Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 285/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 40.2 (1021) | 2.87 (73) 7.7% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 117.25 (2978.23) | 126.28 (3207.57) | 9.03 (229.34) 7.7% |
| Sidewall Height inches (mm) | 8.66 (220) | 10.1 (256.5) | 1.44 (36.5) 16.6% |
| Revolutions per mile (km) | 540.37 (335.77) | 501.73 (311.76) | -38.64 (-24.01) -7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.54 mph (34.67 km/h) |
| 25 mph (40.23 km/h) | 26.93 mph (43.33 km/h) |
| 30 mph (48.28 km/h) | 32.31 mph (52 km/h) |
| 35 mph (56.33 km/h) | 37.7 mph (60.66 km/h) |
| 40 mph (64.37 km/h) | 43.08 mph (69.33 km/h) |
| 45 mph (72.42 km/h) | 48.47 mph (78 km/h) |
| 50 mph (80.47 km/h) | 53.85 mph (86.66 km/h) |
| 55 mph (88.51 km/h) | 59.24 mph (95.33 km/h) |
| 60 mph (96.56 km/h) | 64.62 mph (104 km/h) |
| 65 mph (104.61 km/h) | 70.01 mph (112.66 km/h) |
| 70 mph (112.65 km/h) | 75.39 mph (121.33 km/h) |
| 75 mph (120.7 km/h) | 80.78 mph (130 km/h) |
| 80 mph (128.75 km/h) | 86.16 mph (138.66 km/h) |
| 85 mph (136.79 km/h) | 91.55 mph (147.33 km/h) |
| 90 mph (144.84 km/h) | 96.93 mph (155.99 km/h) |
| 95 mph (152.89 km/h) | 102.32 mph (164.66 km/h) |
| 100 mph (160.93 km/h) | 107.7 mph (173.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1277 | 1483 | 1597 | 1668 | 1744 | 1798 | 1858 | 1929 | 2027 | 2124 | 2233 | 2320 | 2478 | 2651 | 2787 | 2874 | 2923 | 3102 | 3352 | 3896 |
Better Fuel Economy Factory Ratios Increased Power
