Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 300/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 36.9 (937.2) | 8.98 (228) 32.1% |
| Width inches (mm) | 7.09 (180) | 11.81 (300) | 4.72 (120) 66.7% |
| Circum. inches (mm) | 87.72 (2228.02) | 115.92 (2944.3) | 28.2 (716.28) 32.1% |
| Sidewall Height inches (mm) | 4.96 (126) | 9.45 (240) | 4.49 (114) 90.5% |
| Revolutions per mile (km) | 722.32 (448.83) | 546.6 (339.64) | -175.72 (-109.19) -24.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.43 mph (42.53 km/h) |
| 25 mph (40.23 km/h) | 33.04 mph (53.17 km/h) |
| 30 mph (48.28 km/h) | 39.64 mph (63.8 km/h) |
| 35 mph (56.33 km/h) | 46.25 mph (74.44 km/h) |
| 40 mph (64.37 km/h) | 52.86 mph (85.07 km/h) |
| 45 mph (72.42 km/h) | 59.47 mph (95.7 km/h) |
| 50 mph (80.47 km/h) | 66.07 mph (106.34 km/h) |
| 55 mph (88.51 km/h) | 72.68 mph (116.97 km/h) |
| 60 mph (96.56 km/h) | 79.29 mph (127.6 km/h) |
| 65 mph (104.61 km/h) | 85.9 mph (138.24 km/h) |
| 70 mph (112.65 km/h) | 92.5 mph (148.87 km/h) |
| 75 mph (120.7 km/h) | 99.11 mph (159.51 km/h) |
| 80 mph (128.75 km/h) | 105.72 mph (170.14 km/h) |
| 85 mph (136.79 km/h) | 112.33 mph (180.77 km/h) |
| 90 mph (144.84 km/h) | 118.93 mph (191.41 km/h) |
| 95 mph (152.89 km/h) | 125.54 mph (202.04 km/h) |
| 100 mph (160.93 km/h) | 132.15 mph (212.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1391 | 1616 | 1740 | 1817 | 1900 | 1959 | 2024 | 2101 | 2208 | 2314 | 2433 | 2527 | 2699 | 2889 | 3036 | 3131 | 3184 | 3380 | 3652 | 4244 |
Better Fuel Economy Factory Ratios Increased Power
