Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 31.91 (810.5) | 1.57 (39.8) 5.2% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 95.32 (2421.23) | 100.25 (2546.26) | 4.92 (125.04) 5.2% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 5.95 (151.25) | -0.22 (-5.5) -3.5% |
| Revolutions per mile (km) | 664.68 (413.01) | 632.04 (392.73) | -32.64 (-20.28) -4.9% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.31 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.77 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.24 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.7 km/h) |
| 45 mph (72.42 km/h) | 47.32 mph (76.16 km/h) |
| 50 mph (80.47 km/h) | 52.58 mph (84.62 km/h) |
| 55 mph (88.51 km/h) | 57.84 mph (93.09 km/h) |
| 60 mph (96.56 km/h) | 63.1 mph (101.55 km/h) |
| 65 mph (104.61 km/h) | 68.36 mph (110.01 km/h) |
| 70 mph (112.65 km/h) | 73.61 mph (118.47 km/h) |
| 75 mph (120.7 km/h) | 78.87 mph (126.93 km/h) |
| 80 mph (128.75 km/h) | 84.13 mph (135.4 km/h) |
| 85 mph (136.79 km/h) | 89.39 mph (143.86 km/h) |
| 90 mph (144.84 km/h) | 94.65 mph (152.32 km/h) |
| 95 mph (152.89 km/h) | 99.91 mph (160.78 km/h) |
| 100 mph (160.93 km/h) | 105.16 mph (169.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
Better Fuel Economy Factory Ratios Increased Power
