Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 185/50-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 26.28 (667.6) | -0.26 (-6.6) -1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 83.39 (2118.06) | 82.57 (2097.33) | -0.82 (-20.73) -1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 3.64 (92.5) | -0.63 (-16) -14.7% |
| Revolutions per mile (km) | 759.82 (472.13) | 767.33 (476.8) | 7.51 (4.67) 1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.8 mph (31.87 km/h) |
| 25 mph (40.23 km/h) | 24.76 mph (39.84 km/h) |
| 30 mph (48.28 km/h) | 29.71 mph (47.81 km/h) |
| 35 mph (56.33 km/h) | 34.66 mph (55.78 km/h) |
| 40 mph (64.37 km/h) | 39.61 mph (63.74 km/h) |
| 45 mph (72.42 km/h) | 44.56 mph (71.71 km/h) |
| 50 mph (80.47 km/h) | 49.51 mph (79.68 km/h) |
| 55 mph (88.51 km/h) | 54.46 mph (87.65 km/h) |
| 60 mph (96.56 km/h) | 59.41 mph (95.62 km/h) |
| 65 mph (104.61 km/h) | 64.36 mph (103.58 km/h) |
| 70 mph (112.65 km/h) | 69.31 mph (111.55 km/h) |
| 75 mph (120.7 km/h) | 74.27 mph (119.52 km/h) |
| 80 mph (128.75 km/h) | 79.22 mph (127.49 km/h) |
| 85 mph (136.79 km/h) | 84.17 mph (135.46 km/h) |
| 90 mph (144.84 km/h) | 89.12 mph (143.42 km/h) |
| 95 mph (152.89 km/h) | 94.07 mph (151.39 km/h) |
| 100 mph (160.93 km/h) | 99.02 mph (159.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
