Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 265/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 30.43 (773) | 0.03 (0.8) 0.1% |
| Width inches (mm) | 6.89 (175) | 10.43 (265) | 3.54 (90) 51.4% |
| Circum. inches (mm) | 95.51 (2425.94) | 95.61 (2428.45) | 0.1 (2.51) 0.1% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.22 (132.5) | -0.98 (-25) -15.9% |
| Revolutions per mile (km) | 663.39 (412.21) | 662.7 (411.78) | -0.69 (-0.43) -0.1% |
265/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.02 mph (32.22 km/h) |
| 25 mph (40.23 km/h) | 25.03 mph (40.28 km/h) |
| 30 mph (48.28 km/h) | 30.03 mph (48.33 km/h) |
| 35 mph (56.33 km/h) | 35.04 mph (56.39 km/h) |
| 40 mph (64.37 km/h) | 40.04 mph (64.44 km/h) |
| 45 mph (72.42 km/h) | 45.05 mph (72.5 km/h) |
| 50 mph (80.47 km/h) | 50.05 mph (80.55 km/h) |
| 55 mph (88.51 km/h) | 55.06 mph (88.61 km/h) |
| 60 mph (96.56 km/h) | 60.06 mph (96.66 km/h) |
| 65 mph (104.61 km/h) | 65.07 mph (104.72 km/h) |
| 70 mph (112.65 km/h) | 70.07 mph (112.77 km/h) |
| 75 mph (120.7 km/h) | 75.08 mph (120.83 km/h) |
| 80 mph (128.75 km/h) | 80.08 mph (128.88 km/h) |
| 85 mph (136.79 km/h) | 85.09 mph (136.94 km/h) |
| 90 mph (144.84 km/h) | 90.09 mph (144.99 km/h) |
| 95 mph (152.89 km/h) | 95.1 mph (153.05 km/h) |
| 100 mph (160.93 km/h) | 100.1 mph (161.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1686 | 1959 | 2110 | 2203 | 2304 | 2375 | 2454 | 2548 | 2677 | 2806 | 2950 | 3064 | 3272 | 3502 | 3681 | 3796 | 3861 | 4098 | 4428 | 5145 |
Better Fuel Economy Factory Ratios Increased Power
