| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 185/55-15 | 0.00 % | 50.00 | 1,000.00 | 23.01 | 4.01 | 101.75 |
| 255/40-15 | +0.09 % | 50.04 | 999.14 | 23.03 | 4.02 | 102.00 |
| 145/70-15 | -0.09 % | 49.96 | 1,000.86 | 22.99 | 4.00 | 101.50 |
| 225/45-15 | -0.17 % | 49.91 | 1,001.71 | 22.97 | 3.99 | 101.25 |
| 205/50-15 | +0.26 % | 50.13 | 997.43 | 23.07 | 4.04 | 102.50 |
| 155/65-15 | -0.34 % | 49.83 | 1,003.42 | 22.93 | 3.97 | 100.75 |
| 335/30-15 | -0.43 % | 49.79 | 1,004.28 | 22.91 | 3.96 | 100.50 |
| 295/35-15 | +0.51 % | 50.26 | 994.87 | 23.13 | 4.06 | 103.25 |
| 285/35-15 | -0.68 % | 49.66 | 1,006.84 | 22.85 | 3.93 | 99.75 |
| 165/60-15 | -0.94 % | 49.53 | 1,009.41 | 22.80 | 3.90 | 99.00 |
| 175/60-15 | +1.11 % | 50.56 | 988.88 | 23.27 | 4.13 | 105.00 |
| 245/40-15 | -1.28 % | 49.36 | 1,012.83 | 22.72 | 3.86 | 98.00 |
| 235/45-15 | +1.37 % | 50.68 | 986.31 | 23.33 | 4.16 | 105.75 |
| 325/30-15 | -1.45 % | 49.27 | 1,014.54 | 22.68 | 3.84 | 97.50 |
| 265/40-15 | +1.45 % | 50.73 | 985.46 | 23.35 | 4.17 | 106.00 |
| 195/50-15 | -1.45 % | 49.27 | 1,014.54 | 22.68 | 3.84 | 97.50 |
| 305/35-15 | +1.71 % | 50.86 | 982.89 | 23.41 | 4.20 | 106.75 |
| 215/45-15 | -1.71 % | 49.14 | 1,017.11 | 22.62 | 3.81 | 96.75 |
| 195/55-15 | +1.88 % | 50.94 | 981.18 | 23.44 | 4.22 | 107.25 |
| 165/65-15 | +1.88 % | 50.94 | 981.18 | 23.44 | 4.22 | 107.25 |
| 275/35-15 | -1.88 % | 49.06 | 1,018.82 | 22.58 | 3.79 | 96.25 |
| 175/55-15 | -1.88 % | 49.06 | 1,018.82 | 22.58 | 3.79 | 96.25 |
| 215/50-15 | +1.97 % | 50.98 | 980.33 | 23.46 | 4.23 | 107.50 |
| 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
-22.41%
|
145/30-15
d=18.43
w=1.71
-19.93%
|
145/35-15
d=19.00
w=2.00
-17.45%
|
145/40-15
d=19.57
w=2.28
-14.97%
|
145/45-15
d=20.14
w=2.57
-12.49%
|
145/50-15
d=20.71
w=2.85
-10.01%
|
145/55-15
d=21.28
w=3.14
-7.53%
|
145/60-15
d=21.85
w=3.43
-5.05%
|
145/65-15
d=22.42
w=3.71
-2.57%
|
145/70-15
d=22.99
w=4.00
-0.09%
|
145/75-15
d=23.56
w=4.28
+2.40%
|
145/80-15
d=24.13
w=4.57
+4.88%
|
145/85-15
d=24.70
w=4.85
+7.36%
|
| 155 |
155/25-15
d=18.05
w=1.53
-21.56%
|
155/30-15
d=18.66
w=1.83
-18.91%
|
155/35-15
d=19.27
w=2.14
-16.25%
|
155/40-15
d=19.88
w=2.44
-13.60%
|
155/45-15
d=20.49
w=2.75
-10.95%
|
155/50-15
d=21.10
w=3.05
-8.30%
|
155/55-15
d=21.71
w=3.36
-5.65%
|
155/60-15
d=22.32
w=3.66
-2.99%
|
155/65-15
d=22.93
w=3.97
-0.34%
|
155/70-15
d=23.54
w=4.27
+2.31%
|
155/75-15
d=24.15
w=4.58
+4.96%
|
155/80-15
d=24.76
w=4.88
+7.61%
|
155/85-15
d=25.37
w=5.19
+10.27%
|
| 165 |
165/25-15
d=18.25
w=1.62
-20.70%
|
165/30-15
d=18.90
w=1.95
-17.88%
|
165/35-15
d=19.55
w=2.27
-15.06%
|
165/40-15
d=20.20
w=2.60
-12.23%
|
165/45-15
d=20.85
w=2.92
-9.41%
|
165/50-15
d=21.50
w=3.25
-6.59%
|
165/55-15
d=22.15
w=3.57
-3.76%
|
165/60-15
d=22.80
w=3.90
-0.94%
|
165/65-15
d=23.44
w=4.22
+1.88%
|
165/70-15
d=24.09
w=4.55
+4.70%
|
165/75-15
d=24.74
w=4.87
+7.53%
|
165/80-15
d=25.39
w=5.20
+10.35%
|
165/85-15
d=26.04
w=5.52
+13.17%
|
| 175 |
175/25-15
d=18.44
w=1.72
-19.85%
|
175/30-15
d=19.13
w=2.07
-16.85%
|
175/35-15
d=19.82
w=2.41
-13.86%
|
175/40-15
d=20.51
w=2.76
-10.86%
|
175/45-15
d=21.20
w=3.10
-7.87%
|
175/50-15
d=21.89
w=3.44
-4.88%
|
175/55-15
d=22.58
w=3.79
-1.88%
|
175/60-15
d=23.27
w=4.13
+1.11%
|
175/65-15
d=23.96
w=4.48
+4.11%
|
175/70-15
d=24.65
w=4.82
+7.10%
|
175/75-15
d=25.33
w=5.17
+10.09%
|
175/80-15
d=26.02
w=5.51
+13.09%
|
175/85-15
d=26.71
w=5.86
+16.08%
|
| 185 |
185/25-15
d=18.64
w=1.82
-18.99%
|
185/30-15
d=19.37
w=2.19
-15.83%
|
185/35-15
d=20.10
w=2.55
-12.66%
|
185/40-15
d=20.83
w=2.91
-9.50%
|
185/45-15
d=21.56
w=3.28
-6.33%
|
185/50-15
d=22.28
w=3.64
-3.17%
|
185/55-15
d=23.01
w=4.01
0.00%
|
185/60-15
d=23.74
w=4.37
+3.17%
|
185/65-15
d=24.47
w=4.73
+6.33%
|
185/70-15
d=25.20
w=5.10
+9.50%
|
185/75-15
d=25.93
w=5.46
+12.66%
|
185/80-15
d=26.65
w=5.83
+15.83%
|
185/85-15
d=27.38
w=6.19
+18.99%
|
| 195 |
195/25-15
d=18.84
w=1.92
-18.14%
|
195/30-15
d=19.61
w=2.30
-14.80%
|
195/35-15
d=20.37
w=2.69
-11.46%
|
195/40-15
d=21.14
w=3.07
-8.13%
|
195/45-15
d=21.91
w=3.45
-4.79%
|
195/50-15
d=22.68
w=3.84
-1.45%
|
195/55-15
d=23.44
w=4.22
+1.88%
|
195/60-15
d=24.21
w=4.61
+5.22%
|
195/65-15
d=24.98
w=4.99
+8.55%
|
195/70-15
d=25.75
w=5.37
+11.89%
|
195/75-15
d=26.52
w=5.76
+15.23%
|
195/80-15
d=27.28
w=6.14
+18.56%
|
195/85-15
d=28.05
w=6.53
+21.90%
|
| 205 |
205/25-15
d=19.04
w=2.02
-17.28%
|
205/30-15
d=19.84
w=2.42
-13.77%
|
205/35-15
d=20.65
w=2.82
-10.27%
|
205/40-15
d=21.46
w=3.23
-6.76%
|
205/45-15
d=22.26
w=3.63
-3.25%
|
205/50-15
d=23.07
w=4.04
+0.26%
|
205/55-15
d=23.88
w=4.44
+3.76%
|
205/60-15
d=24.69
w=4.84
+7.27%
|
205/65-15
d=25.49
w=5.25
+10.78%
|
205/70-15
d=26.30
w=5.65
+14.29%
|
205/75-15
d=27.11
w=6.05
+17.79%
|
205/80-15
d=27.91
w=6.46
+21.30%
|
205/85-15
d=28.72
w=6.86
+24.81%
|
| 215 |
215/25-15
d=19.23
w=2.12
-16.42%
|
215/30-15
d=20.08
w=2.54
-12.75%
|
215/35-15
d=20.93
w=2.96
-9.07%
|
215/40-15
d=21.77
w=3.39
-5.39%
|
215/45-15
d=22.62
w=3.81
-1.71%
|
215/50-15
d=23.46
w=4.23
+1.97%
|
215/55-15
d=24.31
w=4.66
+5.65%
|
215/60-15
d=25.16
w=5.08
+9.32%
|
215/65-15
d=26.00
w=5.50
+13.00%
|
215/70-15
d=26.85
w=5.93
+16.68%
|
215/75-15
d=27.70
w=6.35
+20.36%
|
215/80-15
d=28.54
w=6.77
+24.04%
|
215/85-15
d=29.39
w=7.19
+27.72%
|
| 225 |
225/25-15
d=19.43
w=2.21
-15.57%
|
225/30-15
d=20.31
w=2.66
-11.72%
|
225/35-15
d=21.20
w=3.10
-7.87%
|
225/40-15
d=22.09
w=3.54
-4.02%
|
225/45-15
d=22.97
w=3.99
-0.17%
|
225/50-15
d=23.86
w=4.43
+3.68%
|
225/55-15
d=24.74
w=4.87
+7.53%
|
225/60-15
d=25.63
w=5.31
+11.38%
|
225/65-15
d=26.52
w=5.76
+15.23%
|
225/70-15
d=27.40
w=6.20
+19.08%
|
225/75-15
d=28.29
w=6.64
+22.93%
|
225/80-15
d=29.17
w=7.09
+26.78%
|
225/85-15
d=30.06
w=7.53
+30.62%
|
| 235 |
235/25-15
d=19.63
w=2.31
-14.71%
|
235/30-15
d=20.55
w=2.78
-10.69%
|
235/35-15
d=21.48
w=3.24
-6.67%
|
235/40-15
d=22.40
w=3.70
-2.65%
|
235/45-15
d=23.33
w=4.16
+1.37%
|
235/50-15
d=24.25
w=4.63
+5.39%
|
235/55-15
d=25.18
w=5.09
+9.41%
|
235/60-15
d=26.10
w=5.55
+13.43%
|
235/65-15
d=27.03
w=6.01
+17.45%
|
235/70-15
d=27.95
w=6.48
+21.47%
|
235/75-15
d=28.88
w=6.94
+25.49%
|
235/80-15
d=29.80
w=7.40
+29.51%
|
235/85-15
d=30.73
w=7.86
+33.53%
|
| 245 |
245/25-15
d=19.82
w=2.41
-13.86%
|
245/30-15
d=20.79
w=2.89
-9.67%
|
245/35-15
d=21.75
w=3.38
-5.47%
|
245/40-15
d=22.72
w=3.86
-1.28%
|
245/45-15
d=23.68
w=4.34
+2.91%
|
245/50-15
d=24.65
w=4.82
+7.10%
|
245/55-15
d=25.61
w=5.31
+11.29%
|
245/60-15
d=26.57
w=5.79
+15.48%
|
245/65-15
d=27.54
w=6.27
+19.67%
|
245/70-15
d=28.50
w=6.75
+23.87%
|
245/75-15
d=29.47
w=7.23
+28.06%
|
245/80-15
d=30.43
w=7.72
+32.25%
|
245/85-15
d=31.40
w=8.20
+36.44%
|
| 255 |
255/25-15
d=20.02
w=2.51
-13.00%
|
255/30-15
d=21.02
w=3.01
-8.64%
|
255/35-15
d=22.03
w=3.51
-4.28%
|
255/40-15
d=23.03
w=4.02
+0.09%
|
255/45-15
d=24.04
w=4.52
+4.45%
|
255/50-15
d=25.04
w=5.02
+8.81%
|
255/55-15
d=26.04
w=5.52
+13.17%
|
255/60-15
d=27.05
w=6.02
+17.54%
|
255/65-15
d=28.05
w=6.53
+21.90%
|
255/70-15
d=29.06
w=7.03
+26.26%
|
255/75-15
d=30.06
w=7.53
+30.62%
|
255/80-15
d=31.06
w=8.03
+34.99%
|
255/85-15
d=32.07
w=8.53
+39.35%
|
| 265 |
265/25-15
d=20.22
w=2.61
-12.15%
|
265/30-15
d=21.26
w=3.13
-7.61%
|
265/35-15
d=22.30
w=3.65
-3.08%
|
265/40-15
d=23.35
w=4.17
+1.45%
|
265/45-15
d=24.39
w=4.69
+5.99%
|
265/50-15
d=25.43
w=5.22
+10.52%
|
265/55-15
d=26.48
w=5.74
+15.06%
|
265/60-15
d=27.52
w=6.26
+19.59%
|
265/65-15
d=28.56
w=6.78
+24.12%
|
265/70-15
d=29.61
w=7.30
+28.66%
|
265/75-15
d=30.65
w=7.82
+33.19%
|
265/80-15
d=31.69
w=8.35
+37.72%
|
265/85-15
d=32.74
w=8.87
+42.26%
|
| 275 |
275/25-15
d=20.41
w=2.71
-11.29%
|
275/30-15
d=21.50
w=3.25
-6.59%
|
275/35-15
d=22.58
w=3.79
-1.88%
|
275/40-15
d=23.66
w=4.33
+2.82%
|
275/45-15
d=24.74
w=4.87
+7.53%
|
275/50-15
d=25.83
w=5.41
+12.23%
|
275/55-15
d=26.91
w=5.95
+16.94%
|
275/60-15
d=27.99
w=6.50
+21.64%
|
275/65-15
d=29.07
w=7.04
+26.35%
|
275/70-15
d=30.16
w=7.58
+31.05%
|
275/75-15
d=31.24
w=8.12
+35.76%
|
275/80-15
d=32.32
w=8.66
+40.46%
|
275/85-15
d=33.41
w=9.20
+45.17%
|
| 285 |
285/25-15
d=20.61
w=2.81
-10.44%
|
285/30-15
d=21.73
w=3.37
-5.56%
|
285/35-15
d=22.85
w=3.93
-0.68%
|
285/40-15
d=23.98
w=4.49
+4.19%
|
285/45-15
d=25.10
w=5.05
+9.07%
|
285/50-15
d=26.22
w=5.61
+13.94%
|
285/55-15
d=27.34
w=6.17
+18.82%
|
285/60-15
d=28.46
w=6.73
+23.70%
|
285/65-15
d=29.59
w=7.29
+28.57%
|
285/70-15
d=30.71
w=7.85
+33.45%
|
285/75-15
d=31.83
w=8.42
+38.32%
|
285/80-15
d=32.95
w=8.98
+43.20%
|
285/85-15
d=34.07
w=9.54
+48.08%
|
| 295 |
295/25-15
d=20.81
w=2.90
-9.58%
|
295/30-15
d=21.97
w=3.48
-4.53%
|
295/35-15
d=23.13
w=4.06
+0.51%
|
295/40-15
d=24.29
w=4.65
+5.56%
|
295/45-15
d=25.45
w=5.23
+10.61%
|
295/50-15
d=26.61
w=5.81
+15.65%
|
295/55-15
d=27.78
w=6.39
+20.70%
|
295/60-15
d=28.94
w=6.97
+25.75%
|
295/65-15
d=30.10
w=7.55
+30.80%
|
295/70-15
d=31.26
w=8.13
+35.84%
|
295/75-15
d=32.42
w=8.71
+40.89%
|
295/80-15
d=33.58
w=9.29
+45.94%
|
295/85-15
d=34.74
w=9.87
+50.98%
|
| 305 |
305/25-15
d=21.00
w=3.00
-8.73%
|
305/30-15
d=22.20
w=3.60
-3.51%
|
305/35-15
d=23.41
w=4.20
+1.71%
|
305/40-15
d=24.61
w=4.80
+6.93%
|
305/45-15
d=25.81
w=5.40
+12.15%
|
305/50-15
d=27.01
w=6.00
+17.37%
|
305/55-15
d=28.21
w=6.60
+22.58%
|
305/60-15
d=29.41
w=7.20
+27.80%
|
305/65-15
d=30.61
w=7.81
+33.02%
|
305/70-15
d=31.81
w=8.41
+38.24%
|
305/75-15
d=33.01
w=9.01
+43.46%
|
305/80-15
d=34.21
w=9.61
+48.67%
|
305/85-15
d=35.41
w=10.21
+53.89%
|
| 315 |
315/25-15
d=21.20
w=3.10
-7.87%
|
315/30-15
d=22.44
w=3.72
-2.48%
|
315/35-15
d=23.68
w=4.34
+2.91%
|
315/40-15
d=24.92
w=4.96
+8.30%
|
315/45-15
d=26.16
w=5.58
+13.69%
|
315/50-15
d=27.40
w=6.20
+19.08%
|
315/55-15
d=28.64
w=6.82
+24.47%
|
315/60-15
d=29.88
w=7.44
+29.85%
|
315/65-15
d=31.12
w=8.06
+35.24%
|
315/70-15
d=32.36
w=8.68
+40.63%
|
315/75-15
d=33.60
w=9.30
+46.02%
|
315/80-15
d=34.84
w=9.92
+51.41%
|
315/85-15
d=36.08
w=10.54
+56.80%
|
| 325 |
325/25-15
d=21.40
w=3.20
-7.01%
|
325/30-15
d=22.68
w=3.84
-1.45%
|
325/35-15
d=23.96
w=4.48
+4.11%
|
325/40-15
d=25.24
w=5.12
+9.67%
|
325/45-15
d=26.52
w=5.76
+15.23%
|
325/50-15
d=27.80
w=6.40
+20.79%
|
325/55-15
d=29.07
w=7.04
+26.35%
|
325/60-15
d=30.35
w=7.68
+31.91%
|
325/65-15
d=31.63
w=8.32
+37.47%
|
325/70-15
d=32.91
w=8.96
+43.03%
|
325/75-15
d=34.19
w=9.60
+48.59%
|
325/80-15
d=35.47
w=10.24
+54.15%
|
325/85-15
d=36.75
w=10.88
+59.71%
|
| 335 |
335/25-15
d=21.59
w=3.30
-6.16%
|
335/30-15
d=22.91
w=3.96
-0.43%
|
335/35-15
d=24.23
w=4.62
+5.30%
|
335/40-15
d=25.55
w=5.28
+11.04%
|
335/45-15
d=26.87
w=5.94
+16.77%
|
335/50-15
d=28.19
w=6.59
+22.50%
|
335/55-15
d=29.51
w=7.25
+28.23%
|
335/60-15
d=30.83
w=7.91
+33.96%
|
335/65-15
d=32.15
w=8.57
+39.69%
|
335/70-15
d=33.46
w=9.23
+45.42%
|
335/75-15
d=34.78
w=9.89
+51.15%
|
335/80-15
d=36.10
w=10.55
+56.89%
|
335/85-15
d=37.42
w=11.21
+62.62%
|
|
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!