Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 32.07 (814.7) | 1.73 (44) 5.7% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 95.32 (2421.23) | 100.77 (2559.46) | 5.44 (138.23) 5.7% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 7.04 (178.75) | 0.87 (22) 14% |
| Revolutions per mile (km) | 664.68 (413.01) | 628.78 (390.71) | -35.9 (-22.31) -5.4% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.14 mph (34.02 km/h) |
| 25 mph (40.23 km/h) | 26.43 mph (42.53 km/h) |
| 30 mph (48.28 km/h) | 31.71 mph (51.04 km/h) |
| 35 mph (56.33 km/h) | 37 mph (59.54 km/h) |
| 40 mph (64.37 km/h) | 42.28 mph (68.05 km/h) |
| 45 mph (72.42 km/h) | 47.57 mph (76.56 km/h) |
| 50 mph (80.47 km/h) | 52.85 mph (85.06 km/h) |
| 55 mph (88.51 km/h) | 58.14 mph (93.57 km/h) |
| 60 mph (96.56 km/h) | 63.43 mph (102.07 km/h) |
| 65 mph (104.61 km/h) | 68.71 mph (110.58 km/h) |
| 70 mph (112.65 km/h) | 74 mph (119.09 km/h) |
| 75 mph (120.7 km/h) | 79.28 mph (127.59 km/h) |
| 80 mph (128.75 km/h) | 84.57 mph (136.1 km/h) |
| 85 mph (136.79 km/h) | 89.85 mph (144.6 km/h) |
| 90 mph (144.84 km/h) | 95.14 mph (153.11 km/h) |
| 95 mph (152.89 km/h) | 100.42 mph (161.62 km/h) |
| 100 mph (160.93 km/h) | 105.71 mph (170.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
Better Fuel Economy Factory Ratios Increased Power
