Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 180/70-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 25.92 (658.4) | -2 (-50.8) -7.2% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 87.72 (2228.02) | 81.43 (2068.42) | -6.28 (-159.59) -7.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.96 (126) | 0 (0) 0% |
| Revolutions per mile (km) | 722.32 (448.83) | 778.05 (483.46) | 55.73 (34.63) 7.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.57 mph (29.88 km/h) |
| 25 mph (40.23 km/h) | 23.21 mph (37.35 km/h) |
| 30 mph (48.28 km/h) | 27.85 mph (44.82 km/h) |
| 35 mph (56.33 km/h) | 32.49 mph (52.29 km/h) |
| 40 mph (64.37 km/h) | 37.13 mph (59.76 km/h) |
| 45 mph (72.42 km/h) | 41.78 mph (67.23 km/h) |
| 50 mph (80.47 km/h) | 46.42 mph (74.7 km/h) |
| 55 mph (88.51 km/h) | 51.06 mph (82.17 km/h) |
| 60 mph (96.56 km/h) | 55.7 mph (89.64 km/h) |
| 65 mph (104.61 km/h) | 60.34 mph (97.11 km/h) |
| 70 mph (112.65 km/h) | 64.99 mph (104.58 km/h) |
| 75 mph (120.7 km/h) | 69.63 mph (112.06 km/h) |
| 80 mph (128.75 km/h) | 74.27 mph (119.53 km/h) |
| 85 mph (136.79 km/h) | 78.91 mph (127 km/h) |
| 90 mph (144.84 km/h) | 83.55 mph (134.47 km/h) |
| 95 mph (152.89 km/h) | 88.2 mph (141.94 km/h) |
| 100 mph (160.93 km/h) | 92.84 mph (149.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | 2300 | 2477 | 2587 | 2705 | 2789 | 2882 | 2991 | 3143 | 3294 | 3463 | 3598 | 3842 | 4112 | 4322 | 4457 | 4533 | 4811 | 5199 | 6041 |
Better Fuel Economy Factory Ratios Increased Power
