Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-18 | 250/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.13 (689.2) | 33.75 (857.2) | 6.61 (168) 24.4% |
| Width inches (mm) | 5.71 (145) | 9.84 (250) | 4.13 (105) 72.4% |
| Circum. inches (mm) | 85.24 (2165.19) | 106.02 (2692.97) | 20.78 (527.79) 24.4% |
| Sidewall Height inches (mm) | 4.57 (116) | 7.87 (200) | 3.31 (84) 72.4% |
| Revolutions per mile (km) | 743.28 (461.85) | 597.61 (371.34) | -145.67 (-90.52) -19.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.88 mph (40.03 km/h) |
| 25 mph (40.23 km/h) | 31.09 mph (50.04 km/h) |
| 30 mph (48.28 km/h) | 37.31 mph (60.05 km/h) |
| 35 mph (56.33 km/h) | 43.53 mph (70.06 km/h) |
| 40 mph (64.37 km/h) | 49.75 mph (80.07 km/h) |
| 45 mph (72.42 km/h) | 55.97 mph (90.07 km/h) |
| 50 mph (80.47 km/h) | 62.19 mph (100.08 km/h) |
| 55 mph (88.51 km/h) | 68.41 mph (110.09 km/h) |
| 60 mph (96.56 km/h) | 74.63 mph (120.1 km/h) |
| 65 mph (104.61 km/h) | 80.84 mph (130.11 km/h) |
| 70 mph (112.65 km/h) | 87.06 mph (140.12 km/h) |
| 75 mph (120.7 km/h) | 93.28 mph (150.12 km/h) |
| 80 mph (128.75 km/h) | 99.5 mph (160.13 km/h) |
| 85 mph (136.79 km/h) | 105.72 mph (170.14 km/h) |
| 90 mph (144.84 km/h) | 111.94 mph (180.15 km/h) |
| 95 mph (152.89 km/h) | 118.16 mph (190.16 km/h) |
| 100 mph (160.93 km/h) | 124.38 mph (200.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1521 | 1767 | 1903 | 1987 | 2077 | 2142 | 2213 | 2297 | 2414 | 2530 | 2660 | 2763 | 2951 | 3158 | 3320 | 3423 | 3482 | 3695 | 3993 | 4640 |
Better Fuel Economy Factory Ratios Increased Power
