Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 225/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 28.63 (727.2) | -0.05 (-1.3) -0.2% |
| Width inches (mm) | 9.65 (245) | 8.86 (225) | -0.79 (-20) -8.2% |
| Circum. inches (mm) | 90.1 (2288.65) | 89.94 (2284.57) | -0.16 (-4.08) -0.2% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.31 (135) | 0.97 (24.75) 22.4% |
| Revolutions per mile (km) | 703.18 (436.94) | 704.44 (437.72) | 1.26 (0.78) 0.2% |
225/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.96 mph (32.13 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.16 km/h) |
| 30 mph (48.28 km/h) | 29.95 mph (48.19 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.23 km/h) |
| 40 mph (64.37 km/h) | 39.93 mph (64.26 km/h) |
| 45 mph (72.42 km/h) | 44.92 mph (72.29 km/h) |
| 50 mph (80.47 km/h) | 49.91 mph (80.32 km/h) |
| 55 mph (88.51 km/h) | 54.9 mph (88.36 km/h) |
| 60 mph (96.56 km/h) | 59.89 mph (96.39 km/h) |
| 65 mph (104.61 km/h) | 64.88 mph (104.42 km/h) |
| 70 mph (112.65 km/h) | 69.88 mph (112.45 km/h) |
| 75 mph (120.7 km/h) | 74.87 mph (120.49 km/h) |
| 80 mph (128.75 km/h) | 79.86 mph (128.52 km/h) |
| 85 mph (136.79 km/h) | 84.85 mph (136.55 km/h) |
| 90 mph (144.84 km/h) | 89.84 mph (144.58 km/h) |
| 95 mph (152.89 km/h) | 94.83 mph (152.62 km/h) |
| 100 mph (160.93 km/h) | 99.82 mph (160.65 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
