Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 185/65-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 23.47 (596.1) | -1.87 (-47.5) -7.4% |
| Width inches (mm) | 7.09 (180) | 7.28 (185) | 0.2 (5) 2.8% |
| Circum. inches (mm) | 79.6 (2021.93) | 73.73 (1872.7) | -5.88 (-149.23) -7.4% |
| Sidewall Height inches (mm) | 5.67 (144) | 4.73 (120.25) | -0.94 (-23.75) -16.5% |
| Revolutions per mile (km) | 795.94 (494.58) | 859.37 (533.99) | 63.42 (39.41) 8% |
185/65-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.52 mph (29.81 km/h) |
| 25 mph (40.23 km/h) | 23.15 mph (37.26 km/h) |
| 30 mph (48.28 km/h) | 27.79 mph (44.72 km/h) |
| 35 mph (56.33 km/h) | 32.42 mph (52.17 km/h) |
| 40 mph (64.37 km/h) | 37.05 mph (59.62 km/h) |
| 45 mph (72.42 km/h) | 41.68 mph (67.08 km/h) |
| 50 mph (80.47 km/h) | 46.31 mph (74.53 km/h) |
| 55 mph (88.51 km/h) | 50.94 mph (81.98 km/h) |
| 60 mph (96.56 km/h) | 55.57 mph (89.43 km/h) |
| 65 mph (104.61 km/h) | 60.2 mph (96.89 km/h) |
| 70 mph (112.65 km/h) | 64.83 mph (104.34 km/h) |
| 75 mph (120.7 km/h) | 69.46 mph (111.79 km/h) |
| 80 mph (128.75 km/h) | 74.1 mph (119.25 km/h) |
| 85 mph (136.79 km/h) | 78.73 mph (126.7 km/h) |
| 90 mph (144.84 km/h) | 83.36 mph (134.15 km/h) |
| 95 mph (152.89 km/h) | 87.99 mph (141.6 km/h) |
| 100 mph (160.93 km/h) | 92.62 mph (149.06 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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