Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 275/49-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 30.61 (777.5) | 4.07 (103.3) 15.3% |
| Width inches (mm) | 6.1 (155) | 10.83 (275) | 4.72 (120) 77.4% |
| Circum. inches (mm) | 83.39 (2118.06) | 96.16 (2442.59) | 12.78 (324.53) 15.3% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.31 (134.75) | 1.03 (26.25) 24.2% |
| Revolutions per mile (km) | 759.82 (472.13) | 658.87 (409.4) | -100.95 (-62.73) -13.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.06 mph (37.12 km/h) |
| 25 mph (40.23 km/h) | 28.83 mph (46.4 km/h) |
| 30 mph (48.28 km/h) | 34.6 mph (55.68 km/h) |
| 35 mph (56.33 km/h) | 40.36 mph (64.96 km/h) |
| 40 mph (64.37 km/h) | 46.13 mph (74.24 km/h) |
| 45 mph (72.42 km/h) | 51.89 mph (83.52 km/h) |
| 50 mph (80.47 km/h) | 57.66 mph (92.8 km/h) |
| 55 mph (88.51 km/h) | 63.43 mph (102.08 km/h) |
| 60 mph (96.56 km/h) | 69.19 mph (111.36 km/h) |
| 65 mph (104.61 km/h) | 74.96 mph (120.64 km/h) |
| 70 mph (112.65 km/h) | 80.73 mph (129.92 km/h) |
| 75 mph (120.7 km/h) | 86.49 mph (139.19 km/h) |
| 80 mph (128.75 km/h) | 92.26 mph (148.47 km/h) |
| 85 mph (136.79 km/h) | 98.02 mph (157.75 km/h) |
| 90 mph (144.84 km/h) | 103.79 mph (167.03 km/h) |
| 95 mph (152.89 km/h) | 109.56 mph (176.31 km/h) |
| 100 mph (160.93 km/h) | 115.32 mph (185.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1677 | 1948 | 2098 | 2190 | 2290 | 2362 | 2440 | 2533 | 2661 | 2790 | 2932 | 3047 | 3253 | 3482 | 3660 | 3774 | 3839 | 4074 | 4402 | 5116 |
Better Fuel Economy Factory Ratios Increased Power
