Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 185/50-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 26.28 (667.6) | 0.29 (7.4) 1.1% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 81.66 (2074.08) | 82.57 (2097.33) | 0.92 (23.25) 1.1% |
| Sidewall Height inches (mm) | 4 (101.5) | 3.64 (92.5) | -0.35 (-9) -8.9% |
| Revolutions per mile (km) | 775.93 (482.14) | 767.33 (476.8) | -8.6 (-5.34) -1.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.22 mph (32.55 km/h) |
| 25 mph (40.23 km/h) | 25.28 mph (40.68 km/h) |
| 30 mph (48.28 km/h) | 30.34 mph (48.82 km/h) |
| 35 mph (56.33 km/h) | 35.39 mph (56.96 km/h) |
| 40 mph (64.37 km/h) | 40.45 mph (65.1 km/h) |
| 45 mph (72.42 km/h) | 45.5 mph (73.23 km/h) |
| 50 mph (80.47 km/h) | 50.56 mph (81.37 km/h) |
| 55 mph (88.51 km/h) | 55.62 mph (89.51 km/h) |
| 60 mph (96.56 km/h) | 60.67 mph (97.64 km/h) |
| 65 mph (104.61 km/h) | 65.73 mph (105.78 km/h) |
| 70 mph (112.65 km/h) | 70.78 mph (113.92 km/h) |
| 75 mph (120.7 km/h) | 75.84 mph (122.05 km/h) |
| 80 mph (128.75 km/h) | 80.9 mph (130.19 km/h) |
| 85 mph (136.79 km/h) | 85.95 mph (138.33 km/h) |
| 90 mph (144.84 km/h) | 91.01 mph (146.46 km/h) |
| 95 mph (152.89 km/h) | 96.06 mph (154.6 km/h) |
| 100 mph (160.93 km/h) | 101.12 mph (162.74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1953 | 2268 | 2443 | 2551 | 2667 | 2750 | 2842 | 2950 | 3099 | 3249 | 3415 | 3548 | 3789 | 4055 | 4263 | 4396 | 4470 | 4745 | 5127 | 5958 |
Better Fuel Economy Factory Ratios Increased Power
