Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-18 | 285/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.04 (686.7) | 28.1 (713.7) | 1.06 (27) 3.9% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 84.93 (2157.33) | 88.27 (2242.15) | 3.34 (84.82) 3.9% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 5.05 (128.25) | 0.53 (13.5) 11.8% |
| Revolutions per mile (km) | 745.99 (463.53) | 717.77 (446) | -28.22 (-17.54) -3.8% |
285/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.79 mph (33.45 km/h) |
| 25 mph (40.23 km/h) | 25.98 mph (41.82 km/h) |
| 30 mph (48.28 km/h) | 31.18 mph (50.18 km/h) |
| 35 mph (56.33 km/h) | 36.38 mph (58.54 km/h) |
| 40 mph (64.37 km/h) | 41.57 mph (66.9 km/h) |
| 45 mph (72.42 km/h) | 46.77 mph (75.27 km/h) |
| 50 mph (80.47 km/h) | 51.97 mph (83.63 km/h) |
| 55 mph (88.51 km/h) | 57.16 mph (91.99 km/h) |
| 60 mph (96.56 km/h) | 62.36 mph (100.36 km/h) |
| 65 mph (104.61 km/h) | 67.56 mph (108.72 km/h) |
| 70 mph (112.65 km/h) | 72.75 mph (117.08 km/h) |
| 75 mph (120.7 km/h) | 77.95 mph (125.45 km/h) |
| 80 mph (128.75 km/h) | 83.15 mph (133.81 km/h) |
| 85 mph (136.79 km/h) | 88.34 mph (142.17 km/h) |
| 90 mph (144.84 km/h) | 93.54 mph (150.54 km/h) |
| 95 mph (152.89 km/h) | 98.74 mph (158.9 km/h) |
| 100 mph (160.93 km/h) | 103.93 mph (167.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1827 | 2122 | 2285 | 2386 | 2495 | 2573 | 2658 | 2759 | 2899 | 3039 | 3195 | 3319 | 3544 | 3793 | 3987 | 4112 | 4182 | 4438 | 4796 | 5573 |
Better Fuel Economy Factory Ratios Increased Power
