Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.07 (814.7) | 32.59 (827.7) | 0.51 (13) 1.6% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 100.77 (2559.46) | 102.37 (2600.3) | 1.61 (40.84) 1.6% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.29 (185.25) | 0.26 (6.5) 3.6% |
| Revolutions per mile (km) | 628.78 (390.71) | 618.91 (384.57) | -9.88 (-6.14) -1.6% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.32 mph (32.7 km/h) |
| 25 mph (40.23 km/h) | 25.4 mph (40.88 km/h) |
| 30 mph (48.28 km/h) | 30.48 mph (49.05 km/h) |
| 35 mph (56.33 km/h) | 35.56 mph (57.23 km/h) |
| 40 mph (64.37 km/h) | 40.64 mph (65.4 km/h) |
| 45 mph (72.42 km/h) | 45.72 mph (73.58 km/h) |
| 50 mph (80.47 km/h) | 50.8 mph (81.75 km/h) |
| 55 mph (88.51 km/h) | 55.88 mph (89.93 km/h) |
| 60 mph (96.56 km/h) | 60.96 mph (98.1 km/h) |
| 65 mph (104.61 km/h) | 66.04 mph (106.28 km/h) |
| 70 mph (112.65 km/h) | 71.12 mph (114.45 km/h) |
| 75 mph (120.7 km/h) | 76.2 mph (122.63 km/h) |
| 80 mph (128.75 km/h) | 81.28 mph (130.8 km/h) |
| 85 mph (136.79 km/h) | 86.36 mph (138.98 km/h) |
| 90 mph (144.84 km/h) | 91.44 mph (147.15 km/h) |
| 95 mph (152.89 km/h) | 96.52 mph (155.33 km/h) |
| 100 mph (160.93 km/h) | 101.6 mph (163.5 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
