Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/80-13 | 185/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.02 (610.2) | 23.2 (589.2) | -0.83 (-21) -3.4% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 75.47 (1917) | 72.88 (1851.03) | -2.6 (-65.97) -3.4% |
| Sidewall Height inches (mm) | 5.51 (140) | 5.1 (129.5) | -0.41 (-10.5) -7.5% |
| Revolutions per mile (km) | 839.51 (521.65) | 869.43 (540.24) | 29.92 (18.59) 3.6% |
185/70-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.31 mph (31.08 km/h) |
| 25 mph (40.23 km/h) | 24.14 mph (38.85 km/h) |
| 30 mph (48.28 km/h) | 28.97 mph (46.62 km/h) |
| 35 mph (56.33 km/h) | 33.8 mph (54.39 km/h) |
| 40 mph (64.37 km/h) | 38.62 mph (62.16 km/h) |
| 45 mph (72.42 km/h) | 43.45 mph (69.93 km/h) |
| 50 mph (80.47 km/h) | 48.28 mph (77.7 km/h) |
| 55 mph (88.51 km/h) | 53.11 mph (85.47 km/h) |
| 60 mph (96.56 km/h) | 57.94 mph (93.24 km/h) |
| 65 mph (104.61 km/h) | 62.76 mph (101.01 km/h) |
| 70 mph (112.65 km/h) | 67.59 mph (108.78 km/h) |
| 75 mph (120.7 km/h) | 72.42 mph (116.55 km/h) |
| 80 mph (128.75 km/h) | 77.25 mph (124.32 km/h) |
| 85 mph (136.79 km/h) | 82.07 mph (132.09 km/h) |
| 90 mph (144.84 km/h) | 86.9 mph (139.86 km/h) |
| 95 mph (152.89 km/h) | 91.73 mph (147.63 km/h) |
| 100 mph (160.93 km/h) | 96.56 mph (155.4 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2213 | 2570 | 2768 | 2890 | 3022 | 3116 | 3220 | 3342 | 3512 | 3681 | 3870 | 4020 | 4293 | 4595 | 4830 | 4981 | 5065 | 5376 | 5809 | 6751 |
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