Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 155/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 27.76 (705.2) | -1.22 (-31) -4.2% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 91.06 (2312.84) | 87.22 (2215.45) | -3.83 (-97.39) -4.2% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 4.88 (124) | -0.61 (-15.5) -11.1% |
| Revolutions per mile (km) | 695.83 (432.37) | 726.42 (451.37) | 30.59 (19.01) 4.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.16 mph (30.83 km/h) |
| 25 mph (40.23 km/h) | 23.95 mph (38.54 km/h) |
| 30 mph (48.28 km/h) | 28.74 mph (46.25 km/h) |
| 35 mph (56.33 km/h) | 33.53 mph (53.96 km/h) |
| 40 mph (64.37 km/h) | 38.32 mph (61.66 km/h) |
| 45 mph (72.42 km/h) | 43.11 mph (69.37 km/h) |
| 50 mph (80.47 km/h) | 47.89 mph (77.08 km/h) |
| 55 mph (88.51 km/h) | 52.68 mph (84.79 km/h) |
| 60 mph (96.56 km/h) | 57.47 mph (92.49 km/h) |
| 65 mph (104.61 km/h) | 62.26 mph (100.2 km/h) |
| 70 mph (112.65 km/h) | 67.05 mph (107.91 km/h) |
| 75 mph (120.7 km/h) | 71.84 mph (115.62 km/h) |
| 80 mph (128.75 km/h) | 76.63 mph (123.33 km/h) |
| 85 mph (136.79 km/h) | 81.42 mph (131.03 km/h) |
| 90 mph (144.84 km/h) | 86.21 mph (138.74 km/h) |
| 95 mph (152.89 km/h) | 91 mph (146.45 km/h) |
| 100 mph (160.93 km/h) | 95.79 mph (154.16 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
