| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 185/60-15 | 0.00 % | 50.00 | 1,000.00 | 23.74 | 4.37 | 111.00 |
| 315/35-15 | -0.25 % | 49.88 | 1,002.49 | 23.68 | 4.34 | 110.25 |
| 245/45-15 | -0.25 % | 49.88 | 1,002.49 | 23.68 | 4.34 | 110.25 |
| 275/40-15 | -0.33 % | 49.83 | 1,003.32 | 23.66 | 4.33 | 110.00 |
| 225/50-15 | +0.50 % | 50.25 | 995.02 | 23.86 | 4.43 | 112.50 |
| 205/55-15 | +0.58 % | 50.29 | 994.20 | 23.88 | 4.44 | 112.75 |
| 145/75-15 | -0.75 % | 49.63 | 1,007.46 | 23.56 | 4.28 | 108.75 |
| 155/70-15 | -0.83 % | 49.59 | 1,008.29 | 23.54 | 4.27 | 108.50 |
| 325/35-15 | +0.91 % | 50.46 | 990.88 | 23.96 | 4.48 | 113.75 |
| 175/65-15 | +0.91 % | 50.46 | 990.88 | 23.96 | 4.48 | 113.75 |
| 285/40-15 | +1.00 % | 50.50 | 990.05 | 23.98 | 4.49 | 114.00 |
| 215/50-15 | -1.16 % | 49.42 | 1,011.61 | 23.46 | 4.23 | 107.50 |
| 255/45-15 | +1.24 % | 50.62 | 987.56 | 24.04 | 4.52 | 114.75 |
| 195/55-15 | -1.24 % | 49.38 | 1,012.44 | 23.44 | 4.22 | 107.25 |
| 165/65-15 | -1.24 % | 49.38 | 1,012.44 | 23.44 | 4.22 | 107.25 |
| 305/35-15 | -1.41 % | 49.30 | 1,014.10 | 23.41 | 4.20 | 106.75 |
| 165/70-15 | +1.49 % | 50.75 | 985.07 | 24.09 | 4.55 | 115.50 |
| 145/80-15 | +1.66 % | 50.83 | 983.42 | 24.13 | 4.57 | 116.00 |
| 265/40-15 | -1.66 % | 49.17 | 1,016.58 | 23.35 | 4.17 | 106.00 |
| 155/75-15 | +1.74 % | 50.87 | 982.59 | 24.15 | 4.58 | 116.25 |
| 235/45-15 | -1.74 % | 49.13 | 1,017.41 | 23.33 | 4.16 | 105.75 |
| 175/60-15 | -1.99 % | 49.00 | 1,019.90 | 23.27 | 4.13 | 105.00 |
| 195/60-15 | +1.99 % | 51.00 | 980.10 | 24.21 | 4.61 | 117.00 |
| 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
-24.79%
|
145/30-15
d=18.43
w=1.71
-22.39%
|
145/35-15
d=19.00
w=2.00
-19.98%
|
145/40-15
d=19.57
w=2.28
-17.58%
|
145/45-15
d=20.14
w=2.57
-15.17%
|
145/50-15
d=20.71
w=2.85
-12.77%
|
145/55-15
d=21.28
w=3.14
-10.36%
|
145/60-15
d=21.85
w=3.43
-7.96%
|
145/65-15
d=22.42
w=3.71
-5.56%
|
145/70-15
d=22.99
w=4.00
-3.15%
|
145/75-15
d=23.56
w=4.28
-0.75%
|
145/80-15
d=24.13
w=4.57
+1.66%
|
145/85-15
d=24.70
w=4.85
+4.06%
|
| 155 |
155/25-15
d=18.05
w=1.53
-23.96%
|
155/30-15
d=18.66
w=1.83
-21.39%
|
155/35-15
d=19.27
w=2.14
-18.82%
|
155/40-15
d=19.88
w=2.44
-16.25%
|
155/45-15
d=20.49
w=2.75
-13.68%
|
155/50-15
d=21.10
w=3.05
-11.11%
|
155/55-15
d=21.71
w=3.36
-8.54%
|
155/60-15
d=22.32
w=3.66
-5.97%
|
155/65-15
d=22.93
w=3.97
-3.40%
|
155/70-15
d=23.54
w=4.27
-0.83%
|
155/75-15
d=24.15
w=4.58
+1.74%
|
155/80-15
d=24.76
w=4.88
+4.31%
|
155/85-15
d=25.37
w=5.19
+6.88%
|
| 165 |
165/25-15
d=18.25
w=1.62
-23.13%
|
165/30-15
d=18.90
w=1.95
-20.40%
|
165/35-15
d=19.55
w=2.27
-17.66%
|
165/40-15
d=20.20
w=2.60
-14.93%
|
165/45-15
d=20.85
w=2.92
-12.19%
|
165/50-15
d=21.50
w=3.25
-9.45%
|
165/55-15
d=22.15
w=3.57
-6.72%
|
165/60-15
d=22.80
w=3.90
-3.98%
|
165/65-15
d=23.44
w=4.22
-1.24%
|
165/70-15
d=24.09
w=4.55
+1.49%
|
165/75-15
d=24.74
w=4.87
+4.23%
|
165/80-15
d=25.39
w=5.20
+6.97%
|
165/85-15
d=26.04
w=5.52
+9.70%
|
| 175 |
175/25-15
d=18.44
w=1.72
-22.31%
|
175/30-15
d=19.13
w=2.07
-19.40%
|
175/35-15
d=19.82
w=2.41
-16.50%
|
175/40-15
d=20.51
w=2.76
-13.60%
|
175/45-15
d=21.20
w=3.10
-10.70%
|
175/50-15
d=21.89
w=3.44
-7.79%
|
175/55-15
d=22.58
w=3.79
-4.89%
|
175/60-15
d=23.27
w=4.13
-1.99%
|
175/65-15
d=23.96
w=4.48
+0.91%
|
175/70-15
d=24.65
w=4.82
+3.81%
|
175/75-15
d=25.33
w=5.17
+6.72%
|
175/80-15
d=26.02
w=5.51
+9.62%
|
175/85-15
d=26.71
w=5.86
+12.52%
|
| 185 |
185/25-15
d=18.64
w=1.82
-21.48%
|
185/30-15
d=19.37
w=2.19
-18.41%
|
185/35-15
d=20.10
w=2.55
-15.34%
|
185/40-15
d=20.83
w=2.91
-12.27%
|
185/45-15
d=21.56
w=3.28
-9.20%
|
185/50-15
d=22.28
w=3.64
-6.14%
|
185/55-15
d=23.01
w=4.01
-3.07%
|
185/60-15
d=23.74
w=4.37
0.00%
|
185/65-15
d=24.47
w=4.73
+3.07%
|
185/70-15
d=25.20
w=5.10
+6.14%
|
185/75-15
d=25.93
w=5.46
+9.20%
|
185/80-15
d=26.65
w=5.83
+12.27%
|
185/85-15
d=27.38
w=6.19
+15.34%
|
| 195 |
195/25-15
d=18.84
w=1.92
-20.65%
|
195/30-15
d=19.61
w=2.30
-17.41%
|
195/35-15
d=20.37
w=2.69
-14.18%
|
195/40-15
d=21.14
w=3.07
-10.95%
|
195/45-15
d=21.91
w=3.45
-7.71%
|
195/50-15
d=22.68
w=3.84
-4.48%
|
195/55-15
d=23.44
w=4.22
-1.24%
|
195/60-15
d=24.21
w=4.61
+1.99%
|
195/65-15
d=24.98
w=4.99
+5.22%
|
195/70-15
d=25.75
w=5.37
+8.46%
|
195/75-15
d=26.52
w=5.76
+11.69%
|
195/80-15
d=27.28
w=6.14
+14.93%
|
195/85-15
d=28.05
w=6.53
+18.16%
|
| 205 |
205/25-15
d=19.04
w=2.02
-19.82%
|
205/30-15
d=19.84
w=2.42
-16.42%
|
205/35-15
d=20.65
w=2.82
-13.02%
|
205/40-15
d=21.46
w=3.23
-9.62%
|
205/45-15
d=22.26
w=3.63
-6.22%
|
205/50-15
d=23.07
w=4.04
-2.82%
|
205/55-15
d=23.88
w=4.44
+0.58%
|
205/60-15
d=24.69
w=4.84
+3.98%
|
205/65-15
d=25.49
w=5.25
+7.38%
|
205/70-15
d=26.30
w=5.65
+10.78%
|
205/75-15
d=27.11
w=6.05
+14.18%
|
205/80-15
d=27.91
w=6.46
+17.58%
|
205/85-15
d=28.72
w=6.86
+20.98%
|
| 215 |
215/25-15
d=19.23
w=2.12
-18.99%
|
215/30-15
d=20.08
w=2.54
-15.42%
|
215/35-15
d=20.93
w=2.96
-11.86%
|
215/40-15
d=21.77
w=3.39
-8.29%
|
215/45-15
d=22.62
w=3.81
-4.73%
|
215/50-15
d=23.46
w=4.23
-1.16%
|
215/55-15
d=24.31
w=4.66
+2.40%
|
215/60-15
d=25.16
w=5.08
+5.97%
|
215/65-15
d=26.00
w=5.50
+9.54%
|
215/70-15
d=26.85
w=5.93
+13.10%
|
215/75-15
d=27.70
w=6.35
+16.67%
|
215/80-15
d=28.54
w=6.77
+20.23%
|
215/85-15
d=29.39
w=7.19
+23.80%
|
| 225 |
225/25-15
d=19.43
w=2.21
-18.16%
|
225/30-15
d=20.31
w=2.66
-14.43%
|
225/35-15
d=21.20
w=3.10
-10.70%
|
225/40-15
d=22.09
w=3.54
-6.97%
|
225/45-15
d=22.97
w=3.99
-3.23%
|
225/50-15
d=23.86
w=4.43
+0.50%
|
225/55-15
d=24.74
w=4.87
+4.23%
|
225/60-15
d=25.63
w=5.31
+7.96%
|
225/65-15
d=26.52
w=5.76
+11.69%
|
225/70-15
d=27.40
w=6.20
+15.42%
|
225/75-15
d=28.29
w=6.64
+19.15%
|
225/80-15
d=29.17
w=7.09
+22.89%
|
225/85-15
d=30.06
w=7.53
+26.62%
|
| 235 |
235/25-15
d=19.63
w=2.31
-17.33%
|
235/30-15
d=20.55
w=2.78
-13.43%
|
235/35-15
d=21.48
w=3.24
-9.54%
|
235/40-15
d=22.40
w=3.70
-5.64%
|
235/45-15
d=23.33
w=4.16
-1.74%
|
235/50-15
d=24.25
w=4.63
+2.16%
|
235/55-15
d=25.18
w=5.09
+6.05%
|
235/60-15
d=26.10
w=5.55
+9.95%
|
235/65-15
d=27.03
w=6.01
+13.85%
|
235/70-15
d=27.95
w=6.48
+17.74%
|
235/75-15
d=28.88
w=6.94
+21.64%
|
235/80-15
d=29.80
w=7.40
+25.54%
|
235/85-15
d=30.73
w=7.86
+29.44%
|
| 245 |
245/25-15
d=19.82
w=2.41
-16.50%
|
245/30-15
d=20.79
w=2.89
-12.44%
|
245/35-15
d=21.75
w=3.38
-8.37%
|
245/40-15
d=22.72
w=3.86
-4.31%
|
245/45-15
d=23.68
w=4.34
-0.25%
|
245/50-15
d=24.65
w=4.82
+3.81%
|
245/55-15
d=25.61
w=5.31
+7.88%
|
245/60-15
d=26.57
w=5.79
+11.94%
|
245/65-15
d=27.54
w=6.27
+16.00%
|
245/70-15
d=28.50
w=6.75
+20.07%
|
245/75-15
d=29.47
w=7.23
+24.13%
|
245/80-15
d=30.43
w=7.72
+28.19%
|
245/85-15
d=31.40
w=8.20
+32.26%
|
| 255 |
255/25-15
d=20.02
w=2.51
-15.67%
|
255/30-15
d=21.02
w=3.01
-11.44%
|
255/35-15
d=22.03
w=3.51
-7.21%
|
255/40-15
d=23.03
w=4.02
-2.99%
|
255/45-15
d=24.04
w=4.52
+1.24%
|
255/50-15
d=25.04
w=5.02
+5.47%
|
255/55-15
d=26.04
w=5.52
+9.70%
|
255/60-15
d=27.05
w=6.02
+13.93%
|
255/65-15
d=28.05
w=6.53
+18.16%
|
255/70-15
d=29.06
w=7.03
+22.39%
|
255/75-15
d=30.06
w=7.53
+26.62%
|
255/80-15
d=31.06
w=8.03
+30.85%
|
255/85-15
d=32.07
w=8.53
+35.07%
|
| 265 |
265/25-15
d=20.22
w=2.61
-14.84%
|
265/30-15
d=21.26
w=3.13
-10.45%
|
265/35-15
d=22.30
w=3.65
-6.05%
|
265/40-15
d=23.35
w=4.17
-1.66%
|
265/45-15
d=24.39
w=4.69
+2.74%
|
265/50-15
d=25.43
w=5.22
+7.13%
|
265/55-15
d=26.48
w=5.74
+11.53%
|
265/60-15
d=27.52
w=6.26
+15.92%
|
265/65-15
d=28.56
w=6.78
+20.32%
|
265/70-15
d=29.61
w=7.30
+24.71%
|
265/75-15
d=30.65
w=7.82
+29.10%
|
265/80-15
d=31.69
w=8.35
+33.50%
|
265/85-15
d=32.74
w=8.87
+37.89%
|
| 275 |
275/25-15
d=20.41
w=2.71
-14.01%
|
275/30-15
d=21.50
w=3.25
-9.45%
|
275/35-15
d=22.58
w=3.79
-4.89%
|
275/40-15
d=23.66
w=4.33
-0.33%
|
275/45-15
d=24.74
w=4.87
+4.23%
|
275/50-15
d=25.83
w=5.41
+8.79%
|
275/55-15
d=26.91
w=5.95
+13.35%
|
275/60-15
d=27.99
w=6.50
+17.91%
|
275/65-15
d=29.07
w=7.04
+22.47%
|
275/70-15
d=30.16
w=7.58
+27.03%
|
275/75-15
d=31.24
w=8.12
+31.59%
|
275/80-15
d=32.32
w=8.66
+36.15%
|
275/85-15
d=33.41
w=9.20
+40.71%
|
| 285 |
285/25-15
d=20.61
w=2.81
-13.18%
|
285/30-15
d=21.73
w=3.37
-8.46%
|
285/35-15
d=22.85
w=3.93
-3.73%
|
285/40-15
d=23.98
w=4.49
+1.00%
|
285/45-15
d=25.10
w=5.05
+5.72%
|
285/50-15
d=26.22
w=5.61
+10.45%
|
285/55-15
d=27.34
w=6.17
+15.17%
|
285/60-15
d=28.46
w=6.73
+19.90%
|
285/65-15
d=29.59
w=7.29
+24.63%
|
285/70-15
d=30.71
w=7.85
+29.35%
|
285/75-15
d=31.83
w=8.42
+34.08%
|
285/80-15
d=32.95
w=8.98
+38.81%
|
285/85-15
d=34.07
w=9.54
+43.53%
|
| 295 |
295/25-15
d=20.81
w=2.90
-12.35%
|
295/30-15
d=21.97
w=3.48
-7.46%
|
295/35-15
d=23.13
w=4.06
-2.57%
|
295/40-15
d=24.29
w=4.65
+2.32%
|
295/45-15
d=25.45
w=5.23
+7.21%
|
295/50-15
d=26.61
w=5.81
+12.11%
|
295/55-15
d=27.78
w=6.39
+17.00%
|
295/60-15
d=28.94
w=6.97
+21.89%
|
295/65-15
d=30.10
w=7.55
+26.78%
|
295/70-15
d=31.26
w=8.13
+31.67%
|
295/75-15
d=32.42
w=8.71
+36.57%
|
295/80-15
d=33.58
w=9.29
+41.46%
|
295/85-15
d=34.74
w=9.87
+46.35%
|
| 305 |
305/25-15
d=21.00
w=3.00
-11.53%
|
305/30-15
d=22.20
w=3.60
-6.47%
|
305/35-15
d=23.41
w=4.20
-1.41%
|
305/40-15
d=24.61
w=4.80
+3.65%
|
305/45-15
d=25.81
w=5.40
+8.71%
|
305/50-15
d=27.01
w=6.00
+13.76%
|
305/55-15
d=28.21
w=6.60
+18.82%
|
305/60-15
d=29.41
w=7.20
+23.88%
|
305/65-15
d=30.61
w=7.81
+28.94%
|
305/70-15
d=31.81
w=8.41
+34.00%
|
305/75-15
d=33.01
w=9.01
+39.05%
|
305/80-15
d=34.21
w=9.61
+44.11%
|
305/85-15
d=35.41
w=10.21
+49.17%
|
| 315 |
315/25-15
d=21.20
w=3.10
-10.70%
|
315/30-15
d=22.44
w=3.72
-5.47%
|
315/35-15
d=23.68
w=4.34
-0.25%
|
315/40-15
d=24.92
w=4.96
+4.98%
|
315/45-15
d=26.16
w=5.58
+10.20%
|
315/50-15
d=27.40
w=6.20
+15.42%
|
315/55-15
d=28.64
w=6.82
+20.65%
|
315/60-15
d=29.88
w=7.44
+25.87%
|
315/65-15
d=31.12
w=8.06
+31.09%
|
315/70-15
d=32.36
w=8.68
+36.32%
|
315/75-15
d=33.60
w=9.30
+41.54%
|
315/80-15
d=34.84
w=9.92
+46.77%
|
315/85-15
d=36.08
w=10.54
+51.99%
|
| 325 |
325/25-15
d=21.40
w=3.20
-9.87%
|
325/30-15
d=22.68
w=3.84
-4.48%
|
325/35-15
d=23.96
w=4.48
+0.91%
|
325/40-15
d=25.24
w=5.12
+6.30%
|
325/45-15
d=26.52
w=5.76
+11.69%
|
325/50-15
d=27.80
w=6.40
+17.08%
|
325/55-15
d=29.07
w=7.04
+22.47%
|
325/60-15
d=30.35
w=7.68
+27.86%
|
325/65-15
d=31.63
w=8.32
+33.25%
|
325/70-15
d=32.91
w=8.96
+38.64%
|
325/75-15
d=34.19
w=9.60
+44.03%
|
325/80-15
d=35.47
w=10.24
+49.42%
|
325/85-15
d=36.75
w=10.88
+54.81%
|
| 335 |
335/25-15
d=21.59
w=3.30
-9.04%
|
335/30-15
d=22.91
w=3.96
-3.48%
|
335/35-15
d=24.23
w=4.62
+2.07%
|
335/40-15
d=25.55
w=5.28
+7.63%
|
335/45-15
d=26.87
w=5.94
+13.18%
|
335/50-15
d=28.19
w=6.59
+18.74%
|
335/55-15
d=29.51
w=7.25
+24.30%
|
335/60-15
d=30.83
w=7.91
+29.85%
|
335/65-15
d=32.15
w=8.57
+35.41%
|
335/70-15
d=33.46
w=9.23
+40.96%
|
335/75-15
d=34.78
w=9.89
+46.52%
|
335/80-15
d=36.10
w=10.55
+52.07%
|
335/85-15
d=37.42
w=11.21
+57.63%
|
|
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!