Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-18 | 225/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.13 (689.2) | 28.63 (727.2) | 1.5 (38) 5.5% |
| Width inches (mm) | 5.71 (145) | 8.86 (225) | 3.15 (80) 55.2% |
| Circum. inches (mm) | 85.24 (2165.19) | 89.94 (2284.57) | 4.7 (119.38) 5.5% |
| Sidewall Height inches (mm) | 4.57 (116) | 5.31 (135) | 0.75 (19) 16.4% |
| Revolutions per mile (km) | 743.28 (461.85) | 704.44 (437.72) | -38.84 (-24.13) -5.2% |
225/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.96 km/h) |
| 25 mph (40.23 km/h) | 26.38 mph (42.45 km/h) |
| 30 mph (48.28 km/h) | 31.65 mph (50.94 km/h) |
| 35 mph (56.33 km/h) | 36.93 mph (59.43 km/h) |
| 40 mph (64.37 km/h) | 42.21 mph (67.92 km/h) |
| 45 mph (72.42 km/h) | 47.48 mph (76.41 km/h) |
| 50 mph (80.47 km/h) | 52.76 mph (84.9 km/h) |
| 55 mph (88.51 km/h) | 58.03 mph (93.39 km/h) |
| 60 mph (96.56 km/h) | 63.31 mph (101.88 km/h) |
| 65 mph (104.61 km/h) | 68.58 mph (110.38 km/h) |
| 70 mph (112.65 km/h) | 73.86 mph (118.87 km/h) |
| 75 mph (120.7 km/h) | 79.14 mph (127.36 km/h) |
| 80 mph (128.75 km/h) | 84.41 mph (135.85 km/h) |
| 85 mph (136.79 km/h) | 89.69 mph (144.34 km/h) |
| 90 mph (144.84 km/h) | 94.96 mph (152.83 km/h) |
| 95 mph (152.89 km/h) | 100.24 mph (161.32 km/h) |
| 100 mph (160.93 km/h) | 105.51 mph (169.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1793 | 2083 | 2243 | 2342 | 2449 | 2525 | 2609 | 2708 | 2845 | 2983 | 3135 | 3257 | 3479 | 3723 | 3913 | 4035 | 4104 | 4356 | 4707 | 5470 |
Better Fuel Economy Factory Ratios Increased Power
