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 |
195/70-13 | +0.03 % | 50.02 | 999.67 | 23.75 | 5.37 | 136.50 |
195/50-16 | -0.27 % | 49.87 | 1,002.65 | 23.68 | 3.84 | 97.50 |
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 |
185/75-13 | +0.78 % | 50.39 | 992.21 | 23.93 | 5.46 | 138.75 |
185/45-17 | -0.78 % | 49.61 | 1,007.79 | 23.56 | 3.28 | 83.25 |
205/65-13 | -1.04 % | 49.48 | 1,010.45 | 23.49 | 5.25 | 133.25 |
185/55-16 | +1.14 % | 50.57 | 988.56 | 24.01 | 4.01 | 101.75 |
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 |
205/50-16 | +1.39 % | 50.70 | 986.07 | 24.07 | 4.04 | 102.50 |
185/50-16 | -1.92 % | 49.04 | 1,019.24 | 23.28 | 3.64 | 92.50 |
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
|
|||||||||||||
Wheel Size 13
|
|||||||||||||
185 |
185/25-13
d=16.64
w=1.82
-29.90%
|
185/30-13
d=17.37
w=2.19
-26.83%
|
185/35-13
d=18.10
w=2.55
-23.76%
|
185/40-13
d=18.83
w=2.91
-20.70%
|
185/45-13
d=19.56
w=3.28
-17.63%
|
185/50-13
d=20.28
w=3.64
-14.56%
|
185/55-13
d=21.01
w=4.01
-11.49%
|
185/60-13
d=21.74
w=4.37
-8.42%
|
185/65-13
d=22.47
w=4.73
-5.36%
|
185/70-13
d=23.20
w=5.10
-2.29%
|
185/75-13
d=23.93
w=5.46
+0.78%
|
185/80-13
d=24.65
w=5.83
+3.85%
|
185/85-13
d=25.38
w=6.19
+6.92%
|
195 |
195/25-13
d=16.84
w=1.92
-29.07%
|
195/30-13
d=17.61
w=2.30
-25.84%
|
195/35-13
d=18.37
w=2.69
-22.60%
|
195/40-13
d=19.14
w=3.07
-19.37%
|
195/45-13
d=19.91
w=3.45
-16.14%
|
195/50-13
d=20.68
w=3.84
-12.90%
|
195/55-13
d=21.44
w=4.22
-9.67%
|
195/60-13
d=22.21
w=4.61
-6.43%
|
195/65-13
d=22.98
w=4.99
-3.20%
|
195/70-13
d=23.75
w=5.37
+0.03%
|
195/75-13
d=24.52
w=5.76
+3.27%
|
195/80-13
d=25.28
w=6.14
+6.50%
|
195/85-13
d=26.05
w=6.53
+9.73%
|
205 |
205/25-13
d=17.04
w=2.02
-28.24%
|
205/30-13
d=17.84
w=2.42
-24.84%
|
205/35-13
d=18.65
w=2.82
-21.44%
|
205/40-13
d=19.46
w=3.23
-18.04%
|
205/45-13
d=20.26
w=3.63
-14.64%
|
205/50-13
d=21.07
w=4.04
-11.24%
|
205/55-13
d=21.88
w=4.44
-7.84%
|
205/60-13
d=22.69
w=4.84
-4.44%
|
205/65-13
d=23.49
w=5.25
-1.04%
|
205/70-13
d=24.30
w=5.65
+2.35%
|
205/75-13
d=25.11
w=6.05
+5.75%
|
205/80-13
d=25.91
w=6.46
+9.15%
|
205/85-13
d=26.72
w=6.86
+12.55%
|
Wheel Size 14
|
|||||||||||||
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
|
|||||||||||||
185 |
185/25-16
d=19.64
w=1.82
-17.26%
|
185/30-16
d=20.37
w=2.19
-14.20%
|
185/35-16
d=21.10
w=2.55
-11.13%
|
185/40-16
d=21.83
w=2.91
-8.06%
|
185/45-16
d=22.56
w=3.28
-4.99%
|
185/50-16
d=23.28
w=3.64
-1.92%
|
185/55-16
d=24.01
w=4.01
+1.14%
|
185/60-16
d=24.74
w=4.37
+4.21%
|
185/65-16
d=25.47
w=4.73
+7.28%
|
185/70-16
d=26.20
w=5.10
+10.35%
|
185/75-16
d=26.93
w=5.46
+13.42%
|
185/80-16
d=27.65
w=5.83
+16.48%
|
185/85-16
d=28.38
w=6.19
+19.55%
|
195 |
195/25-16
d=19.84
w=1.92
-16.43%
|
195/30-16
d=20.61
w=2.30
-13.20%
|
195/35-16
d=21.37
w=2.69
-9.97%
|
195/40-16
d=22.14
w=3.07
-6.73%
|
195/45-16
d=22.91
w=3.45
-3.50%
|
195/50-16
d=23.68
w=3.84
-0.27%
|
195/55-16
d=24.44
w=4.22
+2.97%
|
195/60-16
d=25.21
w=4.61
+6.20%
|
195/65-16
d=25.98
w=4.99
+9.44%
|
195/70-16
d=26.75
w=5.37
+12.67%
|
195/75-16
d=27.52
w=5.76
+15.90%
|
195/80-16
d=28.28
w=6.14
+19.14%
|
195/85-16
d=29.05
w=6.53
+22.37%
|
205 |
205/25-16
d=20.04
w=2.02
-15.61%
|
205/30-16
d=20.84
w=2.42
-12.21%
|
205/35-16
d=21.65
w=2.82
-8.81%
|
205/40-16
d=22.46
w=3.23
-5.41%
|
205/45-16
d=23.26
w=3.63
-2.01%
|
205/50-16
d=24.07
w=4.04
+1.39%
|
205/55-16
d=24.88
w=4.44
+4.79%
|
205/60-16
d=25.69
w=4.84
+8.19%
|
205/65-16
d=26.49
w=5.25
+11.59%
|
205/70-16
d=27.30
w=5.65
+14.99%
|
205/75-16
d=28.11
w=6.05
+18.39%
|
205/80-16
d=28.91
w=6.46
+21.79%
|
205/85-16
d=29.72
w=6.86
+25.19%
|
Wheel Size 16.5
|
|||||||||||||
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
|
|||||||||||||
Wheel Size 19
|
|||||||||||||
Wheel Size 20
|
|||||||||||||
Wheel Size 21
|
|||||||||||||
185 |
185/25-21
d=24.64
w=1.82
+3.80%
|
185/30-21
d=25.37
w=2.19
+6.87%
|
185/35-21
d=26.10
w=2.55
+9.93%
|
185/40-21
d=26.83
w=2.91
+13.00%
|
185/45-21
d=27.56
w=3.28
+16.07%
|
185/50-21
d=28.28
w=3.64
+19.14%
|
185/55-21
d=29.01
w=4.01
+22.21%
|
185/60-21
d=29.74
w=4.37
+25.27%
|
185/65-21
d=30.47
w=4.73
+28.34%
|
185/70-21
d=31.20
w=5.10
+31.41%
|
185/75-21
d=31.93
w=5.46
+34.48%
|
185/80-21
d=32.65
w=5.83
+37.55%
|
185/85-21
d=33.38
w=6.19
+40.61%
|
195 |
195/25-21
d=24.84
w=1.92
+4.63%
|
195/30-21
d=25.61
w=2.30
+7.86%
|
195/35-21
d=26.37
w=2.69
+11.09%
|
195/40-21
d=27.14
w=3.07
+14.33%
|
195/45-21
d=27.91
w=3.45
+17.56%
|
195/50-21
d=28.68
w=3.84
+20.80%
|
195/55-21
d=29.44
w=4.22
+24.03%
|
195/60-21
d=30.21
w=4.61
+27.26%
|
195/65-21
d=30.98
w=4.99
+30.50%
|
195/70-21
d=31.75
w=5.37
+33.73%
|
195/75-21
d=32.52
w=5.76
+36.97%
|
195/80-21
d=33.28
w=6.14
+40.20%
|
195/85-21
d=34.05
w=6.53
+43.43%
|
205 |
205/25-21
d=25.04
w=2.02
+5.46%
|
205/30-21
d=25.84
w=2.42
+8.86%
|
205/35-21
d=26.65
w=2.82
+12.26%
|
205/40-21
d=27.46
w=3.23
+15.66%
|
205/45-21
d=28.26
w=3.63
+19.05%
|
205/50-21
d=29.07
w=4.04
+22.45%
|
205/55-21
d=29.88
w=4.44
+25.85%
|
205/60-21
d=30.69
w=4.84
+29.25%
|
205/65-21
d=31.49
w=5.25
+32.65%
|
205/70-21
d=32.30
w=5.65
+36.05%
|
205/75-21
d=33.11
w=6.05
+39.45%
|
205/80-21
d=33.91
w=6.46
+42.85%
|
205/85-21
d=34.72
w=6.86
+46.25%
|
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!