Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/80-15 | 190/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.71 (653) | 22.48 (571) | -3.23 (-82) -12.6% |
| Width inches (mm) | 6.69 (170) | 7.48 (190) | 0.79 (20) 11.8% |
| Circum. inches (mm) | 80.77 (2051.46) | 70.62 (1793.85) | -10.14 (-257.61) -12.6% |
| Sidewall Height inches (mm) | 5.35 (136) | 3.74 (95) | -1.61 (-41) -30.1% |
| Revolutions per mile (km) | 784.49 (487.46) | 897.15 (557.46) | 112.66 (70) 14.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.49 mph (28.15 km/h) |
| 25 mph (40.23 km/h) | 21.86 mph (35.18 km/h) |
| 30 mph (48.28 km/h) | 26.23 mph (42.22 km/h) |
| 35 mph (56.33 km/h) | 30.6 mph (49.25 km/h) |
| 40 mph (64.37 km/h) | 34.98 mph (56.29 km/h) |
| 45 mph (72.42 km/h) | 39.35 mph (63.33 km/h) |
| 50 mph (80.47 km/h) | 43.72 mph (70.36 km/h) |
| 55 mph (88.51 km/h) | 48.09 mph (77.4 km/h) |
| 60 mph (96.56 km/h) | 52.47 mph (84.44 km/h) |
| 65 mph (104.61 km/h) | 56.84 mph (91.47 km/h) |
| 70 mph (112.65 km/h) | 61.21 mph (98.51 km/h) |
| 75 mph (120.7 km/h) | 65.58 mph (105.54 km/h) |
| 80 mph (128.75 km/h) | 69.95 mph (112.58 km/h) |
| 85 mph (136.79 km/h) | 74.33 mph (119.62 km/h) |
| 90 mph (144.84 km/h) | 78.7 mph (126.65 km/h) |
| 95 mph (152.89 km/h) | 83.07 mph (133.69 km/h) |
| 100 mph (160.93 km/h) | 87.44 mph (140.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2283 | 2652 | 2856 | 2983 | 3119 | 3216 | 3323 | 3449 | 3624 | 3799 | 3993 | 4148 | 4430 | 4741 | 4984 | 5139 | 5227 | 5547 | 5994 | 6966 |
Better Fuel Economy Factory Ratios Increased Power
