Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 165/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 29.69 (754.2) | 3.7 (94) 14.2% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 81.66 (2074.08) | 93.28 (2369.39) | 11.63 (295.31) 14.2% |
| Sidewall Height inches (mm) | 4 (101.5) | 5.85 (148.5) | 1.85 (47) 46.3% |
| Revolutions per mile (km) | 775.93 (482.14) | 679.22 (422.05) | -96.71 (-60.09) -12.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.85 mph (36.77 km/h) |
| 25 mph (40.23 km/h) | 28.56 mph (45.96 km/h) |
| 30 mph (48.28 km/h) | 34.27 mph (55.15 km/h) |
| 35 mph (56.33 km/h) | 39.98 mph (64.35 km/h) |
| 40 mph (64.37 km/h) | 45.7 mph (73.54 km/h) |
| 45 mph (72.42 km/h) | 51.41 mph (82.73 km/h) |
| 50 mph (80.47 km/h) | 57.12 mph (91.92 km/h) |
| 55 mph (88.51 km/h) | 62.83 mph (101.12 km/h) |
| 60 mph (96.56 km/h) | 68.54 mph (110.31 km/h) |
| 65 mph (104.61 km/h) | 74.25 mph (119.5 km/h) |
| 70 mph (112.65 km/h) | 79.97 mph (128.69 km/h) |
| 75 mph (120.7 km/h) | 85.68 mph (137.89 km/h) |
| 80 mph (128.75 km/h) | 91.39 mph (147.08 km/h) |
| 85 mph (136.79 km/h) | 97.1 mph (156.27 km/h) |
| 90 mph (144.84 km/h) | 102.81 mph (165.46 km/h) |
| 95 mph (152.89 km/h) | 108.53 mph (174.66 km/h) |
| 100 mph (160.93 km/h) | 114.24 mph (183.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1728 | 2008 | 2162 | 2258 | 2361 | 2435 | 2516 | 2611 | 2744 | 2876 | 3023 | 3141 | 3354 | 3589 | 3773 | 3891 | 3957 | 4200 | 4538 | 5274 |
Better Fuel Economy Factory Ratios Increased Power
