Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/30-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673) | 27.85 (707.5) | 1.36 (34.5) 5.1% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 83.24 (2114.29) | 87.51 (2222.68) | 4.27 (108.38) 5.1% |
| Sidewall Height inches (mm) | 3.25 (82.5) | 3.93 (99.75) | 0.68 (17.25) 20.9% |
| Revolutions per mile (km) | 761.17 (472.97) | 724.06 (449.91) | -37.12 (-23.06) -4.9% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.84 km/h) |
| 25 mph (40.23 km/h) | 26.28 mph (42.3 km/h) |
| 30 mph (48.28 km/h) | 31.54 mph (50.76 km/h) |
| 35 mph (56.33 km/h) | 36.79 mph (59.21 km/h) |
| 40 mph (64.37 km/h) | 42.05 mph (67.67 km/h) |
| 45 mph (72.42 km/h) | 47.31 mph (76.13 km/h) |
| 50 mph (80.47 km/h) | 52.56 mph (84.59 km/h) |
| 55 mph (88.51 km/h) | 57.82 mph (93.05 km/h) |
| 60 mph (96.56 km/h) | 63.08 mph (101.51 km/h) |
| 65 mph (104.61 km/h) | 68.33 mph (109.97 km/h) |
| 70 mph (112.65 km/h) | 73.59 mph (118.43 km/h) |
| 75 mph (120.7 km/h) | 78.84 mph (126.89 km/h) |
| 80 mph (128.75 km/h) | 84.1 mph (135.35 km/h) |
| 85 mph (136.79 km/h) | 89.36 mph (143.81 km/h) |
| 90 mph (144.84 km/h) | 94.61 mph (152.27 km/h) |
| 95 mph (152.89 km/h) | 99.87 mph (160.73 km/h) |
| 100 mph (160.93 km/h) | 105.13 mph (169.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1843 | 2141 | 2305 | 2407 | 2517 | 2595 | 2682 | 2783 | 2925 | 3066 | 3223 | 3348 | 3575 | 3826 | 4022 | 4148 | 4218 | 4477 | 4838 | 5622 |
Better Fuel Economy Factory Ratios Increased Power
