Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 275/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 30.83 (783) | -0.22 (-5.5) -0.7% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 97.53 (2477.15) | 96.85 (2459.87) | -0.68 (-17.28) -0.7% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 5.41 (137.5) | -0.11 (-2.75) -2% |
| Revolutions per mile (km) | 649.68 (403.69) | 654.24 (406.53) | 4.56 (2.84) 0.7% |
275/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.96 km/h) |
| 25 mph (40.23 km/h) | 24.83 mph (39.95 km/h) |
| 30 mph (48.28 km/h) | 29.79 mph (47.94 km/h) |
| 35 mph (56.33 km/h) | 34.76 mph (55.93 km/h) |
| 40 mph (64.37 km/h) | 39.72 mph (63.92 km/h) |
| 45 mph (72.42 km/h) | 44.69 mph (71.92 km/h) |
| 50 mph (80.47 km/h) | 49.65 mph (79.91 km/h) |
| 55 mph (88.51 km/h) | 54.62 mph (87.9 km/h) |
| 60 mph (96.56 km/h) | 59.58 mph (95.89 km/h) |
| 65 mph (104.61 km/h) | 64.55 mph (103.88 km/h) |
| 70 mph (112.65 km/h) | 69.51 mph (111.87 km/h) |
| 75 mph (120.7 km/h) | 74.48 mph (119.86 km/h) |
| 80 mph (128.75 km/h) | 79.44 mph (127.85 km/h) |
| 85 mph (136.79 km/h) | 84.41 mph (135.84 km/h) |
| 90 mph (144.84 km/h) | 89.37 mph (143.83 km/h) |
| 95 mph (152.89 km/h) | 94.34 mph (151.82 km/h) |
| 100 mph (160.93 km/h) | 99.3 mph (159.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1665 | 1934 | 2083 | 2175 | 2274 | 2345 | 2423 | 2515 | 2643 | 2770 | 2912 | 3025 | 3231 | 3457 | 3634 | 3748 | 3812 | 4045 | 4371 | 5080 |
Better Fuel Economy Factory Ratios Increased Power
