| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 255/70-15 | 0.00 % | 50.00 | 1,000.00 | 29.06 | 7.03 | 178.50 |
| 325/55-15 | +0.07 % | 50.03 | 999.32 | 29.07 | 7.04 | 178.75 |
| 275/65-15 | +0.07 % | 50.03 | 999.32 | 29.07 | 7.04 | 178.75 |
| 295/60-15 | -0.41 % | 49.80 | 1,004.07 | 28.94 | 6.97 | 177.00 |
| 225/80-15 | +0.41 % | 50.20 | 995.93 | 29.17 | 7.09 | 180.00 |
| 235/75-15 | -0.61 % | 49.70 | 1,006.10 | 28.88 | 6.94 | 176.25 |
| 205/85-15 | -1.15 % | 49.42 | 1,011.52 | 28.72 | 6.86 | 174.25 |
| 215/85-15 | +1.15 % | 50.58 | 988.48 | 29.39 | 7.19 | 182.75 |
| 305/60-15 | +1.22 % | 50.61 | 987.80 | 29.41 | 7.20 | 183.00 |
| 315/55-15 | -1.42 % | 49.29 | 1,014.23 | 28.64 | 6.82 | 173.25 |
| 245/75-15 | +1.42 % | 50.71 | 985.77 | 29.47 | 7.23 | 183.75 |
| 335/55-15 | +1.56 % | 50.78 | 984.42 | 29.51 | 7.25 | 184.25 |
| 265/65-15 | -1.69 % | 49.15 | 1,016.94 | 28.56 | 6.78 | 172.25 |
| 215/80-15 | -1.76 % | 49.12 | 1,017.62 | 28.54 | 6.77 | 172.00 |
| 285/65-15 | +1.83 % | 50.91 | 981.71 | 29.59 | 7.29 | 185.25 |
| 265/70-15 | +1.90 % | 50.95 | 981.03 | 29.61 | 7.30 | 185.50 |
| 245/70-15 | -1.90 % | 49.05 | 1,018.97 | 28.50 | 6.75 | 171.50 |
| 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
-38.55%
|
145/30-15
d=18.43
w=1.71
-36.59%
|
145/35-15
d=19.00
w=2.00
-34.62%
|
145/40-15
d=19.57
w=2.28
-32.66%
|
145/45-15
d=20.14
w=2.57
-30.69%
|
145/50-15
d=20.71
w=2.85
-28.73%
|
145/55-15
d=21.28
w=3.14
-26.76%
|
145/60-15
d=21.85
w=3.43
-24.80%
|
145/65-15
d=22.42
w=3.71
-22.83%
|
145/70-15
d=22.99
w=4.00
-20.87%
|
145/75-15
d=23.56
w=4.28
-18.90%
|
145/80-15
d=24.13
w=4.57
-16.94%
|
145/85-15
d=24.70
w=4.85
-14.97%
|
| 155 |
155/25-15
d=18.05
w=1.53
-37.87%
|
155/30-15
d=18.66
w=1.83
-35.77%
|
155/35-15
d=19.27
w=2.14
-33.67%
|
155/40-15
d=19.88
w=2.44
-31.57%
|
155/45-15
d=20.49
w=2.75
-29.47%
|
155/50-15
d=21.10
w=3.05
-27.37%
|
155/55-15
d=21.71
w=3.36
-25.27%
|
155/60-15
d=22.32
w=3.66
-23.17%
|
155/65-15
d=22.93
w=3.97
-21.07%
|
155/70-15
d=23.54
w=4.27
-18.97%
|
155/75-15
d=24.15
w=4.58
-16.87%
|
155/80-15
d=24.76
w=4.88
-14.77%
|
155/85-15
d=25.37
w=5.19
-12.67%
|
| 165 |
165/25-15
d=18.25
w=1.62
-37.20%
|
165/30-15
d=18.90
w=1.95
-34.96%
|
165/35-15
d=19.55
w=2.27
-32.72%
|
165/40-15
d=20.20
w=2.60
-30.49%
|
165/45-15
d=20.85
w=2.92
-28.25%
|
165/50-15
d=21.50
w=3.25
-26.02%
|
165/55-15
d=22.15
w=3.57
-23.78%
|
165/60-15
d=22.80
w=3.90
-21.54%
|
165/65-15
d=23.44
w=4.22
-19.31%
|
165/70-15
d=24.09
w=4.55
-17.07%
|
165/75-15
d=24.74
w=4.87
-14.84%
|
165/80-15
d=25.39
w=5.20
-12.60%
|
165/85-15
d=26.04
w=5.52
-10.37%
|
| 175 |
175/25-15
d=18.44
w=1.72
-36.52%
|
175/30-15
d=19.13
w=2.07
-34.15%
|
175/35-15
d=19.82
w=2.41
-31.78%
|
175/40-15
d=20.51
w=2.76
-29.40%
|
175/45-15
d=21.20
w=3.10
-27.03%
|
175/50-15
d=21.89
w=3.44
-24.66%
|
175/55-15
d=22.58
w=3.79
-22.29%
|
175/60-15
d=23.27
w=4.13
-19.92%
|
175/65-15
d=23.96
w=4.48
-17.55%
|
175/70-15
d=24.65
w=4.82
-15.18%
|
175/75-15
d=25.33
w=5.17
-12.80%
|
175/80-15
d=26.02
w=5.51
-10.43%
|
175/85-15
d=26.71
w=5.86
-8.06%
|
| 185 |
185/25-15
d=18.64
w=1.82
-35.84%
|
185/30-15
d=19.37
w=2.19
-33.33%
|
185/35-15
d=20.10
w=2.55
-30.83%
|
185/40-15
d=20.83
w=2.91
-28.32%
|
185/45-15
d=21.56
w=3.28
-25.81%
|
185/50-15
d=22.28
w=3.64
-23.31%
|
185/55-15
d=23.01
w=4.01
-20.80%
|
185/60-15
d=23.74
w=4.37
-18.29%
|
185/65-15
d=24.47
w=4.73
-15.79%
|
185/70-15
d=25.20
w=5.10
-13.28%
|
185/75-15
d=25.93
w=5.46
-10.77%
|
185/80-15
d=26.65
w=5.83
-8.27%
|
185/85-15
d=27.38
w=6.19
-5.76%
|
| 195 |
195/25-15
d=18.84
w=1.92
-35.16%
|
195/30-15
d=19.61
w=2.30
-32.52%
|
195/35-15
d=20.37
w=2.69
-29.88%
|
195/40-15
d=21.14
w=3.07
-27.24%
|
195/45-15
d=21.91
w=3.45
-24.59%
|
195/50-15
d=22.68
w=3.84
-21.95%
|
195/55-15
d=23.44
w=4.22
-19.31%
|
195/60-15
d=24.21
w=4.61
-16.67%
|
195/65-15
d=24.98
w=4.99
-14.02%
|
195/70-15
d=25.75
w=5.37
-11.38%
|
195/75-15
d=26.52
w=5.76
-8.74%
|
195/80-15
d=27.28
w=6.14
-6.10%
|
195/85-15
d=28.05
w=6.53
-3.46%
|
| 205 |
205/25-15
d=19.04
w=2.02
-34.49%
|
205/30-15
d=19.84
w=2.42
-31.71%
|
205/35-15
d=20.65
w=2.82
-28.93%
|
205/40-15
d=21.46
w=3.23
-26.15%
|
205/45-15
d=22.26
w=3.63
-23.37%
|
205/50-15
d=23.07
w=4.04
-20.60%
|
205/55-15
d=23.88
w=4.44
-17.82%
|
205/60-15
d=24.69
w=4.84
-15.04%
|
205/65-15
d=25.49
w=5.25
-12.26%
|
205/70-15
d=26.30
w=5.65
-9.49%
|
205/75-15
d=27.11
w=6.05
-6.71%
|
205/80-15
d=27.91
w=6.46
-3.93%
|
205/85-15
d=28.72
w=6.86
-1.15%
|
| 215 |
215/25-15
d=19.23
w=2.12
-33.81%
|
215/30-15
d=20.08
w=2.54
-30.89%
|
215/35-15
d=20.93
w=2.96
-27.98%
|
215/40-15
d=21.77
w=3.39
-25.07%
|
215/45-15
d=22.62
w=3.81
-22.15%
|
215/50-15
d=23.46
w=4.23
-19.24%
|
215/55-15
d=24.31
w=4.66
-16.33%
|
215/60-15
d=25.16
w=5.08
-13.41%
|
215/65-15
d=26.00
w=5.50
-10.50%
|
215/70-15
d=26.85
w=5.93
-7.59%
|
215/75-15
d=27.70
w=6.35
-4.67%
|
215/80-15
d=28.54
w=6.77
-1.76%
|
215/85-15
d=29.39
w=7.19
+1.15%
|
| 225 |
225/25-15
d=19.43
w=2.21
-33.13%
|
225/30-15
d=20.31
w=2.66
-30.08%
|
225/35-15
d=21.20
w=3.10
-27.03%
|
225/40-15
d=22.09
w=3.54
-23.98%
|
225/45-15
d=22.97
w=3.99
-20.93%
|
225/50-15
d=23.86
w=4.43
-17.89%
|
225/55-15
d=24.74
w=4.87
-14.84%
|
225/60-15
d=25.63
w=5.31
-11.79%
|
225/65-15
d=26.52
w=5.76
-8.74%
|
225/70-15
d=27.40
w=6.20
-5.69%
|
225/75-15
d=28.29
w=6.64
-2.64%
|
225/80-15
d=29.17
w=7.09
+0.41%
|
225/85-15
d=30.06
w=7.53
+3.46%
|
| 235 |
235/25-15
d=19.63
w=2.31
-32.45%
|
235/30-15
d=20.55
w=2.78
-29.27%
|
235/35-15
d=21.48
w=3.24
-26.08%
|
235/40-15
d=22.40
w=3.70
-22.90%
|
235/45-15
d=23.33
w=4.16
-19.72%
|
235/50-15
d=24.25
w=4.63
-16.53%
|
235/55-15
d=25.18
w=5.09
-13.35%
|
235/60-15
d=26.10
w=5.55
-10.16%
|
235/65-15
d=27.03
w=6.01
-6.98%
|
235/70-15
d=27.95
w=6.48
-3.79%
|
235/75-15
d=28.88
w=6.94
-0.61%
|
235/80-15
d=29.80
w=7.40
+2.57%
|
235/85-15
d=30.73
w=7.86
+5.76%
|
| 245 |
245/25-15
d=19.82
w=2.41
-31.78%
|
245/30-15
d=20.79
w=2.89
-28.46%
|
245/35-15
d=21.75
w=3.38
-25.14%
|
245/40-15
d=22.72
w=3.86
-21.82%
|
245/45-15
d=23.68
w=4.34
-18.50%
|
245/50-15
d=24.65
w=4.82
-15.18%
|
245/55-15
d=25.61
w=5.31
-11.86%
|
245/60-15
d=26.57
w=5.79
-8.54%
|
245/65-15
d=27.54
w=6.27
-5.22%
|
245/70-15
d=28.50
w=6.75
-1.90%
|
245/75-15
d=29.47
w=7.23
+1.42%
|
245/80-15
d=30.43
w=7.72
+4.74%
|
245/85-15
d=31.40
w=8.20
+8.06%
|
| 255 |
255/25-15
d=20.02
w=2.51
-31.10%
|
255/30-15
d=21.02
w=3.01
-27.64%
|
255/35-15
d=22.03
w=3.51
-24.19%
|
255/40-15
d=23.03
w=4.02
-20.73%
|
255/45-15
d=24.04
w=4.52
-17.28%
|
255/50-15
d=25.04
w=5.02
-13.82%
|
255/55-15
d=26.04
w=5.52
-10.37%
|
255/60-15
d=27.05
w=6.02
-6.91%
|
255/65-15
d=28.05
w=6.53
-3.46%
|
255/70-15
d=29.06
w=7.03
0.00%
|
255/75-15
d=30.06
w=7.53
+3.46%
|
255/80-15
d=31.06
w=8.03
+6.91%
|
255/85-15
d=32.07
w=8.53
+10.37%
|
| 265 |
265/25-15
d=20.22
w=2.61
-30.42%
|
265/30-15
d=21.26
w=3.13
-26.83%
|
265/35-15
d=22.30
w=3.65
-23.24%
|
265/40-15
d=23.35
w=4.17
-19.65%
|
265/45-15
d=24.39
w=4.69
-16.06%
|
265/50-15
d=25.43
w=5.22
-12.47%
|
265/55-15
d=26.48
w=5.74
-8.88%
|
265/60-15
d=27.52
w=6.26
-5.28%
|
265/65-15
d=28.56
w=6.78
-1.69%
|
265/70-15
d=29.61
w=7.30
+1.90%
|
265/75-15
d=30.65
w=7.82
+5.49%
|
265/80-15
d=31.69
w=8.35
+9.08%
|
265/85-15
d=32.74
w=8.87
+12.67%
|
| 275 |
275/25-15
d=20.41
w=2.71
-29.74%
|
275/30-15
d=21.50
w=3.25
-26.02%
|
275/35-15
d=22.58
w=3.79
-22.29%
|
275/40-15
d=23.66
w=4.33
-18.56%
|
275/45-15
d=24.74
w=4.87
-14.84%
|
275/50-15
d=25.83
w=5.41
-11.11%
|
275/55-15
d=26.91
w=5.95
-7.38%
|
275/60-15
d=27.99
w=6.50
-3.66%
|
275/65-15
d=29.07
w=7.04
+0.07%
|
275/70-15
d=30.16
w=7.58
+3.79%
|
275/75-15
d=31.24
w=8.12
+7.52%
|
275/80-15
d=32.32
w=8.66
+11.25%
|
275/85-15
d=33.41
w=9.20
+14.97%
|
| 285 |
285/25-15
d=20.61
w=2.81
-29.07%
|
285/30-15
d=21.73
w=3.37
-25.20%
|
285/35-15
d=22.85
w=3.93
-21.34%
|
285/40-15
d=23.98
w=4.49
-17.48%
|
285/45-15
d=25.10
w=5.05
-13.62%
|
285/50-15
d=26.22
w=5.61
-9.76%
|
285/55-15
d=27.34
w=6.17
-5.89%
|
285/60-15
d=28.46
w=6.73
-2.03%
|
285/65-15
d=29.59
w=7.29
+1.83%
|
285/70-15
d=30.71
w=7.85
+5.69%
|
285/75-15
d=31.83
w=8.42
+9.55%
|
285/80-15
d=32.95
w=8.98
+13.41%
|
285/85-15
d=34.07
w=9.54
+17.28%
|
| 295 |
295/25-15
d=20.81
w=2.90
-28.39%
|
295/30-15
d=21.97
w=3.48
-24.39%
|
295/35-15
d=23.13
w=4.06
-20.39%
|
295/40-15
d=24.29
w=4.65
-16.40%
|
295/45-15
d=25.45
w=5.23
-12.40%
|
295/50-15
d=26.61
w=5.81
-8.40%
|
295/55-15
d=27.78
w=6.39
-4.40%
|
295/60-15
d=28.94
w=6.97
-0.41%
|
295/65-15
d=30.10
w=7.55
+3.59%
|
295/70-15
d=31.26
w=8.13
+7.59%
|
295/75-15
d=32.42
w=8.71
+11.59%
|
295/80-15
d=33.58
w=9.29
+15.58%
|
295/85-15
d=34.74
w=9.87
+19.58%
|
| 305 |
305/25-15
d=21.00
w=3.00
-27.71%
|
305/30-15
d=22.20
w=3.60
-23.58%
|
305/35-15
d=23.41
w=4.20
-19.44%
|
305/40-15
d=24.61
w=4.80
-15.31%
|
305/45-15
d=25.81
w=5.40
-11.18%
|
305/50-15
d=27.01
w=6.00
-7.05%
|
305/55-15
d=28.21
w=6.60
-2.91%
|
305/60-15
d=29.41
w=7.20
+1.22%
|
305/65-15
d=30.61
w=7.81
+5.35%
|
305/70-15
d=31.81
w=8.41
+9.49%
|
305/75-15
d=33.01
w=9.01
+13.62%
|
305/80-15
d=34.21
w=9.61
+17.75%
|
305/85-15
d=35.41
w=10.21
+21.88%
|
| 315 |
315/25-15
d=21.20
w=3.10
-27.03%
|
315/30-15
d=22.44
w=3.72
-22.76%
|
315/35-15
d=23.68
w=4.34
-18.50%
|
315/40-15
d=24.92
w=4.96
-14.23%
|
315/45-15
d=26.16
w=5.58
-9.96%
|
315/50-15
d=27.40
w=6.20
-5.69%
|
315/55-15
d=28.64
w=6.82
-1.42%
|
315/60-15
d=29.88
w=7.44
+2.85%
|
315/65-15
d=31.12
w=8.06
+7.11%
|
315/70-15
d=32.36
w=8.68
+11.38%
|
315/75-15
d=33.60
w=9.30
+15.65%
|
315/80-15
d=34.84
w=9.92
+19.92%
|
315/85-15
d=36.08
w=10.54
+24.19%
|
| 325 |
325/25-15
d=21.40
w=3.20
-26.36%
|
325/30-15
d=22.68
w=3.84
-21.95%
|
325/35-15
d=23.96
w=4.48
-17.55%
|
325/40-15
d=25.24
w=5.12
-13.14%
|
325/45-15
d=26.52
w=5.76
-8.74%
|
325/50-15
d=27.80
w=6.40
-4.34%
|
325/55-15
d=29.07
w=7.04
+0.07%
|
325/60-15
d=30.35
w=7.68
+4.47%
|
325/65-15
d=31.63
w=8.32
+8.88%
|
325/70-15
d=32.91
w=8.96
+13.28%
|
325/75-15
d=34.19
w=9.60
+17.68%
|
325/80-15
d=35.47
w=10.24
+22.09%
|
325/85-15
d=36.75
w=10.88
+26.49%
|
| 335 |
335/25-15
d=21.59
w=3.30
-25.68%
|
335/30-15
d=22.91
w=3.96
-21.14%
|
335/35-15
d=24.23
w=4.62
-16.60%
|
335/40-15
d=25.55
w=5.28
-12.06%
|
335/45-15
d=26.87
w=5.94
-7.52%
|
335/50-15
d=28.19
w=6.59
-2.98%
|
335/55-15
d=29.51
w=7.25
+1.56%
|
335/60-15
d=30.83
w=7.91
+6.10%
|
335/65-15
d=32.15
w=8.57
+10.64%
|
335/70-15
d=33.46
w=9.23
+15.18%
|
335/75-15
d=34.78
w=9.89
+19.72%
|
335/80-15
d=36.10
w=10.55
+24.25%
|
335/85-15
d=37.42
w=11.21
+28.79%
|
|
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!