Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 150/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 24.5 (622.2) | -3.43 (-87) -12.3% |
| Width inches (mm) | 7.09 (180) | 5.91 (150) | -1.18 (-30) -16.7% |
| Circum. inches (mm) | 87.72 (2228.02) | 76.96 (1954.7) | -10.76 (-273.32) -12.3% |
| Sidewall Height inches (mm) | 4.96 (126) | 3.25 (82.5) | -1.71 (-43.5) -34.5% |
| Revolutions per mile (km) | 722.32 (448.83) | 823.32 (511.59) | 101 (62.76) 14% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.55 mph (28.24 km/h) |
| 25 mph (40.23 km/h) | 21.93 mph (35.3 km/h) |
| 30 mph (48.28 km/h) | 26.32 mph (42.36 km/h) |
| 35 mph (56.33 km/h) | 30.71 mph (49.42 km/h) |
| 40 mph (64.37 km/h) | 35.09 mph (56.48 km/h) |
| 45 mph (72.42 km/h) | 39.48 mph (63.54 km/h) |
| 50 mph (80.47 km/h) | 43.87 mph (70.6 km/h) |
| 55 mph (88.51 km/h) | 48.25 mph (77.66 km/h) |
| 60 mph (96.56 km/h) | 52.64 mph (84.72 km/h) |
| 65 mph (104.61 km/h) | 57.03 mph (91.77 km/h) |
| 70 mph (112.65 km/h) | 61.41 mph (98.83 km/h) |
| 75 mph (120.7 km/h) | 65.8 mph (105.89 km/h) |
| 80 mph (128.75 km/h) | 70.19 mph (112.95 km/h) |
| 85 mph (136.79 km/h) | 74.57 mph (120.01 km/h) |
| 90 mph (144.84 km/h) | 78.96 mph (127.07 km/h) |
| 95 mph (152.89 km/h) | 83.35 mph (134.13 km/h) |
| 100 mph (160.93 km/h) | 87.73 mph (141.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2095 | 2434 | 2621 | 2737 | 2862 | 2951 | 3049 | 3165 | 3326 | 3486 | 3664 | 3807 | 4066 | 4351 | 4574 | 4716 | 4797 | 5091 | 5501 | 6393 |
Better Fuel Economy Factory Ratios Increased Power
