Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 175/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 29.65 (753) | -0.05 (-1.2) -0.2% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 93.28 (2369.39) | 93.13 (2365.62) | -0.15 (-3.77) -0.2% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4.82 (122.5) | -1.02 (-26) -17.5% |
| Revolutions per mile (km) | 679.22 (422.05) | 680.31 (422.72) | 1.08 (0.67) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.14 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.17 km/h) |
| 30 mph (48.28 km/h) | 29.95 mph (48.2 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.24 km/h) |
| 40 mph (64.37 km/h) | 39.94 mph (64.27 km/h) |
| 45 mph (72.42 km/h) | 44.93 mph (72.31 km/h) |
| 50 mph (80.47 km/h) | 49.92 mph (80.34 km/h) |
| 55 mph (88.51 km/h) | 54.91 mph (88.37 km/h) |
| 60 mph (96.56 km/h) | 59.9 mph (96.41 km/h) |
| 65 mph (104.61 km/h) | 64.9 mph (104.44 km/h) |
| 70 mph (112.65 km/h) | 69.89 mph (112.48 km/h) |
| 75 mph (120.7 km/h) | 74.88 mph (120.51 km/h) |
| 80 mph (128.75 km/h) | 79.87 mph (128.54 km/h) |
| 85 mph (136.79 km/h) | 84.86 mph (136.58 km/h) |
| 90 mph (144.84 km/h) | 89.86 mph (144.61 km/h) |
| 95 mph (152.89 km/h) | 94.85 mph (152.64 km/h) |
| 100 mph (160.93 km/h) | 99.84 mph (160.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1731 | 2011 | 2166 | 2262 | 2365 | 2438 | 2520 | 2615 | 2748 | 2881 | 3028 | 3146 | 3359 | 3595 | 3779 | 3897 | 3963 | 4207 | 4545 | 5282 |
Better Fuel Economy Factory Ratios Increased Power
