Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/60-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.41 (823.2) | 32.59 (827.7) | 0.18 (4.5) 0.5% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 101.82 (2586.16) | 102.37 (2600.3) | 0.56 (14.14) 0.5% |
| Sidewall Height inches (mm) | 7.2 (183) | 7.29 (185.25) | 0.09 (2.25) 1.2% |
| Revolutions per mile (km) | 622.29 (386.67) | 618.91 (384.57) | -3.38 (-2.1) -0.5% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.11 mph (32.36 km/h) |
| 25 mph (40.23 km/h) | 25.14 mph (40.45 km/h) |
| 30 mph (48.28 km/h) | 30.16 mph (48.54 km/h) |
| 35 mph (56.33 km/h) | 35.19 mph (56.64 km/h) |
| 40 mph (64.37 km/h) | 40.22 mph (64.73 km/h) |
| 45 mph (72.42 km/h) | 45.25 mph (72.82 km/h) |
| 50 mph (80.47 km/h) | 50.27 mph (80.91 km/h) |
| 55 mph (88.51 km/h) | 55.3 mph (89 km/h) |
| 60 mph (96.56 km/h) | 60.33 mph (97.09 km/h) |
| 65 mph (104.61 km/h) | 65.36 mph (105.18 km/h) |
| 70 mph (112.65 km/h) | 70.38 mph (113.27 km/h) |
| 75 mph (120.7 km/h) | 75.41 mph (121.36 km/h) |
| 80 mph (128.75 km/h) | 80.44 mph (129.45 km/h) |
| 85 mph (136.79 km/h) | 85.46 mph (137.54 km/h) |
| 90 mph (144.84 km/h) | 90.49 mph (145.63 km/h) |
| 95 mph (152.89 km/h) | 95.52 mph (153.72 km/h) |
| 100 mph (160.93 km/h) | 100.55 mph (161.81 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
