Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-20 | 285/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.83 (783) | 32.34 (821.5) | 1.52 (38.5) 4.9% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 96.85 (2459.87) | 101.61 (2580.82) | 4.76 (120.95) 4.9% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 6.17 (156.75) | 0.76 (19.25) 14% |
| Revolutions per mile (km) | 654.24 (406.53) | 623.58 (387.47) | -30.66 (-19.05) -4.7% |
285/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.77 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.21 km/h) |
| 30 mph (48.28 km/h) | 31.48 mph (50.65 km/h) |
| 35 mph (56.33 km/h) | 36.72 mph (59.1 km/h) |
| 40 mph (64.37 km/h) | 41.97 mph (67.54 km/h) |
| 45 mph (72.42 km/h) | 47.21 mph (75.98 km/h) |
| 50 mph (80.47 km/h) | 52.46 mph (84.42 km/h) |
| 55 mph (88.51 km/h) | 57.7 mph (92.87 km/h) |
| 60 mph (96.56 km/h) | 62.95 mph (101.31 km/h) |
| 65 mph (104.61 km/h) | 68.2 mph (109.75 km/h) |
| 70 mph (112.65 km/h) | 73.44 mph (118.19 km/h) |
| 75 mph (120.7 km/h) | 78.69 mph (126.64 km/h) |
| 80 mph (128.75 km/h) | 83.93 mph (135.08 km/h) |
| 85 mph (136.79 km/h) | 89.18 mph (143.52 km/h) |
| 90 mph (144.84 km/h) | 94.43 mph (151.96 km/h) |
| 95 mph (152.89 km/h) | 99.67 mph (160.41 km/h) |
| 100 mph (160.93 km/h) | 104.92 mph (168.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1587 | 1843 | 1985 | 2073 | 2168 | 2235 | 2309 | 2397 | 2519 | 2640 | 2775 | 2883 | 3079 | 3295 | 3464 | 3572 | 3633 | 3856 | 4166 | 4842 |
Better Fuel Economy Factory Ratios Increased Power
