Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 155/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 27.76 (705.2) | 0.06 (1.5) 0.2% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 87.04 (2210.74) | 87.22 (2215.45) | 0.19 (4.71) 0.2% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 4.88 (124) | 0.03 (0.75) 0.6% |
| Revolutions per mile (km) | 727.97 (452.34) | 726.42 (451.37) | -1.55 (-0.96) -0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.04 mph (32.26 km/h) |
| 25 mph (40.23 km/h) | 25.05 mph (40.32 km/h) |
| 30 mph (48.28 km/h) | 30.06 mph (48.38 km/h) |
| 35 mph (56.33 km/h) | 35.07 mph (56.45 km/h) |
| 40 mph (64.37 km/h) | 40.09 mph (64.51 km/h) |
| 45 mph (72.42 km/h) | 45.1 mph (72.57 km/h) |
| 50 mph (80.47 km/h) | 50.11 mph (80.64 km/h) |
| 55 mph (88.51 km/h) | 55.12 mph (88.7 km/h) |
| 60 mph (96.56 km/h) | 60.13 mph (96.77 km/h) |
| 65 mph (104.61 km/h) | 65.14 mph (104.83 km/h) |
| 70 mph (112.65 km/h) | 70.15 mph (112.89 km/h) |
| 75 mph (120.7 km/h) | 75.16 mph (120.96 km/h) |
| 80 mph (128.75 km/h) | 80.17 mph (129.02 km/h) |
| 85 mph (136.79 km/h) | 85.18 mph (137.09 km/h) |
| 90 mph (144.84 km/h) | 90.19 mph (145.15 km/h) |
| 95 mph (152.89 km/h) | 95.2 mph (153.21 km/h) |
| 100 mph (160.93 km/h) | 100.21 mph (161.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1849 | 2148 | 2313 | 2415 | 2525 | 2604 | 2690 | 2793 | 2934 | 3076 | 3233 | 3359 | 3587 | 3839 | 4035 | 4161 | 4232 | 4492 | 4854 | 5640 |
Better Fuel Economy Factory Ratios Increased Power
