Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 275/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 29.91 (759.7) | -0.43 (-11) -1.4% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 95.32 (2421.23) | 93.96 (2386.67) | -1.36 (-34.56) -1.4% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 5.95 (151.25) | -0.22 (-5.5) -3.5% |
| Revolutions per mile (km) | 664.68 (413.01) | 674.31 (418.99) | 9.62 (5.98) 1.4% |
275/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.71 mph (31.73 km/h) |
| 25 mph (40.23 km/h) | 24.64 mph (39.66 km/h) |
| 30 mph (48.28 km/h) | 29.57 mph (47.59 km/h) |
| 35 mph (56.33 km/h) | 34.5 mph (55.52 km/h) |
| 40 mph (64.37 km/h) | 39.43 mph (63.46 km/h) |
| 45 mph (72.42 km/h) | 44.36 mph (71.39 km/h) |
| 50 mph (80.47 km/h) | 49.29 mph (79.32 km/h) |
| 55 mph (88.51 km/h) | 54.21 mph (87.25 km/h) |
| 60 mph (96.56 km/h) | 59.14 mph (95.18 km/h) |
| 65 mph (104.61 km/h) | 64.07 mph (103.11 km/h) |
| 70 mph (112.65 km/h) | 69 mph (111.05 km/h) |
| 75 mph (120.7 km/h) | 73.93 mph (118.98 km/h) |
| 80 mph (128.75 km/h) | 78.86 mph (126.91 km/h) |
| 85 mph (136.79 km/h) | 83.79 mph (134.84 km/h) |
| 90 mph (144.84 km/h) | 88.72 mph (142.77 km/h) |
| 95 mph (152.89 km/h) | 93.64 mph (150.71 km/h) |
| 100 mph (160.93 km/h) | 98.57 mph (158.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1716 | 1993 | 2147 | 2242 | 2344 | 2417 | 2497 | 2592 | 2724 | 2855 | 3001 | 3118 | 3330 | 3563 | 3746 | 3863 | 3928 | 4169 | 4505 | 5236 |
Better Fuel Economy Factory Ratios Increased Power
