Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 200/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 26.66 (677.2) | 1.74 (44.2) 7% |
| Width inches (mm) | 7.09 (180) | 7.87 (200) | 0.79 (20) 11.1% |
| Circum. inches (mm) | 78.29 (1988.63) | 83.76 (2127.49) | 5.47 (138.86) 7% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.33 (110) | -0.63 (-16) -12.7% |
| Revolutions per mile (km) | 809.27 (502.86) | 756.45 (470.04) | -52.82 (-32.82) -6.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.4 mph (34.43 km/h) |
| 25 mph (40.23 km/h) | 26.75 mph (43.04 km/h) |
| 30 mph (48.28 km/h) | 32.09 mph (51.65 km/h) |
| 35 mph (56.33 km/h) | 37.44 mph (60.26 km/h) |
| 40 mph (64.37 km/h) | 42.79 mph (68.87 km/h) |
| 45 mph (72.42 km/h) | 48.14 mph (77.48 km/h) |
| 50 mph (80.47 km/h) | 53.49 mph (86.09 km/h) |
| 55 mph (88.51 km/h) | 58.84 mph (94.69 km/h) |
| 60 mph (96.56 km/h) | 64.19 mph (103.3 km/h) |
| 65 mph (104.61 km/h) | 69.54 mph (111.91 km/h) |
| 70 mph (112.65 km/h) | 74.89 mph (120.52 km/h) |
| 75 mph (120.7 km/h) | 80.24 mph (129.13 km/h) |
| 80 mph (128.75 km/h) | 85.59 mph (137.74 km/h) |
| 85 mph (136.79 km/h) | 90.94 mph (146.35 km/h) |
| 90 mph (144.84 km/h) | 96.28 mph (154.95 km/h) |
| 95 mph (152.89 km/h) | 101.63 mph (163.56 km/h) |
| 100 mph (160.93 km/h) | 106.98 mph (172.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1925 | 2236 | 2408 | 2515 | 2630 | 2711 | 2802 | 2908 | 3055 | 3203 | 3367 | 3498 | 3735 | 3998 | 4202 | 4333 | 4407 | 4677 | 5054 | 5873 |
Better Fuel Economy Factory Ratios Increased Power
