Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 145/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 28.28 (718.2) | -1.42 (-36) -4.8% |
| Width inches (mm) | 6.5 (165) | 5.71 (145) | -0.79 (-20) -12.1% |
| Circum. inches (mm) | 93.28 (2369.39) | 88.83 (2256.29) | -4.45 (-113.1) -4.8% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 5.14 (130.5) | -0.71 (-18) -12.1% |
| Revolutions per mile (km) | 679.22 (422.05) | 713.27 (443.2) | 34.05 (21.16) 5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.05 mph (30.65 km/h) |
| 25 mph (40.23 km/h) | 23.81 mph (38.31 km/h) |
| 30 mph (48.28 km/h) | 28.57 mph (45.98 km/h) |
| 35 mph (56.33 km/h) | 33.33 mph (53.64 km/h) |
| 40 mph (64.37 km/h) | 38.09 mph (61.3 km/h) |
| 45 mph (72.42 km/h) | 42.85 mph (68.96 km/h) |
| 50 mph (80.47 km/h) | 47.61 mph (76.63 km/h) |
| 55 mph (88.51 km/h) | 52.37 mph (84.29 km/h) |
| 60 mph (96.56 km/h) | 57.14 mph (91.95 km/h) |
| 65 mph (104.61 km/h) | 61.9 mph (99.61 km/h) |
| 70 mph (112.65 km/h) | 66.66 mph (107.28 km/h) |
| 75 mph (120.7 km/h) | 71.42 mph (114.94 km/h) |
| 80 mph (128.75 km/h) | 76.18 mph (122.6 km/h) |
| 85 mph (136.79 km/h) | 80.94 mph (130.26 km/h) |
| 90 mph (144.84 km/h) | 85.7 mph (137.93 km/h) |
| 95 mph (152.89 km/h) | 90.47 mph (145.59 km/h) |
| 100 mph (160.93 km/h) | 95.23 mph (153.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1815 | 2109 | 2271 | 2371 | 2479 | 2557 | 2642 | 2742 | 2881 | 3020 | 3175 | 3298 | 3522 | 3769 | 3962 | 4086 | 4155 | 4410 | 4766 | 5538 |
Better Fuel Economy Factory Ratios Increased Power
