Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-18 | 290/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.13 (689.2) | 31.7 (805.2) | 4.57 (116) 16.8% |
| Width inches (mm) | 5.71 (145) | 11.42 (290) | 5.71 (145) 100% |
| Circum. inches (mm) | 85.24 (2165.19) | 99.59 (2529.61) | 14.35 (364.42) 16.8% |
| Sidewall Height inches (mm) | 4.57 (116) | 6.85 (174) | 2.28 (58) 50% |
| Revolutions per mile (km) | 743.28 (461.85) | 636.2 (395.32) | -107.08 (-66.54) -14.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.37 mph (37.6 km/h) |
| 25 mph (40.23 km/h) | 29.21 mph (47.01 km/h) |
| 30 mph (48.28 km/h) | 35.05 mph (56.41 km/h) |
| 35 mph (56.33 km/h) | 40.89 mph (65.81 km/h) |
| 40 mph (64.37 km/h) | 46.73 mph (75.21 km/h) |
| 45 mph (72.42 km/h) | 52.57 mph (84.61 km/h) |
| 50 mph (80.47 km/h) | 58.42 mph (94.01 km/h) |
| 55 mph (88.51 km/h) | 64.26 mph (103.41 km/h) |
| 60 mph (96.56 km/h) | 70.1 mph (112.81 km/h) |
| 65 mph (104.61 km/h) | 75.94 mph (122.21 km/h) |
| 70 mph (112.65 km/h) | 81.78 mph (131.62 km/h) |
| 75 mph (120.7 km/h) | 87.62 mph (141.02 km/h) |
| 80 mph (128.75 km/h) | 93.46 mph (150.42 km/h) |
| 85 mph (136.79 km/h) | 99.31 mph (159.82 km/h) |
| 90 mph (144.84 km/h) | 105.15 mph (169.22 km/h) |
| 95 mph (152.89 km/h) | 110.99 mph (178.62 km/h) |
| 100 mph (160.93 km/h) | 116.83 mph (188.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1619 | 1881 | 2025 | 2115 | 2212 | 2280 | 2356 | 2446 | 2570 | 2694 | 2832 | 2942 | 3142 | 3362 | 3534 | 3645 | 3707 | 3934 | 4251 | 4940 |
Better Fuel Economy Factory Ratios Increased Power
