Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-17 | 190/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 27.47 (697.8) | 1.97 (50) 7.7% |
| Width inches (mm) | 7.09 (180) | 7.48 (190) | 0.39 (10) 5.6% |
| Circum. inches (mm) | 80.12 (2035.12) | 86.31 (2192.2) | 6.18 (157.08) 7.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.24 (133) | 0.98 (25) 23.1% |
| Revolutions per mile (km) | 790.78 (491.37) | 734.12 (456.16) | -56.66 (-35.21) -7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.54 mph (34.67 km/h) |
| 25 mph (40.23 km/h) | 26.93 mph (43.34 km/h) |
| 30 mph (48.28 km/h) | 32.32 mph (52.01 km/h) |
| 35 mph (56.33 km/h) | 37.7 mph (60.67 km/h) |
| 40 mph (64.37 km/h) | 43.09 mph (69.34 km/h) |
| 45 mph (72.42 km/h) | 48.47 mph (78.01 km/h) |
| 50 mph (80.47 km/h) | 53.86 mph (86.68 km/h) |
| 55 mph (88.51 km/h) | 59.25 mph (95.35 km/h) |
| 60 mph (96.56 km/h) | 64.63 mph (104.01 km/h) |
| 65 mph (104.61 km/h) | 70.02 mph (112.68 km/h) |
| 70 mph (112.65 km/h) | 75.4 mph (121.35 km/h) |
| 75 mph (120.7 km/h) | 80.79 mph (130.02 km/h) |
| 80 mph (128.75 km/h) | 86.17 mph (138.69 km/h) |
| 85 mph (136.79 km/h) | 91.56 mph (147.35 km/h) |
| 90 mph (144.84 km/h) | 96.95 mph (156.02 km/h) |
| 95 mph (152.89 km/h) | 102.33 mph (164.69 km/h) |
| 100 mph (160.93 km/h) | 107.72 mph (173.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1868 | 2170 | 2337 | 2441 | 2552 | 2631 | 2719 | 2822 | 2965 | 3108 | 3267 | 3395 | 3625 | 3879 | 4078 | 4205 | 4277 | 4539 | 4905 | 5700 |
Better Fuel Economy Factory Ratios Increased Power
