Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/60-18 | 225/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.63 (727.2) | 30.63 (778) | 2 (50.8) 7% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 89.94 (2284.57) | 96.23 (2444.16) | 6.28 (159.59) 7% |
| Sidewall Height inches (mm) | 5.31 (135) | 5.31 (135) | 0 (0) 0% |
| Revolutions per mile (km) | 704.44 (437.72) | 658.44 (409.14) | -46 (-28.58) -6.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.4 mph (34.44 km/h) |
| 25 mph (40.23 km/h) | 26.75 mph (43.04 km/h) |
| 30 mph (48.28 km/h) | 32.1 mph (51.65 km/h) |
| 35 mph (56.33 km/h) | 37.44 mph (60.26 km/h) |
| 40 mph (64.37 km/h) | 42.79 mph (68.87 km/h) |
| 45 mph (72.42 km/h) | 48.14 mph (77.48 km/h) |
| 50 mph (80.47 km/h) | 53.49 mph (86.09 km/h) |
| 55 mph (88.51 km/h) | 58.84 mph (94.7 km/h) |
| 60 mph (96.56 km/h) | 64.19 mph (103.31 km/h) |
| 65 mph (104.61 km/h) | 69.54 mph (111.92 km/h) |
| 70 mph (112.65 km/h) | 74.89 mph (120.52 km/h) |
| 75 mph (120.7 km/h) | 80.24 mph (129.13 km/h) |
| 80 mph (128.75 km/h) | 85.59 mph (137.74 km/h) |
| 85 mph (136.79 km/h) | 90.94 mph (146.35 km/h) |
| 90 mph (144.84 km/h) | 96.29 mph (154.96 km/h) |
| 95 mph (152.89 km/h) | 101.64 mph (163.57 km/h) |
| 100 mph (160.93 km/h) | 106.99 mph (172.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1676 | 1947 | 2096 | 2189 | 2289 | 2360 | 2439 | 2531 | 2660 | 2788 | 2931 | 3045 | 3251 | 3480 | 3658 | 3772 | 3836 | 4071 | 4399 | 5112 |
Better Fuel Economy Factory Ratios Increased Power
