Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 27.85 (707.5) | -0.81 (-20.5) -2.8% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 90.04 (2287.08) | 87.51 (2222.68) | -2.54 (-64.4) -2.8% |
| Sidewall Height inches (mm) | 4.33 (110) | 3.93 (99.75) | -0.4 (-10.25) -9.3% |
| Revolutions per mile (km) | 703.67 (437.24) | 724.06 (449.91) | 20.39 (12.67) 2.9% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.74 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.56 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.38 km/h) |
| 50 mph (80.47 km/h) | 48.59 mph (78.2 km/h) |
| 55 mph (88.51 km/h) | 53.45 mph (86.02 km/h) |
| 60 mph (96.56 km/h) | 58.31 mph (93.84 km/h) |
| 65 mph (104.61 km/h) | 63.17 mph (101.66 km/h) |
| 70 mph (112.65 km/h) | 68.03 mph (109.48 km/h) |
| 75 mph (120.7 km/h) | 72.89 mph (117.3 km/h) |
| 80 mph (128.75 km/h) | 77.75 mph (125.12 km/h) |
| 85 mph (136.79 km/h) | 82.61 mph (132.94 km/h) |
| 90 mph (144.84 km/h) | 87.47 mph (140.76 km/h) |
| 95 mph (152.89 km/h) | 92.32 mph (148.58 km/h) |
| 100 mph (160.93 km/h) | 97.18 mph (156.4 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
