Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 34.83 (884.7) | 2.78 (70.5) 8.7% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 100.7 (2557.88) | 109.42 (2779.37) | 8.72 (221.48) 8.7% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 8.42 (213.75) | 1.39 (35.25) 19.7% |
| Revolutions per mile (km) | 629.17 (390.95) | 579.03 (359.79) | -50.14 (-31.15) -8% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.72 km/h) |
| 30 mph (48.28 km/h) | 32.6 mph (52.46 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.2 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.95 km/h) |
| 45 mph (72.42 km/h) | 48.9 mph (78.69 km/h) |
| 50 mph (80.47 km/h) | 54.33 mph (87.43 km/h) |
| 55 mph (88.51 km/h) | 59.76 mph (96.18 km/h) |
| 60 mph (96.56 km/h) | 65.2 mph (104.92 km/h) |
| 65 mph (104.61 km/h) | 70.63 mph (113.67 km/h) |
| 70 mph (112.65 km/h) | 76.06 mph (122.41 km/h) |
| 75 mph (120.7 km/h) | 81.49 mph (131.15 km/h) |
| 80 mph (128.75 km/h) | 86.93 mph (139.9 km/h) |
| 85 mph (136.79 km/h) | 92.36 mph (148.64 km/h) |
| 90 mph (144.84 km/h) | 97.79 mph (157.38 km/h) |
| 95 mph (152.89 km/h) | 103.23 mph (166.13 km/h) |
| 100 mph (160.93 km/h) | 108.66 mph (174.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1474 | 1712 | 1843 | 1925 | 2013 | 2075 | 2144 | 2226 | 2339 | 2452 | 2577 | 2677 | 2859 | 3060 | 3217 | 3317 | 3373 | 3580 | 3869 | 4496 |
Better Fuel Economy Factory Ratios Increased Power
