Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/75-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.24 (869.7) | 32.59 (827.7) | -1.65 (-42) -4.8% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 107.57 (2732.24) | 102.37 (2600.3) | -5.19 (-131.95) -4.8% |
| Sidewall Height inches (mm) | 8.12 (206.25) | 7.29 (185.25) | -0.83 (-21) -10.2% |
| Revolutions per mile (km) | 589.02 (366) | 618.91 (384.57) | 29.89 (18.57) 5.1% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.03 mph (30.63 km/h) |
| 25 mph (40.23 km/h) | 23.79 mph (38.29 km/h) |
| 30 mph (48.28 km/h) | 28.55 mph (45.95 km/h) |
| 35 mph (56.33 km/h) | 33.31 mph (53.61 km/h) |
| 40 mph (64.37 km/h) | 38.07 mph (61.27 km/h) |
| 45 mph (72.42 km/h) | 42.83 mph (68.92 km/h) |
| 50 mph (80.47 km/h) | 47.59 mph (76.58 km/h) |
| 55 mph (88.51 km/h) | 52.34 mph (84.24 km/h) |
| 60 mph (96.56 km/h) | 57.1 mph (91.9 km/h) |
| 65 mph (104.61 km/h) | 61.86 mph (99.56 km/h) |
| 70 mph (112.65 km/h) | 66.62 mph (107.21 km/h) |
| 75 mph (120.7 km/h) | 71.38 mph (114.87 km/h) |
| 80 mph (128.75 km/h) | 76.14 mph (122.53 km/h) |
| 85 mph (136.79 km/h) | 80.9 mph (130.19 km/h) |
| 90 mph (144.84 km/h) | 85.65 mph (137.85 km/h) |
| 95 mph (152.89 km/h) | 90.41 mph (145.5 km/h) |
| 100 mph (160.93 km/h) | 95.17 mph (153.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1575 | 1830 | 1970 | 2058 | 2151 | 2218 | 2292 | 2379 | 2500 | 2621 | 2755 | 2862 | 3056 | 3271 | 3438 | 3545 | 3606 | 3827 | 4135 | 4805 |
Better Fuel Economy Factory Ratios Increased Power
