Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 145/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 24.99 (634.8) | -4.7 (-119.4) -15.8% |
| Width inches (mm) | 6.5 (165) | 5.71 (145) | -0.79 (-20) -12.1% |
| Circum. inches (mm) | 93.28 (2369.39) | 78.52 (1994.28) | -14.77 (-375.11) -15.8% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4 (101.5) | -1.85 (-47) -31.6% |
| Revolutions per mile (km) | 679.22 (422.05) | 806.98 (501.43) | 127.76 (79.38) 18.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.83 mph (27.09 km/h) |
| 25 mph (40.23 km/h) | 21.04 mph (33.86 km/h) |
| 30 mph (48.28 km/h) | 25.25 mph (40.64 km/h) |
| 35 mph (56.33 km/h) | 29.46 mph (47.41 km/h) |
| 40 mph (64.37 km/h) | 33.67 mph (54.18 km/h) |
| 45 mph (72.42 km/h) | 37.88 mph (60.96 km/h) |
| 50 mph (80.47 km/h) | 42.08 mph (67.73 km/h) |
| 55 mph (88.51 km/h) | 46.29 mph (74.5 km/h) |
| 60 mph (96.56 km/h) | 50.5 mph (81.27 km/h) |
| 65 mph (104.61 km/h) | 54.71 mph (88.05 km/h) |
| 70 mph (112.65 km/h) | 58.92 mph (94.82 km/h) |
| 75 mph (120.7 km/h) | 63.13 mph (101.59 km/h) |
| 80 mph (128.75 km/h) | 67.33 mph (108.37 km/h) |
| 85 mph (136.79 km/h) | 71.54 mph (115.14 km/h) |
| 90 mph (144.84 km/h) | 75.75 mph (121.91 km/h) |
| 95 mph (152.89 km/h) | 79.96 mph (128.68 km/h) |
| 100 mph (160.93 km/h) | 84.17 mph (135.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2054 | 2386 | 2569 | 2683 | 2805 | 2893 | 2989 | 3102 | 3260 | 3417 | 3592 | 3731 | 3985 | 4265 | 4483 | 4623 | 4701 | 4990 | 5392 | 6266 |
Better Fuel Economy Factory Ratios Increased Power
