| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 205/60-15 | 0.00 % | 50.00 | 1,000.00 | 24.69 | 4.84 | 123.00 |
| 145/85-15 | +0.08 % | 50.04 | 999.20 | 24.70 | 4.85 | 123.25 |
| 245/50-15 | -0.16 % | 49.92 | 1,001.59 | 24.65 | 4.82 | 122.50 |
| 175/70-15 | -0.16 % | 49.92 | 1,001.59 | 24.65 | 4.82 | 122.50 |
| 275/45-15 | +0.24 % | 50.12 | 997.61 | 24.74 | 4.87 | 123.75 |
| 225/55-15 | +0.24 % | 50.12 | 997.61 | 24.74 | 4.87 | 123.75 |
| 165/75-15 | +0.24 % | 50.12 | 997.61 | 24.74 | 4.87 | 123.75 |
| 305/40-15 | -0.32 % | 49.84 | 1,003.19 | 24.61 | 4.80 | 122.00 |
| 155/80-15 | +0.32 % | 50.16 | 996.81 | 24.76 | 4.88 | 124.00 |
| 185/65-15 | -0.88 % | 49.56 | 1,008.77 | 24.47 | 4.73 | 120.25 |
| 315/40-15 | +0.96 % | 50.48 | 990.43 | 24.92 | 4.96 | 126.00 |
| 265/45-15 | -1.20 % | 49.40 | 1,011.96 | 24.39 | 4.69 | 119.25 |
| 195/65-15 | +1.20 % | 50.60 | 988.04 | 24.98 | 4.99 | 126.75 |
| 255/50-15 | +1.44 % | 50.72 | 985.65 | 25.04 | 5.02 | 127.50 |
| 215/55-15 | -1.52 % | 49.24 | 1,015.15 | 24.31 | 4.66 | 118.25 |
| 295/40-15 | -1.59 % | 49.20 | 1,015.95 | 24.29 | 4.65 | 118.00 |
| 285/45-15 | +1.67 % | 50.84 | 983.25 | 25.10 | 5.05 | 128.25 |
| 235/50-15 | -1.75 % | 49.12 | 1,017.54 | 24.25 | 4.63 | 117.50 |
| 335/35-15 | -1.83 % | 49.08 | 1,018.34 | 24.23 | 4.62 | 117.25 |
| 215/60-15 | +1.91 % | 50.96 | 980.86 | 25.16 | 5.08 | 129.00 |
| 195/60-15 | -1.91 % | 49.04 | 1,019.14 | 24.21 | 4.61 | 117.00 |
| 235/55-15 | +1.99 % | 51.00 | 980.06 | 25.18 | 5.09 | 129.25 |
| 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
-27.67%
|
145/30-15
d=18.43
w=1.71
-25.36%
|
145/35-15
d=19.00
w=2.00
-23.05%
|
145/40-15
d=19.57
w=2.28
-20.73%
|
145/45-15
d=20.14
w=2.57
-18.42%
|
145/50-15
d=20.71
w=2.85
-16.11%
|
145/55-15
d=21.28
w=3.14
-13.80%
|
145/60-15
d=21.85
w=3.43
-11.48%
|
145/65-15
d=22.42
w=3.71
-9.17%
|
145/70-15
d=22.99
w=4.00
-6.86%
|
145/75-15
d=23.56
w=4.28
-4.55%
|
145/80-15
d=24.13
w=4.57
-2.23%
|
145/85-15
d=24.70
w=4.85
+0.08%
|
| 155 |
155/25-15
d=18.05
w=1.53
-26.87%
|
155/30-15
d=18.66
w=1.83
-24.40%
|
155/35-15
d=19.27
w=2.14
-21.93%
|
155/40-15
d=19.88
w=2.44
-19.46%
|
155/45-15
d=20.49
w=2.75
-16.99%
|
155/50-15
d=21.10
w=3.05
-14.51%
|
155/55-15
d=21.71
w=3.36
-12.04%
|
155/60-15
d=22.32
w=3.66
-9.57%
|
155/65-15
d=22.93
w=3.97
-7.10%
|
155/70-15
d=23.54
w=4.27
-4.63%
|
155/75-15
d=24.15
w=4.58
-2.15%
|
155/80-15
d=24.76
w=4.88
+0.32%
|
155/85-15
d=25.37
w=5.19
+2.79%
|
| 165 |
165/25-15
d=18.25
w=1.62
-26.08%
|
165/30-15
d=18.90
w=1.95
-23.44%
|
165/35-15
d=19.55
w=2.27
-20.81%
|
165/40-15
d=20.20
w=2.60
-18.18%
|
165/45-15
d=20.85
w=2.92
-15.55%
|
165/50-15
d=21.50
w=3.25
-12.92%
|
165/55-15
d=22.15
w=3.57
-10.29%
|
165/60-15
d=22.80
w=3.90
-7.66%
|
165/65-15
d=23.44
w=4.22
-5.02%
|
165/70-15
d=24.09
w=4.55
-2.39%
|
165/75-15
d=24.74
w=4.87
+0.24%
|
165/80-15
d=25.39
w=5.20
+2.87%
|
165/85-15
d=26.04
w=5.52
+5.50%
|
| 175 |
175/25-15
d=18.44
w=1.72
-25.28%
|
175/30-15
d=19.13
w=2.07
-22.49%
|
175/35-15
d=19.82
w=2.41
-19.70%
|
175/40-15
d=20.51
w=2.76
-16.91%
|
175/45-15
d=21.20
w=3.10
-14.11%
|
175/50-15
d=21.89
w=3.44
-11.32%
|
175/55-15
d=22.58
w=3.79
-8.53%
|
175/60-15
d=23.27
w=4.13
-5.74%
|
175/65-15
d=23.96
w=4.48
-2.95%
|
175/70-15
d=24.65
w=4.82
-0.16%
|
175/75-15
d=25.33
w=5.17
+2.63%
|
175/80-15
d=26.02
w=5.51
+5.42%
|
175/85-15
d=26.71
w=5.86
+8.21%
|
| 185 |
185/25-15
d=18.64
w=1.82
-24.48%
|
185/30-15
d=19.37
w=2.19
-21.53%
|
185/35-15
d=20.10
w=2.55
-18.58%
|
185/40-15
d=20.83
w=2.91
-15.63%
|
185/45-15
d=21.56
w=3.28
-12.68%
|
185/50-15
d=22.28
w=3.64
-9.73%
|
185/55-15
d=23.01
w=4.01
-6.78%
|
185/60-15
d=23.74
w=4.37
-3.83%
|
185/65-15
d=24.47
w=4.73
-0.88%
|
185/70-15
d=25.20
w=5.10
+2.07%
|
185/75-15
d=25.93
w=5.46
+5.02%
|
185/80-15
d=26.65
w=5.83
+7.97%
|
185/85-15
d=27.38
w=6.19
+10.93%
|
| 195 |
195/25-15
d=18.84
w=1.92
-23.68%
|
195/30-15
d=19.61
w=2.30
-20.57%
|
195/35-15
d=20.37
w=2.69
-17.46%
|
195/40-15
d=21.14
w=3.07
-14.35%
|
195/45-15
d=21.91
w=3.45
-11.24%
|
195/50-15
d=22.68
w=3.84
-8.13%
|
195/55-15
d=23.44
w=4.22
-5.02%
|
195/60-15
d=24.21
w=4.61
-1.91%
|
195/65-15
d=24.98
w=4.99
+1.20%
|
195/70-15
d=25.75
w=5.37
+4.31%
|
195/75-15
d=26.52
w=5.76
+7.42%
|
195/80-15
d=27.28
w=6.14
+10.53%
|
195/85-15
d=28.05
w=6.53
+13.64%
|
| 205 |
205/25-15
d=19.04
w=2.02
-22.89%
|
205/30-15
d=19.84
w=2.42
-19.62%
|
205/35-15
d=20.65
w=2.82
-16.35%
|
205/40-15
d=21.46
w=3.23
-13.08%
|
205/45-15
d=22.26
w=3.63
-9.81%
|
205/50-15
d=23.07
w=4.04
-6.54%
|
205/55-15
d=23.88
w=4.44
-3.27%
|
205/60-15
d=24.69
w=4.84
0.00%
|
205/65-15
d=25.49
w=5.25
+3.27%
|
205/70-15
d=26.30
w=5.65
+6.54%
|
205/75-15
d=27.11
w=6.05
+9.81%
|
205/80-15
d=27.91
w=6.46
+13.08%
|
205/85-15
d=28.72
w=6.86
+16.35%
|
| 215 |
215/25-15
d=19.23
w=2.12
-22.09%
|
215/30-15
d=20.08
w=2.54
-18.66%
|
215/35-15
d=20.93
w=2.96
-15.23%
|
215/40-15
d=21.77
w=3.39
-11.80%
|
215/45-15
d=22.62
w=3.81
-8.37%
|
215/50-15
d=23.46
w=4.23
-4.94%
|
215/55-15
d=24.31
w=4.66
-1.52%
|
215/60-15
d=25.16
w=5.08
+1.91%
|
215/65-15
d=26.00
w=5.50
+5.34%
|
215/70-15
d=26.85
w=5.93
+8.77%
|
215/75-15
d=27.70
w=6.35
+12.20%
|
215/80-15
d=28.54
w=6.77
+15.63%
|
215/85-15
d=29.39
w=7.19
+19.06%
|
| 225 |
225/25-15
d=19.43
w=2.21
-21.29%
|
225/30-15
d=20.31
w=2.66
-17.70%
|
225/35-15
d=21.20
w=3.10
-14.11%
|
225/40-15
d=22.09
w=3.54
-10.53%
|
225/45-15
d=22.97
w=3.99
-6.94%
|
225/50-15
d=23.86
w=4.43
-3.35%
|
225/55-15
d=24.74
w=4.87
+0.24%
|
225/60-15
d=25.63
w=5.31
+3.83%
|
225/65-15
d=26.52
w=5.76
+7.42%
|
225/70-15
d=27.40
w=6.20
+11.00%
|
225/75-15
d=28.29
w=6.64
+14.59%
|
225/80-15
d=29.17
w=7.09
+18.18%
|
225/85-15
d=30.06
w=7.53
+21.77%
|
| 235 |
235/25-15
d=19.63
w=2.31
-20.49%
|
235/30-15
d=20.55
w=2.78
-16.75%
|
235/35-15
d=21.48
w=3.24
-13.00%
|
235/40-15
d=22.40
w=3.70
-9.25%
|
235/45-15
d=23.33
w=4.16
-5.50%
|
235/50-15
d=24.25
w=4.63
-1.75%
|
235/55-15
d=25.18
w=5.09
+1.99%
|
235/60-15
d=26.10
w=5.55
+5.74%
|
235/65-15
d=27.03
w=6.01
+9.49%
|
235/70-15
d=27.95
w=6.48
+13.24%
|
235/75-15
d=28.88
w=6.94
+16.99%
|
235/80-15
d=29.80
w=7.40
+20.73%
|
235/85-15
d=30.73
w=7.86
+24.48%
|
| 245 |
245/25-15
d=19.82
w=2.41
-19.70%
|
245/30-15
d=20.79
w=2.89
-15.79%
|
245/35-15
d=21.75
w=3.38
-11.88%
|
245/40-15
d=22.72
w=3.86
-7.97%
|
245/45-15
d=23.68
w=4.34
-4.07%
|
245/50-15
d=24.65
w=4.82
-0.16%
|
245/55-15
d=25.61
w=5.31
+3.75%
|
245/60-15
d=26.57
w=5.79
+7.66%
|
245/65-15
d=27.54
w=6.27
+11.56%
|
245/70-15
d=28.50
w=6.75
+15.47%
|
245/75-15
d=29.47
w=7.23
+19.38%
|
245/80-15
d=30.43
w=7.72
+23.29%
|
245/85-15
d=31.40
w=8.20
+27.19%
|
| 255 |
255/25-15
d=20.02
w=2.51
-18.90%
|
255/30-15
d=21.02
w=3.01
-14.83%
|
255/35-15
d=22.03
w=3.51
-10.77%
|
255/40-15
d=23.03
w=4.02
-6.70%
|
255/45-15
d=24.04
w=4.52
-2.63%
|
255/50-15
d=25.04
w=5.02
+1.44%
|
255/55-15
d=26.04
w=5.52
+5.50%
|
255/60-15
d=27.05
w=6.02
+9.57%
|
255/65-15
d=28.05
w=6.53
+13.64%
|
255/70-15
d=29.06
w=7.03
+17.70%
|
255/75-15
d=30.06
w=7.53
+21.77%
|
255/80-15
d=31.06
w=8.03
+25.84%
|
255/85-15
d=32.07
w=8.53
+29.90%
|
| 265 |
265/25-15
d=20.22
w=2.61
-18.10%
|
265/30-15
d=21.26
w=3.13
-13.88%
|
265/35-15
d=22.30
w=3.65
-9.65%
|
265/40-15
d=23.35
w=4.17
-5.42%
|
265/45-15
d=24.39
w=4.69
-1.20%
|
265/50-15
d=25.43
w=5.22
+3.03%
|
265/55-15
d=26.48
w=5.74
+7.26%
|
265/60-15
d=27.52
w=6.26
+11.48%
|
265/65-15
d=28.56
w=6.78
+15.71%
|
265/70-15
d=29.61
w=7.30
+19.94%
|
265/75-15
d=30.65
w=7.82
+24.16%
|
265/80-15
d=31.69
w=8.35
+28.39%
|
265/85-15
d=32.74
w=8.87
+32.62%
|
| 275 |
275/25-15
d=20.41
w=2.71
-17.30%
|
275/30-15
d=21.50
w=3.25
-12.92%
|
275/35-15
d=22.58
w=3.79
-8.53%
|
275/40-15
d=23.66
w=4.33
-4.15%
|
275/45-15
d=24.74
w=4.87
+0.24%
|
275/50-15
d=25.83
w=5.41
+4.63%
|
275/55-15
d=26.91
w=5.95
+9.01%
|
275/60-15
d=27.99
w=6.50
+13.40%
|
275/65-15
d=29.07
w=7.04
+17.78%
|
275/70-15
d=30.16
w=7.58
+22.17%
|
275/75-15
d=31.24
w=8.12
+26.56%
|
275/80-15
d=32.32
w=8.66
+30.94%
|
275/85-15
d=33.41
w=9.20
+35.33%
|
| 285 |
285/25-15
d=20.61
w=2.81
-16.51%
|
285/30-15
d=21.73
w=3.37
-11.96%
|
285/35-15
d=22.85
w=3.93
-7.42%
|
285/40-15
d=23.98
w=4.49
-2.87%
|
285/45-15
d=25.10
w=5.05
+1.67%
|
285/50-15
d=26.22
w=5.61
+6.22%
|
285/55-15
d=27.34
w=6.17
+10.77%
|
285/60-15
d=28.46
w=6.73
+15.31%
|
285/65-15
d=29.59
w=7.29
+19.86%
|
285/70-15
d=30.71
w=7.85
+24.40%
|
285/75-15
d=31.83
w=8.42
+28.95%
|
285/80-15
d=32.95
w=8.98
+33.49%
|
285/85-15
d=34.07
w=9.54
+38.04%
|
| 295 |
295/25-15
d=20.81
w=2.90
-15.71%
|
295/30-15
d=21.97
w=3.48
-11.00%
|
295/35-15
d=23.13
w=4.06
-6.30%
|
295/40-15
d=24.29
w=4.65
-1.59%
|
295/45-15
d=25.45
w=5.23
+3.11%
|
295/50-15
d=26.61
w=5.81
+7.81%
|
295/55-15
d=27.78
w=6.39
+12.52%
|
295/60-15
d=28.94
w=6.97
+17.22%
|
295/65-15
d=30.10
w=7.55
+21.93%
|
295/70-15
d=31.26
w=8.13
+26.63%
|
295/75-15
d=32.42
w=8.71
+31.34%
|
295/80-15
d=33.58
w=9.29
+36.04%
|
295/85-15
d=34.74
w=9.87
+40.75%
|
| 305 |
305/25-15
d=21.00
w=3.00
-14.91%
|
305/30-15
d=22.20
w=3.60
-10.05%
|
305/35-15
d=23.41
w=4.20
-5.18%
|
305/40-15
d=24.61
w=4.80
-0.32%
|
305/45-15
d=25.81
w=5.40
+4.55%
|
305/50-15
d=27.01
w=6.00
+9.41%
|
305/55-15
d=28.21
w=6.60
+14.27%
|
305/60-15
d=29.41
w=7.20
+19.14%
|
305/65-15
d=30.61
w=7.81
+24.00%
|
305/70-15
d=31.81
w=8.41
+28.87%
|
305/75-15
d=33.01
w=9.01
+33.73%
|
305/80-15
d=34.21
w=9.61
+38.60%
|
305/85-15
d=35.41
w=10.21
+43.46%
|
| 315 |
315/25-15
d=21.20
w=3.10
-14.11%
|
315/30-15
d=22.44
w=3.72
-9.09%
|
315/35-15
d=23.68
w=4.34
-4.07%
|
315/40-15
d=24.92
w=4.96
+0.96%
|
315/45-15
d=26.16
w=5.58
+5.98%
|
315/50-15
d=27.40
w=6.20
+11.00%
|
315/55-15
d=28.64
w=6.82
+16.03%
|
315/60-15
d=29.88
w=7.44
+21.05%
|
315/65-15
d=31.12
w=8.06
+26.08%
|
315/70-15
d=32.36
w=8.68
+31.10%
|
315/75-15
d=33.60
w=9.30
+36.12%
|
315/80-15
d=34.84
w=9.92
+41.15%
|
315/85-15
d=36.08
w=10.54
+46.17%
|
| 325 |
325/25-15
d=21.40
w=3.20
-13.32%
|
325/30-15
d=22.68
w=3.84
-8.13%
|
325/35-15
d=23.96
w=4.48
-2.95%
|
325/40-15
d=25.24
w=5.12
+2.23%
|
325/45-15
d=26.52
w=5.76
+7.42%
|
325/50-15
d=27.80
w=6.40
+12.60%
|
325/55-15
d=29.07
w=7.04
+17.78%
|
325/60-15
d=30.35
w=7.68
+22.97%
|
325/65-15
d=31.63
w=8.32
+28.15%
|
325/70-15
d=32.91
w=8.96
+33.33%
|
325/75-15
d=34.19
w=9.60
+38.52%
|
325/80-15
d=35.47
w=10.24
+43.70%
|
325/85-15
d=36.75
w=10.88
+48.88%
|
| 335 |
335/25-15
d=21.59
w=3.30
-12.52%
|
335/30-15
d=22.91
w=3.96
-7.18%
|
335/35-15
d=24.23
w=4.62
-1.83%
|
335/40-15
d=25.55
w=5.28
+3.51%
|
335/45-15
d=26.87
w=5.94
+8.85%
|
335/50-15
d=28.19
w=6.59
+14.19%
|
335/55-15
d=29.51
w=7.25
+19.54%
|
335/60-15
d=30.83
w=7.91
+24.88%
|
335/65-15
d=32.15
w=8.57
+30.22%
|
335/70-15
d=33.46
w=9.23
+35.57%
|
335/75-15
d=34.78
w=9.89
+40.91%
|
335/80-15
d=36.10
w=10.55
+46.25%
|
335/85-15
d=37.42
w=11.21
+51.59%
|
|
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!