| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 205/75-15 | 0.00 % | 50.00 | 1,000.00 | 27.11 | 6.05 | 153.75 |
| 255/60-15 | -0.22 % | 49.89 | 1,002.18 | 27.05 | 6.02 | 153.00 |
| 235/65-15 | -0.29 % | 49.85 | 1,002.90 | 27.03 | 6.01 | 152.75 |
| 305/50-15 | -0.36 % | 49.82 | 1,003.63 | 27.01 | 6.00 | 152.50 |
| 195/80-15 | +0.65 % | 50.33 | 993.46 | 27.28 | 6.14 | 156.00 |
| 275/55-15 | -0.73 % | 49.64 | 1,007.26 | 26.91 | 5.95 | 151.25 |
| 285/55-15 | +0.87 % | 50.44 | 991.29 | 27.34 | 6.17 | 156.75 |
| 335/45-15 | -0.87 % | 49.56 | 1,008.71 | 26.87 | 5.94 | 150.75 |
| 215/70-15 | -0.94 % | 49.53 | 1,009.44 | 26.85 | 5.93 | 150.50 |
| 185/85-15 | +1.02 % | 50.51 | 989.83 | 27.38 | 6.19 | 157.25 |
| 315/50-15 | +1.09 % | 50.54 | 989.11 | 27.40 | 6.20 | 157.50 |
| 225/70-15 | +1.09 % | 50.54 | 989.11 | 27.40 | 6.20 | 157.50 |
| 175/85-15 | -1.45 % | 49.27 | 1,014.52 | 26.71 | 5.86 | 148.75 |
| 265/60-15 | +1.53 % | 50.76 | 984.75 | 27.52 | 6.26 | 159.00 |
| 245/65-15 | +1.60 % | 50.80 | 984.02 | 27.54 | 6.27 | 159.25 |
| 185/80-15 | -1.67 % | 49.16 | 1,016.70 | 26.65 | 5.83 | 148.00 |
| 295/50-15 | -1.82 % | 49.09 | 1,018.16 | 26.61 | 5.81 | 147.50 |
| 245/60-15 | -1.96 % | 49.02 | 1,019.61 | 26.57 | 5.79 | 147.00 |
| Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Wheel Size 12
|
|||||||||||||
|
Wheel Size 13
|
|||||||||||||
|
Wheel Size 14
|
|||||||||||||
|
Wheel Size 15
|
|||||||||||||
| 145 |
145/25-15
d=17.85
w=1.43
-34.13%
|
145/30-15
d=18.43
w=1.71
-32.03%
|
145/35-15
d=19.00
w=2.00
-29.92%
|
145/40-15
d=19.57
w=2.28
-27.81%
|
145/45-15
d=20.14
w=2.57
-25.71%
|
145/50-15
d=20.71
w=2.85
-23.60%
|
145/55-15
d=21.28
w=3.14
-21.50%
|
145/60-15
d=21.85
w=3.43
-19.39%
|
145/65-15
d=22.42
w=3.71
-17.28%
|
145/70-15
d=22.99
w=4.00
-15.18%
|
145/75-15
d=23.56
w=4.28
-13.07%
|
145/80-15
d=24.13
w=4.57
-10.97%
|
145/85-15
d=24.70
w=4.85
-8.86%
|
| 155 |
155/25-15
d=18.05
w=1.53
-33.41%
|
155/30-15
d=18.66
w=1.83
-31.15%
|
155/35-15
d=19.27
w=2.14
-28.90%
|
155/40-15
d=19.88
w=2.44
-26.65%
|
155/45-15
d=20.49
w=2.75
-24.40%
|
155/50-15
d=21.10
w=3.05
-22.15%
|
155/55-15
d=21.71
w=3.36
-19.90%
|
155/60-15
d=22.32
w=3.66
-17.65%
|
155/65-15
d=22.93
w=3.97
-15.40%
|
155/70-15
d=23.54
w=4.27
-13.14%
|
155/75-15
d=24.15
w=4.58
-10.89%
|
155/80-15
d=24.76
w=4.88
-8.64%
|
155/85-15
d=25.37
w=5.19
-6.39%
|
| 165 |
165/25-15
d=18.25
w=1.62
-32.68%
|
165/30-15
d=18.90
w=1.95
-30.28%
|
165/35-15
d=19.55
w=2.27
-27.89%
|
165/40-15
d=20.20
w=2.60
-25.49%
|
165/45-15
d=20.85
w=2.92
-23.09%
|
165/50-15
d=21.50
w=3.25
-20.70%
|
165/55-15
d=22.15
w=3.57
-18.30%
|
165/60-15
d=22.80
w=3.90
-15.90%
|
165/65-15
d=23.44
w=4.22
-13.51%
|
165/70-15
d=24.09
w=4.55
-11.11%
|
165/75-15
d=24.74
w=4.87
-8.71%
|
165/80-15
d=25.39
w=5.20
-6.32%
|
165/85-15
d=26.04
w=5.52
-3.92%
|
| 175 |
175/25-15
d=18.44
w=1.72
-31.95%
|
175/30-15
d=19.13
w=2.07
-29.41%
|
175/35-15
d=19.82
w=2.41
-26.87%
|
175/40-15
d=20.51
w=2.76
-24.33%
|
175/45-15
d=21.20
w=3.10
-21.79%
|
175/50-15
d=21.89
w=3.44
-19.24%
|
175/55-15
d=22.58
w=3.79
-16.70%
|
175/60-15
d=23.27
w=4.13
-14.16%
|
175/65-15
d=23.96
w=4.48
-11.62%
|
175/70-15
d=24.65
w=4.82
-9.08%
|
175/75-15
d=25.33
w=5.17
-6.54%
|
175/80-15
d=26.02
w=5.51
-3.99%
|
175/85-15
d=26.71
w=5.86
-1.45%
|
| 185 |
185/25-15
d=18.64
w=1.82
-31.23%
|
185/30-15
d=19.37
w=2.19
-28.54%
|
185/35-15
d=20.10
w=2.55
-25.85%
|
185/40-15
d=20.83
w=2.91
-23.17%
|
185/45-15
d=21.56
w=3.28
-20.48%
|
185/50-15
d=22.28
w=3.64
-17.79%
|
185/55-15
d=23.01
w=4.01
-15.11%
|
185/60-15
d=23.74
w=4.37
-12.42%
|
185/65-15
d=24.47
w=4.73
-9.73%
|
185/70-15
d=25.20
w=5.10
-7.04%
|
185/75-15
d=25.93
w=5.46
-4.36%
|
185/80-15
d=26.65
w=5.83
-1.67%
|
185/85-15
d=27.38
w=6.19
+1.02%
|
| 195 |
195/25-15
d=18.84
w=1.92
-30.50%
|
195/30-15
d=19.61
w=2.30
-27.67%
|
195/35-15
d=20.37
w=2.69
-24.84%
|
195/40-15
d=21.14
w=3.07
-22.00%
|
195/45-15
d=21.91
w=3.45
-19.17%
|
195/50-15
d=22.68
w=3.84
-16.34%
|
195/55-15
d=23.44
w=4.22
-13.51%
|
195/60-15
d=24.21
w=4.61
-10.68%
|
195/65-15
d=24.98
w=4.99
-7.84%
|
195/70-15
d=25.75
w=5.37
-5.01%
|
195/75-15
d=26.52
w=5.76
-2.18%
|
195/80-15
d=27.28
w=6.14
+0.65%
|
195/85-15
d=28.05
w=6.53
+3.49%
|
| 205 |
205/25-15
d=19.04
w=2.02
-29.77%
|
205/30-15
d=19.84
w=2.42
-26.80%
|
205/35-15
d=20.65
w=2.82
-23.82%
|
205/40-15
d=21.46
w=3.23
-20.84%
|
205/45-15
d=22.26
w=3.63
-17.86%
|
205/50-15
d=23.07
w=4.04
-14.89%
|
205/55-15
d=23.88
w=4.44
-11.91%
|
205/60-15
d=24.69
w=4.84
-8.93%
|
205/65-15
d=25.49
w=5.25
-5.95%
|
205/70-15
d=26.30
w=5.65
-2.98%
|
205/75-15
d=27.11
w=6.05
0.00%
|
205/80-15
d=27.91
w=6.46
+2.98%
|
205/85-15
d=28.72
w=6.86
+5.95%
|
| 215 |
215/25-15
d=19.23
w=2.12
-29.05%
|
215/30-15
d=20.08
w=2.54
-25.93%
|
215/35-15
d=20.93
w=2.96
-22.80%
|
215/40-15
d=21.77
w=3.39
-19.68%
|
215/45-15
d=22.62
w=3.81
-16.56%
|
215/50-15
d=23.46
w=4.23
-13.44%
|
215/55-15
d=24.31
w=4.66
-10.31%
|
215/60-15
d=25.16
w=5.08
-7.19%
|
215/65-15
d=26.00
w=5.50
-4.07%
|
215/70-15
d=26.85
w=5.93
-0.94%
|
215/75-15
d=27.70
w=6.35
+2.18%
|
215/80-15
d=28.54
w=6.77
+5.30%
|
215/85-15
d=29.39
w=7.19
+8.42%
|
| 225 |
225/25-15
d=19.43
w=2.21
-28.32%
|
225/30-15
d=20.31
w=2.66
-25.05%
|
225/35-15
d=21.20
w=3.10
-21.79%
|
225/40-15
d=22.09
w=3.54
-18.52%
|
225/45-15
d=22.97
w=3.99
-15.25%
|
225/50-15
d=23.86
w=4.43
-11.98%
|
225/55-15
d=24.74
w=4.87
-8.71%
|
225/60-15
d=25.63
w=5.31
-5.45%
|
225/65-15
d=26.52
w=5.76
-2.18%
|
225/70-15
d=27.40
w=6.20
+1.09%
|
225/75-15
d=28.29
w=6.64
+4.36%
|
225/80-15
d=29.17
w=7.09
+7.63%
|
225/85-15
d=30.06
w=7.53
+10.89%
|
| 235 |
235/25-15
d=19.63
w=2.31
-27.60%
|
235/30-15
d=20.55
w=2.78
-24.18%
|
235/35-15
d=21.48
w=3.24
-20.77%
|
235/40-15
d=22.40
w=3.70
-17.36%
|
235/45-15
d=23.33
w=4.16
-13.94%
|
235/50-15
d=24.25
w=4.63
-10.53%
|
235/55-15
d=25.18
w=5.09
-7.12%
|
235/60-15
d=26.10
w=5.55
-3.70%
|
235/65-15
d=27.03
w=6.01
-0.29%
|
235/70-15
d=27.95
w=6.48
+3.12%
|
235/75-15
d=28.88
w=6.94
+6.54%
|
235/80-15
d=29.80
w=7.40
+9.95%
|
235/85-15
d=30.73
w=7.86
+13.36%
|
| 245 |
245/25-15
d=19.82
w=2.41
-26.87%
|
245/30-15
d=20.79
w=2.89
-23.31%
|
245/35-15
d=21.75
w=3.38
-19.75%
|
245/40-15
d=22.72
w=3.86
-16.19%
|
245/45-15
d=23.68
w=4.34
-12.64%
|
245/50-15
d=24.65
w=4.82
-9.08%
|
245/55-15
d=25.61
w=5.31
-5.52%
|
245/60-15
d=26.57
w=5.79
-1.96%
|
245/65-15
d=27.54
w=6.27
+1.60%
|
245/70-15
d=28.50
w=6.75
+5.16%
|
245/75-15
d=29.47
w=7.23
+8.71%
|
245/80-15
d=30.43
w=7.72
+12.27%
|
245/85-15
d=31.40
w=8.20
+15.83%
|
| 255 |
255/25-15
d=20.02
w=2.51
-26.14%
|
255/30-15
d=21.02
w=3.01
-22.44%
|
255/35-15
d=22.03
w=3.51
-18.74%
|
255/40-15
d=23.03
w=4.02
-15.03%
|
255/45-15
d=24.04
w=4.52
-11.33%
|
255/50-15
d=25.04
w=5.02
-7.63%
|
255/55-15
d=26.04
w=5.52
-3.92%
|
255/60-15
d=27.05
w=6.02
-0.22%
|
255/65-15
d=28.05
w=6.53
+3.49%
|
255/70-15
d=29.06
w=7.03
+7.19%
|
255/75-15
d=30.06
w=7.53
+10.89%
|
255/80-15
d=31.06
w=8.03
+14.60%
|
255/85-15
d=32.07
w=8.53
+18.30%
|
| 265 |
265/25-15
d=20.22
w=2.61
-25.42%
|
265/30-15
d=21.26
w=3.13
-21.57%
|
265/35-15
d=22.30
w=3.65
-17.72%
|
265/40-15
d=23.35
w=4.17
-13.87%
|
265/45-15
d=24.39
w=4.69
-10.02%
|
265/50-15
d=25.43
w=5.22
-6.17%
|
265/55-15
d=26.48
w=5.74
-2.32%
|
265/60-15
d=27.52
w=6.26
+1.53%
|
265/65-15
d=28.56
w=6.78
+5.37%
|
265/70-15
d=29.61
w=7.30
+9.22%
|
265/75-15
d=30.65
w=7.82
+13.07%
|
265/80-15
d=31.69
w=8.35
+16.92%
|
265/85-15
d=32.74
w=8.87
+20.77%
|
| 275 |
275/25-15
d=20.41
w=2.71
-24.69%
|
275/30-15
d=21.50
w=3.25
-20.70%
|
275/35-15
d=22.58
w=3.79
-16.70%
|
275/40-15
d=23.66
w=4.33
-12.71%
|
275/45-15
d=24.74
w=4.87
-8.71%
|
275/50-15
d=25.83
w=5.41
-4.72%
|
275/55-15
d=26.91
w=5.95
-0.73%
|
275/60-15
d=27.99
w=6.50
+3.27%
|
275/65-15
d=29.07
w=7.04
+7.26%
|
275/70-15
d=30.16
w=7.58
+11.26%
|
275/75-15
d=31.24
w=8.12
+15.25%
|
275/80-15
d=32.32
w=8.66
+19.24%
|
275/85-15
d=33.41
w=9.20
+23.24%
|
| 285 |
285/25-15
d=20.61
w=2.81
-23.97%
|
285/30-15
d=21.73
w=3.37
-19.83%
|
285/35-15
d=22.85
w=3.93
-15.69%
|
285/40-15
d=23.98
w=4.49
-11.55%
|
285/45-15
d=25.10
w=5.05
-7.41%
|
285/50-15
d=26.22
w=5.61
-3.27%
|
285/55-15
d=27.34
w=6.17
+0.87%
|
285/60-15
d=28.46
w=6.73
+5.01%
|
285/65-15
d=29.59
w=7.29
+9.15%
|
285/70-15
d=30.71
w=7.85
+13.29%
|
285/75-15
d=31.83
w=8.42
+17.43%
|
285/80-15
d=32.95
w=8.98
+21.57%
|
285/85-15
d=34.07
w=9.54
+25.71%
|
| 295 |
295/25-15
d=20.81
w=2.90
-23.24%
|
295/30-15
d=21.97
w=3.48
-18.95%
|
295/35-15
d=23.13
w=4.06
-14.67%
|
295/40-15
d=24.29
w=4.65
-10.38%
|
295/45-15
d=25.45
w=5.23
-6.10%
|
295/50-15
d=26.61
w=5.81
-1.82%
|
295/55-15
d=27.78
w=6.39
+2.47%
|
295/60-15
d=28.94
w=6.97
+6.75%
|
295/65-15
d=30.10
w=7.55
+11.04%
|
295/70-15
d=31.26
w=8.13
+15.32%
|
295/75-15
d=32.42
w=8.71
+19.61%
|
295/80-15
d=33.58
w=9.29
+23.89%
|
295/85-15
d=34.74
w=9.87
+28.18%
|
| 305 |
305/25-15
d=21.00
w=3.00
-22.51%
|
305/30-15
d=22.20
w=3.60
-18.08%
|
305/35-15
d=23.41
w=4.20
-13.65%
|
305/40-15
d=24.61
w=4.80
-9.22%
|
305/45-15
d=25.81
w=5.40
-4.79%
|
305/50-15
d=27.01
w=6.00
-0.36%
|
305/55-15
d=28.21
w=6.60
+4.07%
|
305/60-15
d=29.41
w=7.20
+8.50%
|
305/65-15
d=30.61
w=7.81
+12.93%
|
305/70-15
d=31.81
w=8.41
+17.36%
|
305/75-15
d=33.01
w=9.01
+21.79%
|
305/80-15
d=34.21
w=9.61
+26.22%
|
305/85-15
d=35.41
w=10.21
+30.65%
|
| 315 |
315/25-15
d=21.20
w=3.10
-21.79%
|
315/30-15
d=22.44
w=3.72
-17.21%
|
315/35-15
d=23.68
w=4.34
-12.64%
|
315/40-15
d=24.92
w=4.96
-8.06%
|
315/45-15
d=26.16
w=5.58
-3.49%
|
315/50-15
d=27.40
w=6.20
+1.09%
|
315/55-15
d=28.64
w=6.82
+5.66%
|
315/60-15
d=29.88
w=7.44
+10.24%
|
315/65-15
d=31.12
w=8.06
+14.81%
|
315/70-15
d=32.36
w=8.68
+19.39%
|
315/75-15
d=33.60
w=9.30
+23.97%
|
315/80-15
d=34.84
w=9.92
+28.54%
|
315/85-15
d=36.08
w=10.54
+33.12%
|
| 325 |
325/25-15
d=21.40
w=3.20
-21.06%
|
325/30-15
d=22.68
w=3.84
-16.34%
|
325/35-15
d=23.96
w=4.48
-11.62%
|
325/40-15
d=25.24
w=5.12
-6.90%
|
325/45-15
d=26.52
w=5.76
-2.18%
|
325/50-15
d=27.80
w=6.40
+2.54%
|
325/55-15
d=29.07
w=7.04
+7.26%
|
325/60-15
d=30.35
w=7.68
+11.98%
|
325/65-15
d=31.63
w=8.32
+16.70%
|
325/70-15
d=32.91
w=8.96
+21.42%
|
325/75-15
d=34.19
w=9.60
+26.14%
|
325/80-15
d=35.47
w=10.24
+30.86%
|
325/85-15
d=36.75
w=10.88
+35.58%
|
| 335 |
335/25-15
d=21.59
w=3.30
-20.33%
|
335/30-15
d=22.91
w=3.96
-15.47%
|
335/35-15
d=24.23
w=4.62
-10.60%
|
335/40-15
d=25.55
w=5.28
-5.74%
|
335/45-15
d=26.87
w=5.94
-0.87%
|
335/50-15
d=28.19
w=6.59
+3.99%
|
335/55-15
d=29.51
w=7.25
+8.86%
|
335/60-15
d=30.83
w=7.91
+13.73%
|
335/65-15
d=32.15
w=8.57
+18.59%
|
335/70-15
d=33.46
w=9.23
+23.46%
|
335/75-15
d=34.78
w=9.89
+28.32%
|
335/80-15
d=36.10
w=10.55
+33.19%
|
335/85-15
d=37.42
w=11.21
+38.05%
|
|
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!