Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 27.85 (707.5) | 1.46 (37) 5.5% |
| Width inches (mm) | 12.8 (325) | 11.22 (285) | -1.57 (-40) -12.3% |
| Circum. inches (mm) | 82.93 (2106.44) | 87.51 (2222.68) | 4.58 (116.24) 5.5% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.93 (99.75) | 0.73 (18.5) 22.8% |
| Revolutions per mile (km) | 764.01 (474.73) | 724.06 (449.91) | -39.96 (-24.83) -5.2% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.96 km/h) |
| 25 mph (40.23 km/h) | 26.38 mph (42.45 km/h) |
| 30 mph (48.28 km/h) | 31.66 mph (50.94 km/h) |
| 35 mph (56.33 km/h) | 36.93 mph (59.44 km/h) |
| 40 mph (64.37 km/h) | 42.21 mph (67.93 km/h) |
| 45 mph (72.42 km/h) | 47.48 mph (76.42 km/h) |
| 50 mph (80.47 km/h) | 52.76 mph (84.91 km/h) |
| 55 mph (88.51 km/h) | 58.04 mph (93.4 km/h) |
| 60 mph (96.56 km/h) | 63.31 mph (101.89 km/h) |
| 65 mph (104.61 km/h) | 68.59 mph (110.38 km/h) |
| 70 mph (112.65 km/h) | 73.86 mph (118.87 km/h) |
| 75 mph (120.7 km/h) | 79.14 mph (127.36 km/h) |
| 80 mph (128.75 km/h) | 84.41 mph (135.85 km/h) |
| 85 mph (136.79 km/h) | 89.69 mph (144.34 km/h) |
| 90 mph (144.84 km/h) | 94.97 mph (152.83 km/h) |
| 95 mph (152.89 km/h) | 100.24 mph (161.32 km/h) |
| 100 mph (160.93 km/h) | 105.52 mph (169.82 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
