Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 190/55-15 | 180/66-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.23 (590) | 23.35 (593.2) | 0.13 (3.2) 0.5% |
| Width inches (mm) | 7.48 (190) | 7.09 (180) | -0.39 (-10) -5.3% |
| Circum. inches (mm) | 72.97 (1853.54) | 73.37 (1863.59) | 0.4 (10.05) 0.5% |
| Sidewall Height inches (mm) | 4.11 (104.5) | 4.68 (118.8) | 0.56 (14.3) 13.7% |
| Revolutions per mile (km) | 868.25 (539.51) | 863.57 (536.6) | -4.68 (-2.91) -0.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.11 mph (32.36 km/h) |
| 25 mph (40.23 km/h) | 25.14 mph (40.45 km/h) |
| 30 mph (48.28 km/h) | 30.16 mph (48.54 km/h) |
| 35 mph (56.33 km/h) | 35.19 mph (56.63 km/h) |
| 40 mph (64.37 km/h) | 40.22 mph (64.72 km/h) |
| 45 mph (72.42 km/h) | 45.24 mph (72.81 km/h) |
| 50 mph (80.47 km/h) | 50.27 mph (80.9 km/h) |
| 55 mph (88.51 km/h) | 55.3 mph (88.99 km/h) |
| 60 mph (96.56 km/h) | 60.33 mph (97.08 km/h) |
| 65 mph (104.61 km/h) | 65.35 mph (105.17 km/h) |
| 70 mph (112.65 km/h) | 70.38 mph (113.27 km/h) |
| 75 mph (120.7 km/h) | 75.41 mph (121.36 km/h) |
| 80 mph (128.75 km/h) | 80.43 mph (129.45 km/h) |
| 85 mph (136.79 km/h) | 85.46 mph (137.54 km/h) |
| 90 mph (144.84 km/h) | 90.49 mph (145.63 km/h) |
| 95 mph (152.89 km/h) | 95.52 mph (153.72 km/h) |
| 100 mph (160.93 km/h) | 100.54 mph (161.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2198 | 2553 | 2749 | 2871 | 3002 | 3095 | 3198 | 3320 | 3488 | 3656 | 3844 | 3993 | 4264 | 4564 | 4797 | 4947 | 5031 | 5340 | 5770 | 6705 |
Better Fuel Economy Factory Ratios Increased Power
