| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 155/80-13 | 0.00 % | 50.00 | 1,000.00 | 22.76 | 4.88 | 124.00 |
| 275/45-13 | -0.09 % | 49.96 | 1,000.86 | 22.74 | 4.87 | 123.75 |
| 225/55-13 | -0.09 % | 49.96 | 1,000.86 | 22.74 | 4.87 | 123.75 |
| 165/75-13 | -0.09 % | 49.96 | 1,000.86 | 22.74 | 4.87 | 123.75 |
| 145/85-13 | -0.26 % | 49.87 | 1,002.59 | 22.70 | 4.85 | 123.25 |
| 205/60-13 | -0.35 % | 49.83 | 1,003.46 | 22.69 | 4.84 | 123.00 |
| 245/50-13 | -0.52 % | 49.74 | 1,005.19 | 22.65 | 4.82 | 122.50 |
| 175/70-13 | -0.52 % | 49.74 | 1,005.19 | 22.65 | 4.82 | 122.50 |
| 315/40-13 | +0.69 % | 50.35 | 993.08 | 22.92 | 4.96 | 126.00 |
| 305/40-13 | -0.69 % | 49.65 | 1,006.92 | 22.61 | 4.80 | 122.00 |
| 195/65-13 | +0.95 % | 50.48 | 990.49 | 22.98 | 4.99 | 126.75 |
| 255/50-13 | +1.21 % | 50.61 | 987.89 | 23.04 | 5.02 | 127.50 |
| 185/65-13 | -1.30 % | 49.35 | 1,012.97 | 22.47 | 4.73 | 120.25 |
| 285/45-13 | +1.47 % | 50.74 | 985.30 | 23.10 | 5.05 | 128.25 |
| 265/45-13 | -1.64 % | 49.18 | 1,016.43 | 22.39 | 4.69 | 119.25 |
| 215/60-13 | +1.73 % | 50.86 | 982.70 | 23.16 | 5.08 | 129.00 |
| 235/55-13 | +1.82 % | 50.91 | 981.84 | 23.18 | 5.09 | 129.25 |
| 185/70-13 | +1.90 % | 50.95 | 980.98 | 23.20 | 5.10 | 129.50 |
| 215/55-13 | -1.99 % | 49.01 | 1,019.89 | 22.31 | 4.66 | 118.25 |
| Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Wheel Size 12
|
|||||||||||||
|
Wheel Size 13
|
|||||||||||||
| 145 |
145/25-13
d=15.85
w=1.43
-30.35%
|
145/30-13
d=16.43
w=1.71
-27.85%
|
145/35-13
d=17.00
w=2.00
-25.34%
|
145/40-13
d=17.57
w=2.28
-22.83%
|
145/45-13
d=18.14
w=2.57
-20.32%
|
145/50-13
d=18.71
w=2.85
-17.81%
|
145/55-13
d=19.28
w=3.14
-15.31%
|
145/60-13
d=19.85
w=3.43
-12.80%
|
145/65-13
d=20.42
w=3.71
-10.29%
|
145/70-13
d=20.99
w=4.00
-7.78%
|
145/75-13
d=21.56
w=4.28
-5.27%
|
145/80-13
d=22.13
w=4.57
-2.77%
|
145/85-13
d=22.70
w=4.85
-0.26%
|
| 155 |
155/25-13
d=16.05
w=1.53
-29.49%
|
155/30-13
d=16.66
w=1.83
-26.81%
|
155/35-13
d=17.27
w=2.14
-24.13%
|
155/40-13
d=17.88
w=2.44
-21.45%
|
155/45-13
d=18.49
w=2.75
-18.77%
|
155/50-13
d=19.10
w=3.05
-16.08%
|
155/55-13
d=19.71
w=3.36
-13.40%
|
155/60-13
d=20.32
w=3.66
-10.72%
|
155/65-13
d=20.93
w=3.97
-8.04%
|
155/70-13
d=21.54
w=4.27
-5.36%
|
155/75-13
d=22.15
w=4.58
-2.68%
|
155/80-13
d=22.76
w=4.88
0.00%
|
155/85-13
d=23.37
w=5.19
+2.68%
|
| 165 |
165/25-13
d=16.25
w=1.62
-28.62%
|
165/30-13
d=16.90
w=1.95
-25.77%
|
165/35-13
d=17.55
w=2.27
-22.92%
|
165/40-13
d=18.20
w=2.60
-20.06%
|
165/45-13
d=18.85
w=2.92
-17.21%
|
165/50-13
d=19.50
w=3.25
-14.35%
|
165/55-13
d=20.15
w=3.57
-11.50%
|
165/60-13
d=20.80
w=3.90
-8.65%
|
165/65-13
d=21.44
w=4.22
-5.79%
|
165/70-13
d=22.09
w=4.55
-2.94%
|
165/75-13
d=22.74
w=4.87
-0.09%
|
165/80-13
d=23.39
w=5.20
+2.77%
|
165/85-13
d=24.04
w=5.52
+5.62%
|
| 175 |
175/25-13
d=16.44
w=1.72
-27.76%
|
175/30-13
d=17.13
w=2.07
-24.73%
|
175/35-13
d=17.82
w=2.41
-21.71%
|
175/40-13
d=18.51
w=2.76
-18.68%
|
175/45-13
d=19.20
w=3.10
-15.65%
|
175/50-13
d=19.89
w=3.44
-12.63%
|
175/55-13
d=20.58
w=3.79
-9.60%
|
175/60-13
d=21.27
w=4.13
-6.57%
|
175/65-13
d=21.96
w=4.48
-3.55%
|
175/70-13
d=22.65
w=4.82
-0.52%
|
175/75-13
d=23.33
w=5.17
+2.51%
|
175/80-13
d=24.02
w=5.51
+5.53%
|
175/85-13
d=24.71
w=5.86
+8.56%
|
| 185 |
185/25-13
d=16.64
w=1.82
-26.89%
|
185/30-13
d=17.37
w=2.19
-23.69%
|
185/35-13
d=18.10
w=2.55
-20.49%
|
185/40-13
d=18.83
w=2.91
-17.30%
|
185/45-13
d=19.56
w=3.28
-14.10%
|
185/50-13
d=20.28
w=3.64
-10.90%
|
185/55-13
d=21.01
w=4.01
-7.70%
|
185/60-13
d=21.74
w=4.37
-4.50%
|
185/65-13
d=22.47
w=4.73
-1.30%
|
185/70-13
d=23.20
w=5.10
+1.90%
|
185/75-13
d=23.93
w=5.46
+5.10%
|
185/80-13
d=24.65
w=5.83
+8.30%
|
185/85-13
d=25.38
w=6.19
+11.50%
|
| 195 |
195/25-13
d=16.84
w=1.92
-26.03%
|
195/30-13
d=17.61
w=2.30
-22.66%
|
195/35-13
d=18.37
w=2.69
-19.28%
|
195/40-13
d=19.14
w=3.07
-15.91%
|
195/45-13
d=19.91
w=3.45
-12.54%
|
195/50-13
d=20.68
w=3.84
-9.17%
|
195/55-13
d=21.44
w=4.22
-5.79%
|
195/60-13
d=22.21
w=4.61
-2.42%
|
195/65-13
d=22.98
w=4.99
+0.95%
|
195/70-13
d=23.75
w=5.37
+4.32%
|
195/75-13
d=24.52
w=5.76
+7.70%
|
195/80-13
d=25.28
w=6.14
+11.07%
|
195/85-13
d=26.05
w=6.53
+14.44%
|
| 205 |
205/25-13
d=17.04
w=2.02
-25.16%
|
205/30-13
d=17.84
w=2.42
-21.62%
|
205/35-13
d=18.65
w=2.82
-18.07%
|
205/40-13
d=19.46
w=3.23
-14.53%
|
205/45-13
d=20.26
w=3.63
-10.98%
|
205/50-13
d=21.07
w=4.04
-7.44%
|
205/55-13
d=21.88
w=4.44
-3.89%
|
205/60-13
d=22.69
w=4.84
-0.35%
|
205/65-13
d=23.49
w=5.25
+3.20%
|
205/70-13
d=24.30
w=5.65
+6.75%
|
205/75-13
d=25.11
w=6.05
+10.29%
|
205/80-13
d=25.91
w=6.46
+13.84%
|
205/85-13
d=26.72
w=6.86
+17.38%
|
| 215 |
215/25-13
d=17.23
w=2.12
-24.30%
|
215/30-13
d=18.08
w=2.54
-20.58%
|
215/35-13
d=18.93
w=2.96
-16.86%
|
215/40-13
d=19.77
w=3.39
-13.14%
|
215/45-13
d=20.62
w=3.81
-9.43%
|
215/50-13
d=21.46
w=4.23
-5.71%
|
215/55-13
d=22.31
w=4.66
-1.99%
|
215/60-13
d=23.16
w=5.08
+1.73%
|
215/65-13
d=24.00
w=5.50
+5.45%
|
215/70-13
d=24.85
w=5.93
+9.17%
|
215/75-13
d=25.70
w=6.35
+12.88%
|
215/80-13
d=26.54
w=6.77
+16.60%
|
215/85-13
d=27.39
w=7.19
+20.32%
|
| 225 |
225/25-13
d=17.43
w=2.21
-23.43%
|
225/30-13
d=18.31
w=2.66
-19.54%
|
225/35-13
d=19.20
w=3.10
-15.65%
|
225/40-13
d=20.09
w=3.54
-11.76%
|
225/45-13
d=20.97
w=3.99
-7.87%
|
225/50-13
d=21.86
w=4.43
-3.98%
|
225/55-13
d=22.74
w=4.87
-0.09%
|
225/60-13
d=23.63
w=5.31
+3.80%
|
225/65-13
d=24.52
w=5.76
+7.70%
|
225/70-13
d=25.40
w=6.20
+11.59%
|
225/75-13
d=26.29
w=6.64
+15.48%
|
225/80-13
d=27.17
w=7.09
+19.37%
|
225/85-13
d=28.06
w=7.53
+23.26%
|
| 235 |
235/25-13
d=17.63
w=2.31
-22.57%
|
235/30-13
d=18.55
w=2.78
-18.51%
|
235/35-13
d=19.48
w=3.24
-14.44%
|
235/40-13
d=20.40
w=3.70
-10.38%
|
235/45-13
d=21.33
w=4.16
-6.31%
|
235/50-13
d=22.25
w=4.63
-2.25%
|
235/55-13
d=23.18
w=5.09
+1.82%
|
235/60-13
d=24.10
w=5.55
+5.88%
|
235/65-13
d=25.03
w=6.01
+9.94%
|
235/70-13
d=25.95
w=6.48
+14.01%
|
235/75-13
d=26.88
w=6.94
+18.07%
|
235/80-13
d=27.80
w=7.40
+22.14%
|
235/85-13
d=28.73
w=7.86
+26.20%
|
| 245 |
245/25-13
d=17.82
w=2.41
-21.71%
|
245/30-13
d=18.79
w=2.89
-17.47%
|
245/35-13
d=19.75
w=3.38
-13.23%
|
245/40-13
d=20.72
w=3.86
-8.99%
|
245/45-13
d=21.68
w=4.34
-4.76%
|
245/50-13
d=22.65
w=4.82
-0.52%
|
245/55-13
d=23.61
w=5.31
+3.72%
|
245/60-13
d=24.57
w=5.79
+7.96%
|
245/65-13
d=25.54
w=6.27
+12.19%
|
245/70-13
d=26.50
w=6.75
+16.43%
|
245/75-13
d=27.47
w=7.23
+20.67%
|
245/80-13
d=28.43
w=7.72
+24.90%
|
245/85-13
d=29.40
w=8.20
+29.14%
|
| 255 |
255/25-13
d=18.02
w=2.51
-20.84%
|
255/30-13
d=19.02
w=3.01
-16.43%
|
255/35-13
d=20.03
w=3.51
-12.02%
|
255/40-13
d=21.03
w=4.02
-7.61%
|
255/45-13
d=22.04
w=4.52
-3.20%
|
255/50-13
d=23.04
w=5.02
+1.21%
|
255/55-13
d=24.04
w=5.52
+5.62%
|
255/60-13
d=25.05
w=6.02
+10.03%
|
255/65-13
d=26.05
w=6.53
+14.44%
|
255/70-13
d=27.06
w=7.03
+18.85%
|
255/75-13
d=28.06
w=7.53
+23.26%
|
255/80-13
d=29.06
w=8.03
+27.67%
|
255/85-13
d=30.07
w=8.53
+32.08%
|
| 265 |
265/25-13
d=18.22
w=2.61
-19.98%
|
265/30-13
d=19.26
w=3.13
-15.39%
|
265/35-13
d=20.30
w=3.65
-10.81%
|
265/40-13
d=21.35
w=4.17
-6.23%
|
265/45-13
d=22.39
w=4.69
-1.64%
|
265/50-13
d=23.43
w=5.22
+2.94%
|
265/55-13
d=24.48
w=5.74
+7.52%
|
265/60-13
d=25.52
w=6.26
+12.11%
|
265/65-13
d=26.56
w=6.78
+16.69%
|
265/70-13
d=27.61
w=7.30
+21.27%
|
265/75-13
d=28.65
w=7.82
+25.86%
|
265/80-13
d=29.69
w=8.35
+30.44%
|
265/85-13
d=30.74
w=8.87
+35.02%
|
| 275 |
275/25-13
d=18.41
w=2.71
-19.11%
|
275/30-13
d=19.50
w=3.25
-14.35%
|
275/35-13
d=20.58
w=3.79
-9.60%
|
275/40-13
d=21.66
w=4.33
-4.84%
|
275/45-13
d=22.74
w=4.87
-0.09%
|
275/50-13
d=23.83
w=5.41
+4.67%
|
275/55-13
d=24.91
w=5.95
+9.43%
|
275/60-13
d=25.99
w=6.50
+14.18%
|
275/65-13
d=27.07
w=7.04
+18.94%
|
275/70-13
d=28.16
w=7.58
+23.69%
|
275/75-13
d=29.24
w=8.12
+28.45%
|
275/80-13
d=30.32
w=8.66
+33.21%
|
275/85-13
d=31.41
w=9.20
+37.96%
|
| 285 |
285/25-13
d=18.61
w=2.81
-18.25%
|
285/30-13
d=19.73
w=3.37
-13.32%
|
285/35-13
d=20.85
w=3.93
-8.39%
|
285/40-13
d=21.98
w=4.49
-3.46%
|
285/45-13
d=23.10
w=5.05
+1.47%
|
285/50-13
d=24.22
w=5.61
+6.40%
|
285/55-13
d=25.34
w=6.17
+11.33%
|
285/60-13
d=26.46
w=6.73
+16.26%
|
285/65-13
d=27.59
w=7.29
+21.19%
|
285/70-13
d=28.71
w=7.85
+26.12%
|
285/75-13
d=29.83
w=8.42
+31.04%
|
285/80-13
d=30.95
w=8.98
+35.97%
|
285/85-13
d=32.07
w=9.54
+40.90%
|
| 295 |
295/25-13
d=18.81
w=2.90
-17.38%
|
295/30-13
d=19.97
w=3.48
-12.28%
|
295/35-13
d=21.13
w=4.06
-7.18%
|
295/40-13
d=22.29
w=4.65
-2.08%
|
295/45-13
d=23.45
w=5.23
+3.03%
|
295/50-13
d=24.61
w=5.81
+8.13%
|
295/55-13
d=25.78
w=6.39
+13.23%
|
295/60-13
d=26.94
w=6.97
+18.33%
|
295/65-13
d=28.10
w=7.55
+23.43%
|
295/70-13
d=29.26
w=8.13
+28.54%
|
295/75-13
d=30.42
w=8.71
+33.64%
|
295/80-13
d=31.58
w=9.29
+38.74%
|
295/85-13
d=32.74
w=9.87
+43.84%
|
| 305 |
305/25-13
d=19.00
w=3.00
-16.52%
|
305/30-13
d=20.20
w=3.60
-11.24%
|
305/35-13
d=21.41
w=4.20
-5.97%
|
305/40-13
d=22.61
w=4.80
-0.69%
|
305/45-13
d=23.81
w=5.40
+4.58%
|
305/50-13
d=25.01
w=6.00
+9.86%
|
305/55-13
d=26.21
w=6.60
+15.13%
|
305/60-13
d=27.41
w=7.20
+20.41%
|
305/65-13
d=28.61
w=7.81
+25.68%
|
305/70-13
d=29.81
w=8.41
+30.96%
|
305/75-13
d=31.01
w=9.01
+36.23%
|
305/80-13
d=32.21
w=9.61
+41.51%
|
305/85-13
d=33.41
w=10.21
+46.78%
|
| 315 |
315/25-13
d=19.20
w=3.10
-15.65%
|
315/30-13
d=20.44
w=3.72
-10.20%
|
315/35-13
d=21.68
w=4.34
-4.76%
|
315/40-13
d=22.92
w=4.96
+0.69%
|
315/45-13
d=24.16
w=5.58
+6.14%
|
315/50-13
d=25.40
w=6.20
+11.59%
|
315/55-13
d=26.64
w=6.82
+17.04%
|
315/60-13
d=27.88
w=7.44
+22.48%
|
315/65-13
d=29.12
w=8.06
+27.93%
|
315/70-13
d=30.36
w=8.68
+33.38%
|
315/75-13
d=31.60
w=9.30
+38.83%
|
315/80-13
d=32.84
w=9.92
+44.28%
|
315/85-13
d=34.08
w=10.54
+49.72%
|
| 325 |
325/25-13
d=19.40
w=3.20
-14.79%
|
325/30-13
d=20.68
w=3.84
-9.17%
|
325/35-13
d=21.96
w=4.48
-3.55%
|
325/40-13
d=23.24
w=5.12
+2.08%
|
325/45-13
d=24.52
w=5.76
+7.70%
|
325/50-13
d=25.80
w=6.40
+13.32%
|
325/55-13
d=27.07
w=7.04
+18.94%
|
325/60-13
d=28.35
w=7.68
+24.56%
|
325/65-13
d=29.63
w=8.32
+30.18%
|
325/70-13
d=30.91
w=8.96
+35.80%
|
325/75-13
d=32.19
w=9.60
+41.42%
|
325/80-13
d=33.47
w=10.24
+47.04%
|
325/85-13
d=34.75
w=10.88
+52.66%
|
| 335 |
335/25-13
d=19.59
w=3.30
-13.92%
|
335/30-13
d=20.91
w=3.96
-8.13%
|
335/35-13
d=22.23
w=4.62
-2.33%
|
335/40-13
d=23.55
w=5.28
+3.46%
|
335/45-13
d=24.87
w=5.94
+9.25%
|
335/50-13
d=26.19
w=6.59
+15.05%
|
335/55-13
d=27.51
w=7.25
+20.84%
|
335/60-13
d=28.83
w=7.91
+26.63%
|
335/65-13
d=30.15
w=8.57
+32.43%
|
335/70-13
d=31.46
w=9.23
+38.22%
|
335/75-13
d=32.78
w=9.89
+44.02%
|
335/80-13
d=34.10
w=10.55
+49.81%
|
335/85-13
d=35.42
w=11.21
+55.60%
|
|
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
|
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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!