Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.16 (842.2) | 32.59 (827.7) | -0.57 (-14.5) -1.7% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 104.17 (2645.85) | 102.37 (2600.3) | -1.79 (-45.55) -1.7% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.29 (185.25) | -0.29 (-7.25) -3.8% |
| Revolutions per mile (km) | 608.25 (377.95) | 618.91 (384.57) | 10.66 (6.62) 1.8% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.66 mph (31.63 km/h) |
| 25 mph (40.23 km/h) | 24.57 mph (39.54 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.45 km/h) |
| 35 mph (56.33 km/h) | 34.4 mph (55.36 km/h) |
| 40 mph (64.37 km/h) | 39.31 mph (63.27 km/h) |
| 45 mph (72.42 km/h) | 44.23 mph (71.17 km/h) |
| 50 mph (80.47 km/h) | 49.14 mph (79.08 km/h) |
| 55 mph (88.51 km/h) | 54.05 mph (86.99 km/h) |
| 60 mph (96.56 km/h) | 58.97 mph (94.9 km/h) |
| 65 mph (104.61 km/h) | 63.88 mph (102.81 km/h) |
| 70 mph (112.65 km/h) | 68.79 mph (110.71 km/h) |
| 75 mph (120.7 km/h) | 73.71 mph (118.62 km/h) |
| 80 mph (128.75 km/h) | 78.62 mph (126.53 km/h) |
| 85 mph (136.79 km/h) | 83.54 mph (134.44 km/h) |
| 90 mph (144.84 km/h) | 88.45 mph (142.35 km/h) |
| 95 mph (152.89 km/h) | 93.36 mph (150.26 km/h) |
| 100 mph (160.93 km/h) | 98.28 mph (158.16 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
