Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 180/70-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 23.92 (607.6) | -1 (-25.4) -4% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 78.29 (1988.63) | 75.15 (1908.83) | -3.14 (-79.8) -4% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.96 (126) | 0 (0) 0% |
| Revolutions per mile (km) | 809.27 (502.86) | 843.1 (523.88) | 33.83 (21.02) 4.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.2 mph (30.9 km/h) |
| 25 mph (40.23 km/h) | 24 mph (38.62 km/h) |
| 30 mph (48.28 km/h) | 28.8 mph (46.34 km/h) |
| 35 mph (56.33 km/h) | 33.6 mph (54.07 km/h) |
| 40 mph (64.37 km/h) | 38.39 mph (61.79 km/h) |
| 45 mph (72.42 km/h) | 43.19 mph (69.51 km/h) |
| 50 mph (80.47 km/h) | 47.99 mph (77.24 km/h) |
| 55 mph (88.51 km/h) | 52.79 mph (84.96 km/h) |
| 60 mph (96.56 km/h) | 57.59 mph (92.69 km/h) |
| 65 mph (104.61 km/h) | 62.39 mph (100.41 km/h) |
| 70 mph (112.65 km/h) | 67.19 mph (108.13 km/h) |
| 75 mph (120.7 km/h) | 71.99 mph (115.86 km/h) |
| 80 mph (128.75 km/h) | 76.79 mph (123.58 km/h) |
| 85 mph (136.79 km/h) | 81.59 mph (131.31 km/h) |
| 90 mph (144.84 km/h) | 86.39 mph (139.03 km/h) |
| 95 mph (152.89 km/h) | 91.19 mph (146.75 km/h) |
| 100 mph (160.93 km/h) | 95.99 mph (154.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2146 | 2492 | 2684 | 2803 | 2931 | 3022 | 3122 | 3241 | 3405 | 3570 | 3752 | 3898 | 4163 | 4455 | 4684 | 4830 | 4912 | 5213 | 5633 | 6546 |
Better Fuel Economy Factory Ratios Increased Power
