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 |
205/60-14 | -0.23 % | 49.88 | 1,002.32 | 23.69 | 4.84 | 123.00 |
185/40-18 | +0.36 % | 50.18 | 996.35 | 23.83 | 2.91 | 74.00 |
205/35-18 | -0.38 % | 49.81 | 1,003.81 | 23.65 | 2.82 | 71.75 |
195/25-20 | +0.41 % | 50.21 | 995.85 | 23.84 | 1.92 | 48.75 |
185/25-20 | -0.41 % | 49.79 | 1,004.15 | 23.64 | 1.82 | 46.25 |
205/55-15 | +0.58 % | 50.29 | 994.20 | 23.88 | 4.44 | 112.75 |
195/65-14 | +1.01 % | 50.51 | 989.88 | 23.98 | 4.99 | 126.75 |
185/65-14 | -1.14 % | 49.43 | 1,011.44 | 23.47 | 4.73 | 120.25 |
205/25-20 | +1.24 % | 50.62 | 987.56 | 24.04 | 2.02 | 51.25 |
195/55-15 | -1.24 % | 49.38 | 1,012.44 | 23.44 | 4.22 | 107.25 |
195/35-18 | -1.54 % | 49.23 | 1,015.42 | 23.37 | 2.69 | 68.25 |
195/40-18 | +1.69 % | 50.85 | 983.08 | 24.14 | 3.07 | 78.00 |
185/70-14 | +1.92 % | 50.96 | 980.76 | 24.20 | 5.10 | 129.50 |
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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Wheel Size 13
|
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Wheel Size 14
|
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185 |
185/25-14
d=17.64
w=1.82
-25.69%
|
185/30-14
d=18.37
w=2.19
-22.62%
|
185/35-14
d=19.10
w=2.55
-19.55%
|
185/40-14
d=19.83
w=2.91
-16.48%
|
185/45-14
d=20.56
w=3.28
-13.42%
|
185/50-14
d=21.28
w=3.64
-10.35%
|
185/55-14
d=22.01
w=4.01
-7.28%
|
185/60-14
d=22.74
w=4.37
-4.21%
|
185/65-14
d=23.47
w=4.73
-1.14%
|
185/70-14
d=24.20
w=5.10
+1.92%
|
185/75-14
d=24.93
w=5.46
+4.99%
|
185/80-14
d=25.65
w=5.83
+8.06%
|
185/85-14
d=26.38
w=6.19
+11.13%
|
195 |
195/25-14
d=17.84
w=1.92
-24.86%
|
195/30-14
d=18.61
w=2.30
-21.63%
|
195/35-14
d=19.37
w=2.69
-18.39%
|
195/40-14
d=20.14
w=3.07
-15.16%
|
195/45-14
d=20.91
w=3.45
-11.92%
|
195/50-14
d=21.68
w=3.84
-8.69%
|
195/55-14
d=22.44
w=4.22
-5.46%
|
195/60-14
d=23.21
w=4.61
-2.22%
|
195/65-14
d=23.98
w=4.99
+1.01%
|
195/70-14
d=24.75
w=5.37
+4.25%
|
195/75-14
d=25.52
w=5.76
+7.48%
|
195/80-14
d=26.28
w=6.14
+10.71%
|
195/85-14
d=27.05
w=6.53
+13.95%
|
205 |
205/25-14
d=18.04
w=2.02
-24.03%
|
205/30-14
d=18.84
w=2.42
-20.63%
|
205/35-14
d=19.65
w=2.82
-17.23%
|
205/40-14
d=20.46
w=3.23
-13.83%
|
205/45-14
d=21.26
w=3.63
-10.43%
|
205/50-14
d=22.07
w=4.04
-7.03%
|
205/55-14
d=22.88
w=4.44
-3.63%
|
205/60-14
d=23.69
w=4.84
-0.23%
|
205/65-14
d=24.49
w=5.25
+3.17%
|
205/70-14
d=25.30
w=5.65
+6.57%
|
205/75-14
d=26.11
w=6.05
+9.97%
|
205/80-14
d=26.91
w=6.46
+13.37%
|
205/85-14
d=27.72
w=6.86
+16.77%
|
Wheel Size 15
|
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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
|
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Wheel Size 18
|
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185 |
185/25-18
d=21.64
w=1.82
-8.84%
|
185/30-18
d=22.37
w=2.19
-5.77%
|
185/35-18
d=23.10
w=2.55
-2.70%
|
185/40-18
d=23.83
w=2.91
+0.36%
|
185/45-18
d=24.56
w=3.28
+3.43%
|
185/50-18
d=25.28
w=3.64
+6.50%
|
185/55-18
d=26.01
w=4.01
+9.57%
|
185/60-18
d=26.74
w=4.37
+12.64%
|
185/65-18
d=27.47
w=4.73
+15.70%
|
185/70-18
d=28.20
w=5.10
+18.77%
|
185/75-18
d=28.93
w=5.46
+21.84%
|
185/80-18
d=29.65
w=5.83
+24.91%
|
185/85-18
d=30.38
w=6.19
+27.98%
|
195 |
195/25-18
d=21.84
w=1.92
-8.01%
|
195/30-18
d=22.61
w=2.30
-4.78%
|
195/35-18
d=23.37
w=2.69
-1.54%
|
195/40-18
d=24.14
w=3.07
+1.69%
|
195/45-18
d=24.91
w=3.45
+4.93%
|
195/50-18
d=25.68
w=3.84
+8.16%
|
195/55-18
d=26.44
w=4.22
+11.39%
|
195/60-18
d=27.21
w=4.61
+14.63%
|
195/65-18
d=27.98
w=4.99
+17.86%
|
195/70-18
d=28.75
w=5.37
+21.09%
|
195/75-18
d=29.52
w=5.76
+24.33%
|
195/80-18
d=30.28
w=6.14
+27.56%
|
195/85-18
d=31.05
w=6.53
+30.80%
|
205 |
205/25-18
d=22.04
w=2.02
-7.18%
|
205/30-18
d=22.84
w=2.42
-3.78%
|
205/35-18
d=23.65
w=2.82
-0.38%
|
205/40-18
d=24.46
w=3.23
+3.02%
|
205/45-18
d=25.26
w=3.63
+6.42%
|
205/50-18
d=26.07
w=4.04
+9.82%
|
205/55-18
d=26.88
w=4.44
+13.22%
|
205/60-18
d=27.69
w=4.84
+16.62%
|
205/65-18
d=28.49
w=5.25
+20.02%
|
205/70-18
d=29.30
w=5.65
+23.42%
|
205/75-18
d=30.11
w=6.05
+26.82%
|
205/80-18
d=30.91
w=6.46
+30.22%
|
205/85-18
d=31.72
w=6.86
+33.62%
|
Wheel Size 19
|
|||||||||||||
Wheel Size 20
|
|||||||||||||
185 |
185/25-20
d=23.64
w=1.82
-0.41%
|
185/30-20
d=24.37
w=2.19
+2.65%
|
185/35-20
d=25.10
w=2.55
+5.72%
|
185/40-20
d=25.83
w=2.91
+8.79%
|
185/45-20
d=26.56
w=3.28
+11.86%
|
185/50-20
d=27.28
w=3.64
+14.93%
|
185/55-20
d=28.01
w=4.01
+17.99%
|
185/60-20
d=28.74
w=4.37
+21.06%
|
185/65-20
d=29.47
w=4.73
+24.13%
|
185/70-20
d=30.20
w=5.10
+27.20%
|
185/75-20
d=30.93
w=5.46
+30.27%
|
185/80-20
d=31.65
w=5.83
+33.33%
|
185/85-20
d=32.38
w=6.19
+36.40%
|
195 |
195/25-20
d=23.84
w=1.92
+0.41%
|
195/30-20
d=24.61
w=2.30
+3.65%
|
195/35-20
d=25.37
w=2.69
+6.88%
|
195/40-20
d=26.14
w=3.07
+10.12%
|
195/45-20
d=26.91
w=3.45
+13.35%
|
195/50-20
d=27.68
w=3.84
+16.58%
|
195/55-20
d=28.44
w=4.22
+19.82%
|
195/60-20
d=29.21
w=4.61
+23.05%
|
195/65-20
d=29.98
w=4.99
+26.29%
|
195/70-20
d=30.75
w=5.37
+29.52%
|
195/75-20
d=31.52
w=5.76
+32.75%
|
195/80-20
d=32.28
w=6.14
+35.99%
|
195/85-20
d=33.05
w=6.53
+39.22%
|
205 |
205/25-20
d=24.04
w=2.02
+1.24%
|
205/30-20
d=24.84
w=2.42
+4.64%
|
205/35-20
d=25.65
w=2.82
+8.04%
|
205/40-20
d=26.46
w=3.23
+11.44%
|
205/45-20
d=27.26
w=3.63
+14.84%
|
205/50-20
d=28.07
w=4.04
+18.24%
|
205/55-20
d=28.88
w=4.44
+21.64%
|
205/60-20
d=29.69
w=4.84
+25.04%
|
205/65-20
d=30.49
w=5.25
+28.44%
|
205/70-20
d=31.30
w=5.65
+31.84%
|
205/75-20
d=32.11
w=6.05
+35.24%
|
205/80-20
d=32.91
w=6.46
+38.64%
|
205/85-20
d=33.72
w=6.86
+42.04%
|
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!