Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-19 | 185/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.56 (674.6) | 28.65 (727.8) | 2.09 (53.2) 7.9% |
| Width inches (mm) | 4.72 (120) | 7.28 (185) | 2.56 (65) 54.2% |
| Circum. inches (mm) | 83.44 (2119.32) | 90.02 (2286.45) | 6.58 (167.13) 7.9% |
| Sidewall Height inches (mm) | 3.78 (96) | 5.83 (148) | 2.05 (52) 54.2% |
| Revolutions per mile (km) | 759.37 (471.85) | 703.86 (437.36) | -55.51 (-34.49) -7.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.58 mph (34.73 km/h) |
| 25 mph (40.23 km/h) | 26.97 mph (43.41 km/h) |
| 30 mph (48.28 km/h) | 32.37 mph (52.09 km/h) |
| 35 mph (56.33 km/h) | 37.76 mph (60.77 km/h) |
| 40 mph (64.37 km/h) | 43.15 mph (69.45 km/h) |
| 45 mph (72.42 km/h) | 48.55 mph (78.13 km/h) |
| 50 mph (80.47 km/h) | 53.94 mph (86.81 km/h) |
| 55 mph (88.51 km/h) | 59.34 mph (95.49 km/h) |
| 60 mph (96.56 km/h) | 64.73 mph (104.18 km/h) |
| 65 mph (104.61 km/h) | 70.13 mph (112.86 km/h) |
| 70 mph (112.65 km/h) | 75.52 mph (121.54 km/h) |
| 75 mph (120.7 km/h) | 80.91 mph (130.22 km/h) |
| 80 mph (128.75 km/h) | 86.31 mph (138.9 km/h) |
| 85 mph (136.79 km/h) | 91.7 mph (147.58 km/h) |
| 90 mph (144.84 km/h) | 97.1 mph (156.26 km/h) |
| 95 mph (152.89 km/h) | 102.49 mph (164.94 km/h) |
| 100 mph (160.93 km/h) | 107.89 mph (173.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1791 | 2081 | 2241 | 2340 | 2447 | 2523 | 2607 | 2706 | 2843 | 2980 | 3133 | 3255 | 3476 | 3720 | 3910 | 4032 | 4101 | 4352 | 4703 | 5465 |
Better Fuel Economy Factory Ratios Increased Power
