Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/65-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.56 (801.7) | 34.83 (884.7) | 3.27 (83) 10.4% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 99.16 (2518.61) | 109.42 (2779.37) | 10.27 (260.75) 10.4% |
| Sidewall Height inches (mm) | 6.78 (172.25) | 8.42 (213.75) | 1.63 (41.5) 24.1% |
| Revolutions per mile (km) | 638.98 (397.04) | 579.03 (359.79) | -59.95 (-37.25) -9.4% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.07 mph (35.52 km/h) |
| 25 mph (40.23 km/h) | 27.59 mph (44.4 km/h) |
| 30 mph (48.28 km/h) | 33.11 mph (53.28 km/h) |
| 35 mph (56.33 km/h) | 38.62 mph (62.16 km/h) |
| 40 mph (64.37 km/h) | 44.14 mph (71.04 km/h) |
| 45 mph (72.42 km/h) | 49.66 mph (79.92 km/h) |
| 50 mph (80.47 km/h) | 55.18 mph (88.8 km/h) |
| 55 mph (88.51 km/h) | 60.69 mph (97.68 km/h) |
| 60 mph (96.56 km/h) | 66.21 mph (106.56 km/h) |
| 65 mph (104.61 km/h) | 71.73 mph (115.44 km/h) |
| 70 mph (112.65 km/h) | 77.25 mph (124.32 km/h) |
| 75 mph (120.7 km/h) | 82.76 mph (133.2 km/h) |
| 80 mph (128.75 km/h) | 88.28 mph (142.08 km/h) |
| 85 mph (136.79 km/h) | 93.8 mph (150.96 km/h) |
| 90 mph (144.84 km/h) | 99.32 mph (159.84 km/h) |
| 95 mph (152.89 km/h) | 104.84 mph (168.72 km/h) |
| 100 mph (160.93 km/h) | 110.35 mph (177.6 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
