Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 185/65-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 23.47 (596.1) | 1.91 (48.6) 8.9% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 67.72 (1720.02) | 73.73 (1872.7) | 6.01 (152.68) 8.9% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 4.73 (120.25) | 1.46 (37) 44.4% |
| Revolutions per mile (km) | 935.65 (581.39) | 859.37 (533.99) | -76.28 (-47.4) -8.2% |
185/65-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.78 mph (35.04 km/h) |
| 25 mph (40.23 km/h) | 27.22 mph (43.81 km/h) |
| 30 mph (48.28 km/h) | 32.66 mph (52.57 km/h) |
| 35 mph (56.33 km/h) | 38.11 mph (61.33 km/h) |
| 40 mph (64.37 km/h) | 43.55 mph (70.09 km/h) |
| 45 mph (72.42 km/h) | 48.99 mph (78.85 km/h) |
| 50 mph (80.47 km/h) | 54.44 mph (87.61 km/h) |
| 55 mph (88.51 km/h) | 59.88 mph (96.37 km/h) |
| 60 mph (96.56 km/h) | 65.33 mph (105.13 km/h) |
| 65 mph (104.61 km/h) | 70.77 mph (113.89 km/h) |
| 70 mph (112.65 km/h) | 76.21 mph (122.65 km/h) |
| 75 mph (120.7 km/h) | 81.66 mph (131.42 km/h) |
| 80 mph (128.75 km/h) | 87.1 mph (140.18 km/h) |
| 85 mph (136.79 km/h) | 92.55 mph (148.94 km/h) |
| 90 mph (144.84 km/h) | 97.99 mph (157.7 km/h) |
| 95 mph (152.89 km/h) | 103.43 mph (166.46 km/h) |
| 100 mph (160.93 km/h) | 108.88 mph (175.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2187 | 2541 | 2736 | 2857 | 2987 | 3080 | 3183 | 3304 | 3471 | 3639 | 3825 | 3974 | 4244 | 4541 | 4774 | 4923 | 5007 | 5314 | 5742 | 6672 |
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