| Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
|---|---|---|---|---|---|---|
| 195/80-15 | 0.00 % | 50.00 | 1,000.00 | 27.28 | 6.14 | 156.00 |
| 285/55-15 | +0.22 % | 50.11 | 997.84 | 27.34 | 6.17 | 156.75 |
| 185/85-15 | +0.36 % | 50.18 | 996.39 | 27.38 | 6.19 | 157.25 |
| 315/50-15 | +0.43 % | 50.22 | 995.67 | 27.40 | 6.20 | 157.50 |
| 225/70-15 | +0.43 % | 50.22 | 995.67 | 27.40 | 6.20 | 157.50 |
| 205/75-15 | -0.65 % | 49.68 | 1,006.49 | 27.11 | 6.05 | 153.75 |
| 255/60-15 | -0.87 % | 49.57 | 1,008.66 | 27.05 | 6.02 | 153.00 |
| 265/60-15 | +0.87 % | 50.43 | 991.34 | 27.52 | 6.26 | 159.00 |
| 245/65-15 | +0.94 % | 50.47 | 990.62 | 27.54 | 6.27 | 159.25 |
| 235/65-15 | -0.94 % | 49.53 | 1,009.38 | 27.03 | 6.01 | 152.75 |
| 305/50-15 | -1.01 % | 49.49 | 1,010.10 | 27.01 | 6.00 | 152.50 |
| 275/55-15 | -1.37 % | 49.31 | 1,013.71 | 26.91 | 5.95 | 151.25 |
| 335/45-15 | -1.52 % | 49.24 | 1,015.15 | 26.87 | 5.94 | 150.75 |
| 215/75-15 | +1.52 % | 50.76 | 984.85 | 27.70 | 6.35 | 161.25 |
| 215/70-15 | -1.59 % | 49.21 | 1,015.87 | 26.85 | 5.93 | 150.50 |
| 295/55-15 | +1.80 % | 50.90 | 981.96 | 27.78 | 6.39 | 162.25 |
| 325/50-15 | +1.88 % | 50.94 | 981.24 | 27.80 | 6.40 | 162.50 |
| 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
-34.56%
|
145/30-15
d=18.43
w=1.71
-32.47%
|
145/35-15
d=19.00
w=2.00
-30.38%
|
145/40-15
d=19.57
w=2.28
-28.28%
|
145/45-15
d=20.14
w=2.57
-26.19%
|
145/50-15
d=20.71
w=2.85
-24.10%
|
145/55-15
d=21.28
w=3.14
-22.01%
|
145/60-15
d=21.85
w=3.43
-19.91%
|
145/65-15
d=22.42
w=3.71
-17.82%
|
145/70-15
d=22.99
w=4.00
-15.73%
|
145/75-15
d=23.56
w=4.28
-13.64%
|
145/80-15
d=24.13
w=4.57
-11.54%
|
145/85-15
d=24.70
w=4.85
-9.45%
|
| 155 |
155/25-15
d=18.05
w=1.53
-33.84%
|
155/30-15
d=18.66
w=1.83
-31.60%
|
155/35-15
d=19.27
w=2.14
-29.37%
|
155/40-15
d=19.88
w=2.44
-27.13%
|
155/45-15
d=20.49
w=2.75
-24.89%
|
155/50-15
d=21.10
w=3.05
-22.66%
|
155/55-15
d=21.71
w=3.36
-20.42%
|
155/60-15
d=22.32
w=3.66
-18.18%
|
155/65-15
d=22.93
w=3.97
-15.95%
|
155/70-15
d=23.54
w=4.27
-13.71%
|
155/75-15
d=24.15
w=4.58
-11.47%
|
155/80-15
d=24.76
w=4.88
-9.24%
|
155/85-15
d=25.37
w=5.19
-7.00%
|
| 165 |
165/25-15
d=18.25
w=1.62
-33.12%
|
165/30-15
d=18.90
w=1.95
-30.74%
|
165/35-15
d=19.55
w=2.27
-28.35%
|
165/40-15
d=20.20
w=2.60
-25.97%
|
165/45-15
d=20.85
w=2.92
-23.59%
|
165/50-15
d=21.50
w=3.25
-21.21%
|
165/55-15
d=22.15
w=3.57
-18.83%
|
165/60-15
d=22.80
w=3.90
-16.45%
|
165/65-15
d=23.44
w=4.22
-14.07%
|
165/70-15
d=24.09
w=4.55
-11.69%
|
165/75-15
d=24.74
w=4.87
-9.31%
|
165/80-15
d=25.39
w=5.20
-6.93%
|
165/85-15
d=26.04
w=5.52
-4.55%
|
| 175 |
175/25-15
d=18.44
w=1.72
-32.40%
|
175/30-15
d=19.13
w=2.07
-29.87%
|
175/35-15
d=19.82
w=2.41
-27.34%
|
175/40-15
d=20.51
w=2.76
-24.82%
|
175/45-15
d=21.20
w=3.10
-22.29%
|
175/50-15
d=21.89
w=3.44
-19.77%
|
175/55-15
d=22.58
w=3.79
-17.24%
|
175/60-15
d=23.27
w=4.13
-14.72%
|
175/65-15
d=23.96
w=4.48
-12.19%
|
175/70-15
d=24.65
w=4.82
-9.67%
|
175/75-15
d=25.33
w=5.17
-7.14%
|
175/80-15
d=26.02
w=5.51
-4.62%
|
175/85-15
d=26.71
w=5.86
-2.09%
|
| 185 |
185/25-15
d=18.64
w=1.82
-31.67%
|
185/30-15
d=19.37
w=2.19
-29.00%
|
185/35-15
d=20.10
w=2.55
-26.33%
|
185/40-15
d=20.83
w=2.91
-23.67%
|
185/45-15
d=21.56
w=3.28
-21.00%
|
185/50-15
d=22.28
w=3.64
-18.33%
|
185/55-15
d=23.01
w=4.01
-15.66%
|
185/60-15
d=23.74
w=4.37
-12.99%
|
185/65-15
d=24.47
w=4.73
-10.32%
|
185/70-15
d=25.20
w=5.10
-7.65%
|
185/75-15
d=25.93
w=5.46
-4.98%
|
185/80-15
d=26.65
w=5.83
-2.31%
|
185/85-15
d=27.38
w=6.19
+0.36%
|
| 195 |
195/25-15
d=18.84
w=1.92
-30.95%
|
195/30-15
d=19.61
w=2.30
-28.14%
|
195/35-15
d=20.37
w=2.69
-25.32%
|
195/40-15
d=21.14
w=3.07
-22.51%
|
195/45-15
d=21.91
w=3.45
-19.70%
|
195/50-15
d=22.68
w=3.84
-16.88%
|
195/55-15
d=23.44
w=4.22
-14.07%
|
195/60-15
d=24.21
w=4.61
-11.26%
|
195/65-15
d=24.98
w=4.99
-8.44%
|
195/70-15
d=25.75
w=5.37
-5.63%
|
195/75-15
d=26.52
w=5.76
-2.81%
|
195/80-15
d=27.28
w=6.14
0.00%
|
195/85-15
d=28.05
w=6.53
+2.81%
|
| 205 |
205/25-15
d=19.04
w=2.02
-30.23%
|
205/30-15
d=19.84
w=2.42
-27.27%
|
205/35-15
d=20.65
w=2.82
-24.31%
|
205/40-15
d=21.46
w=3.23
-21.36%
|
205/45-15
d=22.26
w=3.63
-18.40%
|
205/50-15
d=23.07
w=4.04
-15.44%
|
205/55-15
d=23.88
w=4.44
-12.48%
|
205/60-15
d=24.69
w=4.84
-9.52%
|
205/65-15
d=25.49
w=5.25
-6.57%
|
205/70-15
d=26.30
w=5.65
-3.61%
|
205/75-15
d=27.11
w=6.05
-0.65%
|
205/80-15
d=27.91
w=6.46
+2.31%
|
205/85-15
d=28.72
w=6.86
+5.27%
|
| 215 |
215/25-15
d=19.23
w=2.12
-29.51%
|
215/30-15
d=20.08
w=2.54
-26.41%
|
215/35-15
d=20.93
w=2.96
-23.30%
|
215/40-15
d=21.77
w=3.39
-20.20%
|
215/45-15
d=22.62
w=3.81
-17.10%
|
215/50-15
d=23.46
w=4.23
-14.00%
|
215/55-15
d=24.31
w=4.66
-10.89%
|
215/60-15
d=25.16
w=5.08
-7.79%
|
215/65-15
d=26.00
w=5.50
-4.69%
|
215/70-15
d=26.85
w=5.93
-1.59%
|
215/75-15
d=27.70
w=6.35
+1.52%
|
215/80-15
d=28.54
w=6.77
+4.62%
|
215/85-15
d=29.39
w=7.19
+7.72%
|
| 225 |
225/25-15
d=19.43
w=2.21
-28.79%
|
225/30-15
d=20.31
w=2.66
-25.54%
|
225/35-15
d=21.20
w=3.10
-22.29%
|
225/40-15
d=22.09
w=3.54
-19.05%
|
225/45-15
d=22.97
w=3.99
-15.80%
|
225/50-15
d=23.86
w=4.43
-12.55%
|
225/55-15
d=24.74
w=4.87
-9.31%
|
225/60-15
d=25.63
w=5.31
-6.06%
|
225/65-15
d=26.52
w=5.76
-2.81%
|
225/70-15
d=27.40
w=6.20
+0.43%
|
225/75-15
d=28.29
w=6.64
+3.68%
|
225/80-15
d=29.17
w=7.09
+6.93%
|
225/85-15
d=30.06
w=7.53
+10.17%
|
| 235 |
235/25-15
d=19.63
w=2.31
-28.07%
|
235/30-15
d=20.55
w=2.78
-24.68%
|
235/35-15
d=21.48
w=3.24
-21.28%
|
235/40-15
d=22.40
w=3.70
-17.89%
|
235/45-15
d=23.33
w=4.16
-14.50%
|
235/50-15
d=24.25
w=4.63
-11.11%
|
235/55-15
d=25.18
w=5.09
-7.72%
|
235/60-15
d=26.10
w=5.55
-4.33%
|
235/65-15
d=27.03
w=6.01
-0.94%
|
235/70-15
d=27.95
w=6.48
+2.45%
|
235/75-15
d=28.88
w=6.94
+5.84%
|
235/80-15
d=29.80
w=7.40
+9.24%
|
235/85-15
d=30.73
w=7.86
+12.63%
|
| 245 |
245/25-15
d=19.82
w=2.41
-27.34%
|
245/30-15
d=20.79
w=2.89
-23.81%
|
245/35-15
d=21.75
w=3.38
-20.27%
|
245/40-15
d=22.72
w=3.86
-16.74%
|
245/45-15
d=23.68
w=4.34
-13.20%
|
245/50-15
d=24.65
w=4.82
-9.67%
|
245/55-15
d=25.61
w=5.31
-6.13%
|
245/60-15
d=26.57
w=5.79
-2.60%
|
245/65-15
d=27.54
w=6.27
+0.94%
|
245/70-15
d=28.50
w=6.75
+4.47%
|
245/75-15
d=29.47
w=7.23
+8.01%
|
245/80-15
d=30.43
w=7.72
+11.54%
|
245/85-15
d=31.40
w=8.20
+15.08%
|
| 255 |
255/25-15
d=20.02
w=2.51
-26.62%
|
255/30-15
d=21.02
w=3.01
-22.94%
|
255/35-15
d=22.03
w=3.51
-19.26%
|
255/40-15
d=23.03
w=4.02
-15.58%
|
255/45-15
d=24.04
w=4.52
-11.90%
|
255/50-15
d=25.04
w=5.02
-8.23%
|
255/55-15
d=26.04
w=5.52
-4.55%
|
255/60-15
d=27.05
w=6.02
-0.87%
|
255/65-15
d=28.05
w=6.53
+2.81%
|
255/70-15
d=29.06
w=7.03
+6.49%
|
255/75-15
d=30.06
w=7.53
+10.17%
|
255/80-15
d=31.06
w=8.03
+13.85%
|
255/85-15
d=32.07
w=8.53
+17.53%
|
| 265 |
265/25-15
d=20.22
w=2.61
-25.90%
|
265/30-15
d=21.26
w=3.13
-22.08%
|
265/35-15
d=22.30
w=3.65
-18.25%
|
265/40-15
d=23.35
w=4.17
-14.43%
|
265/45-15
d=24.39
w=4.69
-10.61%
|
265/50-15
d=25.43
w=5.22
-6.78%
|
265/55-15
d=26.48
w=5.74
-2.96%
|
265/60-15
d=27.52
w=6.26
+0.87%
|
265/65-15
d=28.56
w=6.78
+4.69%
|
265/70-15
d=29.61
w=7.30
+8.51%
|
265/75-15
d=30.65
w=7.82
+12.34%
|
265/80-15
d=31.69
w=8.35
+16.16%
|
265/85-15
d=32.74
w=8.87
+19.99%
|
| 275 |
275/25-15
d=20.41
w=2.71
-25.18%
|
275/30-15
d=21.50
w=3.25
-21.21%
|
275/35-15
d=22.58
w=3.79
-17.24%
|
275/40-15
d=23.66
w=4.33
-13.28%
|
275/45-15
d=24.74
w=4.87
-9.31%
|
275/50-15
d=25.83
w=5.41
-5.34%
|
275/55-15
d=26.91
w=5.95
-1.37%
|
275/60-15
d=27.99
w=6.50
+2.60%
|
275/65-15
d=29.07
w=7.04
+6.57%
|
275/70-15
d=30.16
w=7.58
+10.53%
|
275/75-15
d=31.24
w=8.12
+14.50%
|
275/80-15
d=32.32
w=8.66
+18.47%
|
275/85-15
d=33.41
w=9.20
+22.44%
|
| 285 |
285/25-15
d=20.61
w=2.81
-24.46%
|
285/30-15
d=21.73
w=3.37
-20.35%
|
285/35-15
d=22.85
w=3.93
-16.23%
|
285/40-15
d=23.98
w=4.49
-12.12%
|
285/45-15
d=25.10
w=5.05
-8.01%
|
285/50-15
d=26.22
w=5.61
-3.90%
|
285/55-15
d=27.34
w=6.17
+0.22%
|
285/60-15
d=28.46
w=6.73
+4.33%
|
285/65-15
d=29.59
w=7.29
+8.44%
|
285/70-15
d=30.71
w=7.85
+12.55%
|
285/75-15
d=31.83
w=8.42
+16.67%
|
285/80-15
d=32.95
w=8.98
+20.78%
|
285/85-15
d=34.07
w=9.54
+24.89%
|
| 295 |
295/25-15
d=20.81
w=2.90
-23.74%
|
295/30-15
d=21.97
w=3.48
-19.48%
|
295/35-15
d=23.13
w=4.06
-15.22%
|
295/40-15
d=24.29
w=4.65
-10.97%
|
295/45-15
d=25.45
w=5.23
-6.71%
|
295/50-15
d=26.61
w=5.81
-2.45%
|
295/55-15
d=27.78
w=6.39
+1.80%
|
295/60-15
d=28.94
w=6.97
+6.06%
|
295/65-15
d=30.10
w=7.55
+10.32%
|
295/70-15
d=31.26
w=8.13
+14.57%
|
295/75-15
d=32.42
w=8.71
+18.83%
|
295/80-15
d=33.58
w=9.29
+23.09%
|
295/85-15
d=34.74
w=9.87
+27.34%
|
| 305 |
305/25-15
d=21.00
w=3.00
-23.02%
|
305/30-15
d=22.20
w=3.60
-18.61%
|
305/35-15
d=23.41
w=4.20
-14.21%
|
305/40-15
d=24.61
w=4.80
-9.81%
|
305/45-15
d=25.81
w=5.40
-5.41%
|
305/50-15
d=27.01
w=6.00
-1.01%
|
305/55-15
d=28.21
w=6.60
+3.39%
|
305/60-15
d=29.41
w=7.20
+7.79%
|
305/65-15
d=30.61
w=7.81
+12.19%
|
305/70-15
d=31.81
w=8.41
+16.59%
|
305/75-15
d=33.01
w=9.01
+21.00%
|
305/80-15
d=34.21
w=9.61
+25.40%
|
305/85-15
d=35.41
w=10.21
+29.80%
|
| 315 |
315/25-15
d=21.20
w=3.10
-22.29%
|
315/30-15
d=22.44
w=3.72
-17.75%
|
315/35-15
d=23.68
w=4.34
-13.20%
|
315/40-15
d=24.92
w=4.96
-8.66%
|
315/45-15
d=26.16
w=5.58
-4.11%
|
315/50-15
d=27.40
w=6.20
+0.43%
|
315/55-15
d=28.64
w=6.82
+4.98%
|
315/60-15
d=29.88
w=7.44
+9.52%
|
315/65-15
d=31.12
w=8.06
+14.07%
|
315/70-15
d=32.36
w=8.68
+18.61%
|
315/75-15
d=33.60
w=9.30
+23.16%
|
315/80-15
d=34.84
w=9.92
+27.71%
|
315/85-15
d=36.08
w=10.54
+32.25%
|
| 325 |
325/25-15
d=21.40
w=3.20
-21.57%
|
325/30-15
d=22.68
w=3.84
-16.88%
|
325/35-15
d=23.96
w=4.48
-12.19%
|
325/40-15
d=25.24
w=5.12
-7.50%
|
325/45-15
d=26.52
w=5.76
-2.81%
|
325/50-15
d=27.80
w=6.40
+1.88%
|
325/55-15
d=29.07
w=7.04
+6.57%
|
325/60-15
d=30.35
w=7.68
+11.26%
|
325/65-15
d=31.63
w=8.32
+15.95%
|
325/70-15
d=32.91
w=8.96
+20.63%
|
325/75-15
d=34.19
w=9.60
+25.32%
|
325/80-15
d=35.47
w=10.24
+30.01%
|
325/85-15
d=36.75
w=10.88
+34.70%
|
| 335 |
335/25-15
d=21.59
w=3.30
-20.85%
|
335/30-15
d=22.91
w=3.96
-16.02%
|
335/35-15
d=24.23
w=4.62
-11.18%
|
335/40-15
d=25.55
w=5.28
-6.35%
|
335/45-15
d=26.87
w=5.94
-1.52%
|
335/50-15
d=28.19
w=6.59
+3.32%
|
335/55-15
d=29.51
w=7.25
+8.15%
|
335/60-15
d=30.83
w=7.91
+12.99%
|
335/65-15
d=32.15
w=8.57
+17.82%
|
335/70-15
d=33.46
w=9.23
+22.66%
|
335/75-15
d=34.78
w=9.89
+27.49%
|
335/80-15
d=36.10
w=10.55
+32.32%
|
335/85-15
d=37.42
w=11.21
+37.16%
|
|
Wheel Size 16
|
|||||||||||||
|
Wheel Size 16.5
|
|||||||||||||
|
Wheel Size 17
|
|||||||||||||
|
Wheel Size 18
|
|||||||||||||
|
Wheel Size 19
|
|||||||||||||
|
Wheel Size 20
|
|||||||||||||
|
Wheel Size 21
|
|||||||||||||
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!