Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 50/80-17 | 45/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.15 (511.8) | 19.83 (503.8) | -0.31 (-8) -1.6% |
| Width inches (mm) | 1.97 (50) | 1.77 (45) | -0.2 (-5) -10% |
| Circum. inches (mm) | 63.3 (1607.87) | 62.31 (1582.73) | -0.99 (-25.13) -1.6% |
| Sidewall Height inches (mm) | 1.57 (40) | 1.42 (36) | -0.16 (-4) -10% |
| Revolutions per mile (km) | 1000.92 (621.94) | 1016.81 (631.82) | 15.89 (9.88) 1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.68 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.6 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.53 km/h) |
| 35 mph (56.33 km/h) | 34.45 mph (55.45 km/h) |
| 40 mph (64.37 km/h) | 39.37 mph (63.37 km/h) |
| 45 mph (72.42 km/h) | 44.3 mph (71.29 km/h) |
| 50 mph (80.47 km/h) | 49.22 mph (79.21 km/h) |
| 55 mph (88.51 km/h) | 54.14 mph (87.13 km/h) |
| 60 mph (96.56 km/h) | 59.06 mph (95.05 km/h) |
| 65 mph (104.61 km/h) | 63.98 mph (102.97 km/h) |
| 70 mph (112.65 km/h) | 68.91 mph (110.89 km/h) |
| 75 mph (120.7 km/h) | 73.83 mph (118.81 km/h) |
| 80 mph (128.75 km/h) | 78.75 mph (126.74 km/h) |
| 85 mph (136.79 km/h) | 83.67 mph (134.66 km/h) |
| 90 mph (144.84 km/h) | 88.59 mph (142.58 km/h) |
| 95 mph (152.89 km/h) | 93.52 mph (150.5 km/h) |
| 100 mph (160.93 km/h) | 98.44 mph (158.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
