Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/80-15 | 190/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.71 (653) | 26.97 (685) | 1.26 (32) 4.9% |
| Width inches (mm) | 6.69 (170) | 7.48 (190) | 0.79 (20) 11.8% |
| Circum. inches (mm) | 80.77 (2051.46) | 84.72 (2151.99) | 3.96 (100.53) 4.9% |
| Sidewall Height inches (mm) | 5.35 (136) | 5.98 (152) | 0.63 (16) 11.8% |
| Revolutions per mile (km) | 784.49 (487.46) | 747.84 (464.69) | -36.65 (-22.77) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.76 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.21 km/h) |
| 30 mph (48.28 km/h) | 31.47 mph (50.65 km/h) |
| 35 mph (56.33 km/h) | 36.72 mph (59.09 km/h) |
| 40 mph (64.37 km/h) | 41.96 mph (67.53 km/h) |
| 45 mph (72.42 km/h) | 47.21 mph (75.97 km/h) |
| 50 mph (80.47 km/h) | 52.45 mph (84.41 km/h) |
| 55 mph (88.51 km/h) | 57.7 mph (92.85 km/h) |
| 60 mph (96.56 km/h) | 62.94 mph (101.29 km/h) |
| 65 mph (104.61 km/h) | 68.19 mph (109.73 km/h) |
| 70 mph (112.65 km/h) | 73.43 mph (118.17 km/h) |
| 75 mph (120.7 km/h) | 78.68 mph (126.62 km/h) |
| 80 mph (128.75 km/h) | 83.92 mph (135.06 km/h) |
| 85 mph (136.79 km/h) | 89.17 mph (143.5 km/h) |
| 90 mph (144.84 km/h) | 94.41 mph (151.94 km/h) |
| 95 mph (152.89 km/h) | 99.66 mph (160.38 km/h) |
| 100 mph (160.93 km/h) | 104.9 mph (168.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1903 | 2211 | 2381 | 2486 | 2600 | 2681 | 2770 | 2875 | 3021 | 3166 | 3328 | 3458 | 3693 | 3952 | 4154 | 4284 | 4357 | 4624 | 4997 | 5807 |
Better Fuel Economy Factory Ratios Increased Power
