Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.99 (787.2) | 32.59 (827.7) | 1.59 (40.5) 5.1% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 97.36 (2473.06) | 102.37 (2600.3) | 5.01 (127.23) 5.1% |
| Sidewall Height inches (mm) | 6.5 (165) | 7.29 (185.25) | 0.8 (20.25) 12.3% |
| Revolutions per mile (km) | 650.75 (404.36) | 618.91 (384.57) | -31.84 (-19.79) -4.9% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.84 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.3 km/h) |
| 30 mph (48.28 km/h) | 31.54 mph (50.76 km/h) |
| 35 mph (56.33 km/h) | 36.8 mph (59.23 km/h) |
| 40 mph (64.37 km/h) | 42.06 mph (67.69 km/h) |
| 45 mph (72.42 km/h) | 47.32 mph (76.15 km/h) |
| 50 mph (80.47 km/h) | 52.57 mph (84.61 km/h) |
| 55 mph (88.51 km/h) | 57.83 mph (93.07 km/h) |
| 60 mph (96.56 km/h) | 63.09 mph (101.53 km/h) |
| 65 mph (104.61 km/h) | 68.34 mph (109.99 km/h) |
| 70 mph (112.65 km/h) | 73.6 mph (118.45 km/h) |
| 75 mph (120.7 km/h) | 78.86 mph (126.91 km/h) |
| 80 mph (128.75 km/h) | 84.12 mph (135.37 km/h) |
| 85 mph (136.79 km/h) | 89.37 mph (143.83 km/h) |
| 90 mph (144.84 km/h) | 94.63 mph (152.29 km/h) |
| 95 mph (152.89 km/h) | 99.89 mph (160.75 km/h) |
| 100 mph (160.93 km/h) | 105.14 mph (169.21 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
