Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (696) | 27.85 (707.5) | 0.45 (11.5) 1.7% |
| Width inches (mm) | 9.25 (235) | 11.22 (285) | 1.97 (50) 21.3% |
| Circum. inches (mm) | 86.08 (2186.55) | 87.51 (2222.68) | 1.42 (36.13) 1.7% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.93 (99.75) | 0.23 (5.75) 6.1% |
| Revolutions per mile (km) | 736.02 (457.34) | 724.06 (449.91) | -11.96 (-7.43) -1.6% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.33 mph (32.72 km/h) |
| 25 mph (40.23 km/h) | 25.41 mph (40.9 km/h) |
| 30 mph (48.28 km/h) | 30.5 mph (49.08 km/h) |
| 35 mph (56.33 km/h) | 35.58 mph (57.26 km/h) |
| 40 mph (64.37 km/h) | 40.66 mph (65.44 km/h) |
| 45 mph (72.42 km/h) | 45.74 mph (73.62 km/h) |
| 50 mph (80.47 km/h) | 50.83 mph (81.8 km/h) |
| 55 mph (88.51 km/h) | 55.91 mph (89.98 km/h) |
| 60 mph (96.56 km/h) | 60.99 mph (98.16 km/h) |
| 65 mph (104.61 km/h) | 66.07 mph (106.34 km/h) |
| 70 mph (112.65 km/h) | 71.16 mph (114.52 km/h) |
| 75 mph (120.7 km/h) | 76.24 mph (122.7 km/h) |
| 80 mph (128.75 km/h) | 81.32 mph (130.88 km/h) |
| 85 mph (136.79 km/h) | 86.4 mph (139.05 km/h) |
| 90 mph (144.84 km/h) | 91.49 mph (147.23 km/h) |
| 95 mph (152.89 km/h) | 96.57 mph (155.41 km/h) |
| 100 mph (160.93 km/h) | 101.65 mph (163.59 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
