| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 165/80-15 | 0.00 % | 50.00 | 1,000.00 | 25.39 | 5.20 | 132.00 |
| 155/85-15 | -0.08 % | 49.96 | 1,000.78 | 25.37 | 5.19 | 131.75 |
| 265/50-15 | +0.16 % | 50.08 | 998.45 | 25.43 | 5.22 | 132.50 |
| 295/45-15 | +0.23 % | 50.12 | 997.67 | 25.45 | 5.23 | 132.75 |
| 175/75-15 | -0.23 % | 49.88 | 1,002.33 | 25.33 | 5.17 | 131.25 |
| 205/65-15 | +0.39 % | 50.19 | 996.12 | 25.49 | 5.25 | 133.25 |
| 325/40-15 | -0.62 % | 49.69 | 1,006.20 | 25.24 | 5.12 | 130.00 |
| 335/40-15 | +0.62 % | 50.31 | 993.80 | 25.55 | 5.28 | 134.00 |
| 185/70-15 | -0.78 % | 49.61 | 1,007.75 | 25.20 | 5.10 | 129.50 |
| 245/55-15 | +0.85 % | 50.43 | 991.47 | 25.61 | 5.31 | 134.75 |
| 235/55-15 | -0.85 % | 49.57 | 1,008.53 | 25.18 | 5.09 | 129.25 |
| 225/60-15 | +0.93 % | 50.47 | 990.70 | 25.63 | 5.31 | 135.00 |
| 215/60-15 | -0.93 % | 49.53 | 1,009.30 | 25.16 | 5.08 | 129.00 |
| 285/45-15 | -1.16 % | 49.42 | 1,011.63 | 25.10 | 5.05 | 128.25 |
| 195/70-15 | +1.40 % | 50.70 | 986.05 | 25.75 | 5.37 | 136.50 |
| 255/50-15 | -1.40 % | 49.30 | 1,013.95 | 25.04 | 5.02 | 127.50 |
| 305/45-15 | +1.63 % | 50.81 | 983.72 | 25.81 | 5.40 | 137.25 |
| 195/65-15 | -1.63 % | 49.19 | 1,016.28 | 24.98 | 4.99 | 126.75 |
| 275/50-15 | +1.71 % | 50.85 | 982.95 | 25.83 | 5.41 | 137.50 |
| 315/40-15 | -1.86 % | 49.07 | 1,018.60 | 24.92 | 4.96 | 126.00 |
| 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
-29.69%
|
145/30-15
d=18.43
w=1.71
-27.44%
|
145/35-15
d=19.00
w=2.00
-25.19%
|
145/40-15
d=19.57
w=2.28
-22.95%
|
145/45-15
d=20.14
w=2.57
-20.70%
|
145/50-15
d=20.71
w=2.85
-18.45%
|
145/55-15
d=21.28
w=3.14
-16.20%
|
145/60-15
d=21.85
w=3.43
-13.95%
|
145/65-15
d=22.42
w=3.71
-11.71%
|
145/70-15
d=22.99
w=4.00
-9.46%
|
145/75-15
d=23.56
w=4.28
-7.21%
|
145/80-15
d=24.13
w=4.57
-4.96%
|
145/85-15
d=24.70
w=4.85
-2.71%
|
| 155 |
155/25-15
d=18.05
w=1.53
-28.91%
|
155/30-15
d=18.66
w=1.83
-26.51%
|
155/35-15
d=19.27
w=2.14
-24.11%
|
155/40-15
d=19.88
w=2.44
-21.71%
|
155/45-15
d=20.49
w=2.75
-19.30%
|
155/50-15
d=21.10
w=3.05
-16.90%
|
155/55-15
d=21.71
w=3.36
-14.50%
|
155/60-15
d=22.32
w=3.66
-12.09%
|
155/65-15
d=22.93
w=3.97
-9.69%
|
155/70-15
d=23.54
w=4.27
-7.29%
|
155/75-15
d=24.15
w=4.58
-4.88%
|
155/80-15
d=24.76
w=4.88
-2.48%
|
155/85-15
d=25.37
w=5.19
-0.08%
|
| 165 |
165/25-15
d=18.25
w=1.62
-28.14%
|
165/30-15
d=18.90
w=1.95
-25.58%
|
165/35-15
d=19.55
w=2.27
-23.02%
|
165/40-15
d=20.20
w=2.60
-20.47%
|
165/45-15
d=20.85
w=2.92
-17.91%
|
165/50-15
d=21.50
w=3.25
-15.35%
|
165/55-15
d=22.15
w=3.57
-12.79%
|
165/60-15
d=22.80
w=3.90
-10.23%
|
165/65-15
d=23.44
w=4.22
-7.67%
|
165/70-15
d=24.09
w=4.55
-5.12%
|
165/75-15
d=24.74
w=4.87
-2.56%
|
165/80-15
d=25.39
w=5.20
0.00%
|
165/85-15
d=26.04
w=5.52
+2.56%
|
| 175 |
175/25-15
d=18.44
w=1.72
-27.36%
|
175/30-15
d=19.13
w=2.07
-24.65%
|
175/35-15
d=19.82
w=2.41
-21.94%
|
175/40-15
d=20.51
w=2.76
-19.22%
|
175/45-15
d=21.20
w=3.10
-16.51%
|
175/50-15
d=21.89
w=3.44
-13.80%
|
175/55-15
d=22.58
w=3.79
-11.09%
|
175/60-15
d=23.27
w=4.13
-8.37%
|
175/65-15
d=23.96
w=4.48
-5.66%
|
175/70-15
d=24.65
w=4.82
-2.95%
|
175/75-15
d=25.33
w=5.17
-0.23%
|
175/80-15
d=26.02
w=5.51
+2.48%
|
175/85-15
d=26.71
w=5.86
+5.19%
|
| 185 |
185/25-15
d=18.64
w=1.82
-26.59%
|
185/30-15
d=19.37
w=2.19
-23.72%
|
185/35-15
d=20.10
w=2.55
-20.85%
|
185/40-15
d=20.83
w=2.91
-17.98%
|
185/45-15
d=21.56
w=3.28
-15.12%
|
185/50-15
d=22.28
w=3.64
-12.25%
|
185/55-15
d=23.01
w=4.01
-9.38%
|
185/60-15
d=23.74
w=4.37
-6.51%
|
185/65-15
d=24.47
w=4.73
-3.64%
|
185/70-15
d=25.20
w=5.10
-0.78%
|
185/75-15
d=25.93
w=5.46
+2.09%
|
185/80-15
d=26.65
w=5.83
+4.96%
|
185/85-15
d=27.38
w=6.19
+7.83%
|
| 195 |
195/25-15
d=18.84
w=1.92
-25.81%
|
195/30-15
d=19.61
w=2.30
-22.79%
|
195/35-15
d=20.37
w=2.69
-19.77%
|
195/40-15
d=21.14
w=3.07
-16.74%
|
195/45-15
d=21.91
w=3.45
-13.72%
|
195/50-15
d=22.68
w=3.84
-10.70%
|
195/55-15
d=23.44
w=4.22
-7.67%
|
195/60-15
d=24.21
w=4.61
-4.65%
|
195/65-15
d=24.98
w=4.99
-1.63%
|
195/70-15
d=25.75
w=5.37
+1.40%
|
195/75-15
d=26.52
w=5.76
+4.42%
|
195/80-15
d=27.28
w=6.14
+7.44%
|
195/85-15
d=28.05
w=6.53
+10.47%
|
| 205 |
205/25-15
d=19.04
w=2.02
-25.04%
|
205/30-15
d=19.84
w=2.42
-21.86%
|
205/35-15
d=20.65
w=2.82
-18.68%
|
205/40-15
d=21.46
w=3.23
-15.50%
|
205/45-15
d=22.26
w=3.63
-12.33%
|
205/50-15
d=23.07
w=4.04
-9.15%
|
205/55-15
d=23.88
w=4.44
-5.97%
|
205/60-15
d=24.69
w=4.84
-2.79%
|
205/65-15
d=25.49
w=5.25
+0.39%
|
205/70-15
d=26.30
w=5.65
+3.57%
|
205/75-15
d=27.11
w=6.05
+6.74%
|
205/80-15
d=27.91
w=6.46
+9.92%
|
205/85-15
d=28.72
w=6.86
+13.10%
|
| 215 |
215/25-15
d=19.23
w=2.12
-24.26%
|
215/30-15
d=20.08
w=2.54
-20.93%
|
215/35-15
d=20.93
w=2.96
-17.60%
|
215/40-15
d=21.77
w=3.39
-14.26%
|
215/45-15
d=22.62
w=3.81
-10.93%
|
215/50-15
d=23.46
w=4.23
-7.60%
|
215/55-15
d=24.31
w=4.66
-4.26%
|
215/60-15
d=25.16
w=5.08
-0.93%
|
215/65-15
d=26.00
w=5.50
+2.40%
|
215/70-15
d=26.85
w=5.93
+5.74%
|
215/75-15
d=27.70
w=6.35
+9.07%
|
215/80-15
d=28.54
w=6.77
+12.40%
|
215/85-15
d=29.39
w=7.19
+15.74%
|
| 225 |
225/25-15
d=19.43
w=2.21
-23.49%
|
225/30-15
d=20.31
w=2.66
-20.00%
|
225/35-15
d=21.20
w=3.10
-16.51%
|
225/40-15
d=22.09
w=3.54
-13.02%
|
225/45-15
d=22.97
w=3.99
-9.53%
|
225/50-15
d=23.86
w=4.43
-6.05%
|
225/55-15
d=24.74
w=4.87
-2.56%
|
225/60-15
d=25.63
w=5.31
+0.93%
|
225/65-15
d=26.52
w=5.76
+4.42%
|
225/70-15
d=27.40
w=6.20
+7.91%
|
225/75-15
d=28.29
w=6.64
+11.40%
|
225/80-15
d=29.17
w=7.09
+14.88%
|
225/85-15
d=30.06
w=7.53
+18.37%
|
| 235 |
235/25-15
d=19.63
w=2.31
-22.71%
|
235/30-15
d=20.55
w=2.78
-19.07%
|
235/35-15
d=21.48
w=3.24
-15.43%
|
235/40-15
d=22.40
w=3.70
-11.78%
|
235/45-15
d=23.33
w=4.16
-8.14%
|
235/50-15
d=24.25
w=4.63
-4.50%
|
235/55-15
d=25.18
w=5.09
-0.85%
|
235/60-15
d=26.10
w=5.55
+2.79%
|
235/65-15
d=27.03
w=6.01
+6.43%
|
235/70-15
d=27.95
w=6.48
+10.08%
|
235/75-15
d=28.88
w=6.94
+13.72%
|
235/80-15
d=29.80
w=7.40
+17.36%
|
235/85-15
d=30.73
w=7.86
+21.01%
|
| 245 |
245/25-15
d=19.82
w=2.41
-21.94%
|
245/30-15
d=20.79
w=2.89
-18.14%
|
245/35-15
d=21.75
w=3.38
-14.34%
|
245/40-15
d=22.72
w=3.86
-10.54%
|
245/45-15
d=23.68
w=4.34
-6.74%
|
245/50-15
d=24.65
w=4.82
-2.95%
|
245/55-15
d=25.61
w=5.31
+0.85%
|
245/60-15
d=26.57
w=5.79
+4.65%
|
245/65-15
d=27.54
w=6.27
+8.45%
|
245/70-15
d=28.50
w=6.75
+12.25%
|
245/75-15
d=29.47
w=7.23
+16.05%
|
245/80-15
d=30.43
w=7.72
+19.84%
|
245/85-15
d=31.40
w=8.20
+23.64%
|
| 255 |
255/25-15
d=20.02
w=2.51
-21.16%
|
255/30-15
d=21.02
w=3.01
-17.21%
|
255/35-15
d=22.03
w=3.51
-13.26%
|
255/40-15
d=23.03
w=4.02
-9.30%
|
255/45-15
d=24.04
w=4.52
-5.35%
|
255/50-15
d=25.04
w=5.02
-1.40%
|
255/55-15
d=26.04
w=5.52
+2.56%
|
255/60-15
d=27.05
w=6.02
+6.51%
|
255/65-15
d=28.05
w=6.53
+10.47%
|
255/70-15
d=29.06
w=7.03
+14.42%
|
255/75-15
d=30.06
w=7.53
+18.37%
|
255/80-15
d=31.06
w=8.03
+22.33%
|
255/85-15
d=32.07
w=8.53
+26.28%
|
| 265 |
265/25-15
d=20.22
w=2.61
-20.39%
|
265/30-15
d=21.26
w=3.13
-16.28%
|
265/35-15
d=22.30
w=3.65
-12.17%
|
265/40-15
d=23.35
w=4.17
-8.06%
|
265/45-15
d=24.39
w=4.69
-3.95%
|
265/50-15
d=25.43
w=5.22
+0.16%
|
265/55-15
d=26.48
w=5.74
+4.26%
|
265/60-15
d=27.52
w=6.26
+8.37%
|
265/65-15
d=28.56
w=6.78
+12.48%
|
265/70-15
d=29.61
w=7.30
+16.59%
|
265/75-15
d=30.65
w=7.82
+20.70%
|
265/80-15
d=31.69
w=8.35
+24.81%
|
265/85-15
d=32.74
w=8.87
+28.91%
|
| 275 |
275/25-15
d=20.41
w=2.71
-19.61%
|
275/30-15
d=21.50
w=3.25
-15.35%
|
275/35-15
d=22.58
w=3.79
-11.09%
|
275/40-15
d=23.66
w=4.33
-6.82%
|
275/45-15
d=24.74
w=4.87
-2.56%
|
275/50-15
d=25.83
w=5.41
+1.71%
|
275/55-15
d=26.91
w=5.95
+5.97%
|
275/60-15
d=27.99
w=6.50
+10.23%
|
275/65-15
d=29.07
w=7.04
+14.50%
|
275/70-15
d=30.16
w=7.58
+18.76%
|
275/75-15
d=31.24
w=8.12
+23.02%
|
275/80-15
d=32.32
w=8.66
+27.29%
|
275/85-15
d=33.41
w=9.20
+31.55%
|
| 285 |
285/25-15
d=20.61
w=2.81
-18.84%
|
285/30-15
d=21.73
w=3.37
-14.42%
|
285/35-15
d=22.85
w=3.93
-10.00%
|
285/40-15
d=23.98
w=4.49
-5.58%
|
285/45-15
d=25.10
w=5.05
-1.16%
|
285/50-15
d=26.22
w=5.61
+3.26%
|
285/55-15
d=27.34
w=6.17
+7.67%
|
285/60-15
d=28.46
w=6.73
+12.09%
|
285/65-15
d=29.59
w=7.29
+16.51%
|
285/70-15
d=30.71
w=7.85
+20.93%
|
285/75-15
d=31.83
w=8.42
+25.35%
|
285/80-15
d=32.95
w=8.98
+29.77%
|
285/85-15
d=34.07
w=9.54
+34.19%
|
| 295 |
295/25-15
d=20.81
w=2.90
-18.06%
|
295/30-15
d=21.97
w=3.48
-13.49%
|
295/35-15
d=23.13
w=4.06
-8.91%
|
295/40-15
d=24.29
w=4.65
-4.34%
|
295/45-15
d=25.45
w=5.23
+0.23%
|
295/50-15
d=26.61
w=5.81
+4.81%
|
295/55-15
d=27.78
w=6.39
+9.38%
|
295/60-15
d=28.94
w=6.97
+13.95%
|
295/65-15
d=30.10
w=7.55
+18.53%
|
295/70-15
d=31.26
w=8.13
+23.10%
|
295/75-15
d=32.42
w=8.71
+27.67%
|
295/80-15
d=33.58
w=9.29
+32.25%
|
295/85-15
d=34.74
w=9.87
+36.82%
|
| 305 |
305/25-15
d=21.00
w=3.00
-17.29%
|
305/30-15
d=22.20
w=3.60
-12.56%
|
305/35-15
d=23.41
w=4.20
-7.83%
|
305/40-15
d=24.61
w=4.80
-3.10%
|
305/45-15
d=25.81
w=5.40
+1.63%
|
305/50-15
d=27.01
w=6.00
+6.36%
|
305/55-15
d=28.21
w=6.60
+11.09%
|
305/60-15
d=29.41
w=7.20
+15.81%
|
305/65-15
d=30.61
w=7.81
+20.54%
|
305/70-15
d=31.81
w=8.41
+25.27%
|
305/75-15
d=33.01
w=9.01
+30.00%
|
305/80-15
d=34.21
w=9.61
+34.73%
|
305/85-15
d=35.41
w=10.21
+39.46%
|
| 315 |
315/25-15
d=21.20
w=3.10
-16.51%
|
315/30-15
d=22.44
w=3.72
-11.63%
|
315/35-15
d=23.68
w=4.34
-6.74%
|
315/40-15
d=24.92
w=4.96
-1.86%
|
315/45-15
d=26.16
w=5.58
+3.02%
|
315/50-15
d=27.40
w=6.20
+7.91%
|
315/55-15
d=28.64
w=6.82
+12.79%
|
315/60-15
d=29.88
w=7.44
+17.67%
|
315/65-15
d=31.12
w=8.06
+22.56%
|
315/70-15
d=32.36
w=8.68
+27.44%
|
315/75-15
d=33.60
w=9.30
+32.33%
|
315/80-15
d=34.84
w=9.92
+37.21%
|
315/85-15
d=36.08
w=10.54
+42.09%
|
| 325 |
325/25-15
d=21.40
w=3.20
-15.74%
|
325/30-15
d=22.68
w=3.84
-10.70%
|
325/35-15
d=23.96
w=4.48
-5.66%
|
325/40-15
d=25.24
w=5.12
-0.62%
|
325/45-15
d=26.52
w=5.76
+4.42%
|
325/50-15
d=27.80
w=6.40
+9.46%
|
325/55-15
d=29.07
w=7.04
+14.50%
|
325/60-15
d=30.35
w=7.68
+19.53%
|
325/65-15
d=31.63
w=8.32
+24.57%
|
325/70-15
d=32.91
w=8.96
+29.61%
|
325/75-15
d=34.19
w=9.60
+34.65%
|
325/80-15
d=35.47
w=10.24
+39.69%
|
325/85-15
d=36.75
w=10.88
+44.73%
|
| 335 |
335/25-15
d=21.59
w=3.30
-14.96%
|
335/30-15
d=22.91
w=3.96
-9.77%
|
335/35-15
d=24.23
w=4.62
-4.57%
|
335/40-15
d=25.55
w=5.28
+0.62%
|
335/45-15
d=26.87
w=5.94
+5.81%
|
335/50-15
d=28.19
w=6.59
+11.01%
|
335/55-15
d=29.51
w=7.25
+16.20%
|
335/60-15
d=30.83
w=7.91
+21.40%
|
335/65-15
d=32.15
w=8.57
+26.59%
|
335/70-15
d=33.46
w=9.23
+31.78%
|
335/75-15
d=34.78
w=9.89
+36.98%
|
335/80-15
d=36.10
w=10.55
+42.17%
|
335/85-15
d=37.42
w=11.21
+47.36%
|
|
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!