Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
---|---|---|---|---|---|---|
205/30-19 | +0.43 % | 50.22 | 995.69 | 23.84 | 2.42 | 61.50 |
195/30-19 | -0.56 % | 49.72 | 1,005.64 | 23.61 | 2.30 | 58.50 |
185/30-19 | -1.56 % | 49.22 | 1,015.59 | 23.37 | 2.19 | 55.50 |
185/35-19 | +1.51 % | 50.75 | 984.91 | 24.10 | 2.55 | 64.75 |
205/55-15 | +0.58 % | 50.29 | 994.20 | 23.88 | 4.44 | 112.75 |
195/55-15 | -1.24 % | 49.38 | 1,012.44 | 23.44 | 4.22 | 107.25 |
185/60-15 | 0.00 % | 50.00 | 1,000.00 | 23.74 | 4.37 | 111.00 |
195/60-15 | +1.99 % | 51.00 | 980.10 | 24.21 | 4.61 | 117.00 |
205/70-12 | -1.86 % | 49.07 | 1,018.57 | 23.30 | 5.65 | 143.50 |
195/75-12 | -0.95 % | 49.53 | 1,009.45 | 23.52 | 5.76 | 146.25 |
205/75-12 | +1.54 % | 50.77 | 984.58 | 24.11 | 6.05 | 153.75 |
185/80-12 | -0.36 % | 49.82 | 1,003.65 | 23.65 | 5.83 | 148.00 |
Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Wheel Size 12
|
|||||||||||||
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
|
|||||||||||||
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
|
|||||||||||||
Wheel Size 16.5
|
|||||||||||||
Wheel Size 17
|
|||||||||||||
Wheel Size 18
|
|||||||||||||
Wheel Size 19
|
|||||||||||||
185 |
185/25-19
d=22.64
w=1.82
-4.63%
|
185/30-19
d=23.37
w=2.19
-1.56%
|
185/35-19
d=24.10
w=2.55
+1.51%
|
185/40-19
d=24.83
w=2.91
+4.58%
|
185/45-19
d=25.56
w=3.28
+7.65%
|
185/50-19
d=26.28
w=3.64
+10.71%
|
185/55-19
d=27.01
w=4.01
+13.78%
|
185/60-19
d=27.74
w=4.37
+16.85%
|
185/65-19
d=28.47
w=4.73
+19.92%
|
185/70-19
d=29.20
w=5.10
+22.99%
|
185/75-19
d=29.93
w=5.46
+26.05%
|
185/80-19
d=30.65
w=5.83
+29.12%
|
185/85-19
d=31.38
w=6.19
+32.19%
|
195 |
195/25-19
d=22.84
w=1.92
-3.80%
|
195/30-19
d=23.61
w=2.30
-0.56%
|
195/35-19
d=24.37
w=2.69
+2.67%
|
195/40-19
d=25.14
w=3.07
+5.90%
|
195/45-19
d=25.91
w=3.45
+9.14%
|
195/50-19
d=26.68
w=3.84
+12.37%
|
195/55-19
d=27.44
w=4.22
+15.61%
|
195/60-19
d=28.21
w=4.61
+18.84%
|
195/65-19
d=28.98
w=4.99
+22.07%
|
195/70-19
d=29.75
w=5.37
+25.31%
|
195/75-19
d=30.52
w=5.76
+28.54%
|
195/80-19
d=31.28
w=6.14
+31.77%
|
195/85-19
d=32.05
w=6.53
+35.01%
|
205 |
205/25-19
d=23.04
w=2.02
-2.97%
|
205/30-19
d=23.84
w=2.42
+0.43%
|
205/35-19
d=24.65
w=2.82
+3.83%
|
205/40-19
d=25.46
w=3.23
+7.23%
|
205/45-19
d=26.26
w=3.63
+10.63%
|
205/50-19
d=27.07
w=4.04
+14.03%
|
205/55-19
d=27.88
w=4.44
+17.43%
|
205/60-19
d=28.69
w=4.84
+20.83%
|
205/65-19
d=29.49
w=5.25
+24.23%
|
205/70-19
d=30.30
w=5.65
+27.63%
|
205/75-19
d=31.11
w=6.05
+31.03%
|
205/80-19
d=31.91
w=6.46
+34.43%
|
205/85-19
d=32.72
w=6.86
+37.83%
|
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!