76
-0.95%
|
195/80-12
d=24.28
w=6.14
+2.29%
|
195/85-12
d=25.05
w=6.53
+5.52%
|
205 |
205/25-12
d=16.04
w=2.02
-32.45%
|
205/30-12
d=16.84
w=2.42
-29.05%
|
205/35-12
d=17.65
w=2.82
-25.66%
|
205/40-12
d=18.46
w=3.23
-22.26%
|
205/45-12
d=19.26
w=3.63
-18.86%
|
205/50-12
d=20.07
w=4.04
-15.46%
|
205/55-12
d=20.88
w=4.44
-12.06%
|
205/60-12
d=21.69
w=4.84
-8.66%
|
205/65-12
d=22.49
w=5.25
-5.26%
|
205/70-12
d=23.30
w=5.65
-1.86%
|
205/75-12
d=24.11
w=6.05
+1.54%
|
205/80-12
d=24.91
w=6.46
+4.94%
|
205/85-12
d=25.72
w=6.86
+8.34%
|
Wheel Size 13
|
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Wheel Size 14
|
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Wheel Size 15
|
|||||||||||||
185 |
185/25-15
d=18.64
w=1.82
-21.48%
|
185/30-15
d=19.37
w=2.19
-18.41%
|
185/35-15
d=20.10
w=2.55
-15.34%
|
185/40-15
d=20.83
w=2.91
-12.27%
|
185/45-15
d=21.56
w=3.28
-9.20%
|
185/50-15
d=22.28
w=3.64
-6.14%
|
185/55-15
d=23.01
w=4.01
-3.07%
|
185/60-15
d=23.74
w=4.37
0.00%
|
185/65-15
d=24.47
w=4.73
+3.07%
|
185/70-15
d=25.20
w=5.10
+6.14%
|
185/75-15
d=25.93
w=5.46
+9.20%
|
185/80-15
d=26.65
w=5.83
+12.27%
|
185/85-15
d=27.38
w=6.19
+15.34%
|
195 |
195/25-15
d=18.84
w=1.92
-20.65%
|
195/30-15
d=19.61
w=2.30
-17.41%
|
195/35-15
d=20.37
w=2.69
-14.18%
|
195/40-15
d=21.14
w=3.07
-10.95%
|
195/45-15
d=21.91
w=3.45
-7.71%
|
195/50-15
d=22.68
w=3.84
-4.48%
|
195/55-15
d=23.44
w=4.22
-1.24%
|
195/60-15
d=24.21
w=4.61
+1.99%
|
195/65-15
d=24.98
w=4.99
+5.22%
|
195/70-15
d=25.75
w=5.37
+8.46%
|
195/75-15
d=26.52
w=5.76
+11.69%
|
195/80-15
d=27.28
w=6.14
+14.93%
|
195/85-15
d=28.05
w=6.53
+18.16%
|
205 |
205/25-15
d=19.04
w=2.02
-19.82%
|
205/30-15
d=19.84
w=2.42
-16.42%
|
205/35-15
d=20.65
w=2.82
-13.02%
|
205/40-15
d=21.46
w=3.23
-9.62%
|
205/45-15
d=22.26
w=3.63
-6.22%
|
205/50-15
d=23.07
w=4.04
-2.82%
|
205/55-15
d=23.88
w=4.44
+0.58%
|
205/60-15
d=24.69
w=4.84
+3.98%
|
205/65-15
d=25.49
w=5.25
+7.38%
|
205/70-15
d=26.30
w=5.65
+10.78%
|
205/75-15
d=27.11
w=6.05
+14.18%
|
205/80-15
d=27.91
w=6.46
+17.58%
|
205/85-15
d=28.72
w=6.86
+20.98%
|
Wheel Size 16
|
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Wheel Size 16.5
|
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Wheel Size 17
|
|||||||||||||
185 |
185/25-17
d=20.64
w=1.82
-13.05%
|
185/30-17
d=21.37
w=2.19
-9.98%
|
185/35-17
d=22.10
w=2.55
-6.92%
|
185/40-17
d=22.83
w=2.91
-3.85%
|
185/45-17
d=23.56
w=3.28
-0.78%
|
185/50-17
d=24.28
w=3.64
+2.29%
|
185/55-17
d=25.01
w=4.01
+5.36%
|
185/60-17
d=25.74
w=4.37
+8.42%
|
185/65-17
d=26.47
w=4.73
+11.49%
|
185/70-17
d=27.20
w=5.10
+14.56%
|
185/75-17
d=27.93
w=5.46
+17.63%
|
185/80-17
d=28.65
w=5.83
+20.70%
|
185/85-17
d=29.38
w=6.19
+23.76%
|
195 |
195/25-17
d=20.84
w=1.92
-12.22%
|
195/30-17
d=21.61
w=2.30
-8.99%
|
195/35-17
d=22.37
w=2.69
-5.75%
|
195/40-17
d=23.14
w=3.07
-2.52%
|
195/45-17
d=23.91
w=3.45
+0.71%
|
195/50-17
d=24.68
w=3.84
+3.95%
|
195/55-17
d=25.44
w=4.22
+7.18%
|
195/60-17
d=26.21
w=4.61
+10.41%
|
195/65-17
d=26.98
w=4.99
+13.65%
|
195/70-17
d=27.75
w=5.37
+16.88%
|
195/75-17
d=28.52
w=5.76
+20.12%
|
195/80-17
d=29.28
w=6.14
+23.35%
|
195/85-17
d=30.05
w=6.53
+26.58%
|
205 |
205/25-17
d=21.04
w=2.02
-11.39%
|
205/30-17
d=21.84
w=2.42
-7.99%
|
205/35-17
d=22.65
w=2.82
-4.59%
|
205/40-17
d=23.46
w=3.23
-1.19%
|
205/45-17
d=24.26
w=3.63
+2.21%
|
205/50-17
d=25.07
w=4.04
+5.61%
|
205/55-17
d=25.88
w=4.44
+9.00%
|
205/60-17
d=26.69
w=4.84
+12.40%
|
205/65-17
d=27.49
w=5.25
+15.80%
|
205/70-17
d=28.30
w=5.65
+19.20%
|
205/75-17
d=29.11
w=6.05
+22.60%
|
205/80-17
d=29.91
w=6.46
+26.00%
|
205/85-17
d=30.72
w=6.86
+29.40%
|
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!