Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 145/90-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 26.28 (667.4) | -4.13 (-104.8) -13.6% |
| Width inches (mm) | 6.89 (175) | 5.71 (145) | -1.18 (-30) -17.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 82.55 (2096.7) | -12.96 (-329.24) -13.6% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.14 (130.5) | -1.06 (-27) -17.1% |
| Revolutions per mile (km) | 663.39 (412.21) | 767.56 (476.94) | 104.17 (64.73) 15.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.29 mph (27.82 km/h) |
| 25 mph (40.23 km/h) | 21.61 mph (34.77 km/h) |
| 30 mph (48.28 km/h) | 25.93 mph (41.73 km/h) |
| 35 mph (56.33 km/h) | 30.25 mph (48.68 km/h) |
| 40 mph (64.37 km/h) | 34.57 mph (55.64 km/h) |
| 45 mph (72.42 km/h) | 38.89 mph (62.59 km/h) |
| 50 mph (80.47 km/h) | 43.21 mph (69.55 km/h) |
| 55 mph (88.51 km/h) | 47.54 mph (76.5 km/h) |
| 60 mph (96.56 km/h) | 51.86 mph (83.46 km/h) |
| 65 mph (104.61 km/h) | 56.18 mph (90.41 km/h) |
| 70 mph (112.65 km/h) | 60.5 mph (97.37 km/h) |
| 75 mph (120.7 km/h) | 64.82 mph (104.32 km/h) |
| 80 mph (128.75 km/h) | 69.14 mph (111.27 km/h) |
| 85 mph (136.79 km/h) | 73.46 mph (118.23 km/h) |
| 90 mph (144.84 km/h) | 77.79 mph (125.18 km/h) |
| 95 mph (152.89 km/h) | 82.11 mph (132.14 km/h) |
| 100 mph (160.93 km/h) | 86.43 mph (139.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1953 | 2269 | 2444 | 2552 | 2668 | 2751 | 2843 | 2951 | 3100 | 3250 | 3416 | 3549 | 3790 | 4056 | 4264 | 4397 | 4472 | 4746 | 5128 | 5960 |
Better Fuel Economy Factory Ratios Increased Power
