Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/40-20 | 265/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.35 (720) | 29.39 (746.5) | 1.04 (26.5) 3.7% |
| Width inches (mm) | 10.43 (265) | 10.43 (265) | 0 (0) 0% |
| Circum. inches (mm) | 89.05 (2261.95) | 92.33 (2345.2) | 3.28 (83.25) 3.7% |
| Sidewall Height inches (mm) | 4.17 (106) | 4.69 (119.25) | 0.52 (13.25) 12.5% |
| Revolutions per mile (km) | 711.49 (442.1) | 686.23 (426.4) | -25.26 (-15.69) -3.5% |
265/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.37 km/h) |
| 25 mph (40.23 km/h) | 25.92 mph (41.71 km/h) |
| 30 mph (48.28 km/h) | 31.1 mph (50.06 km/h) |
| 35 mph (56.33 km/h) | 36.29 mph (58.4 km/h) |
| 40 mph (64.37 km/h) | 41.47 mph (66.74 km/h) |
| 45 mph (72.42 km/h) | 46.66 mph (75.09 km/h) |
| 50 mph (80.47 km/h) | 51.84 mph (83.43 km/h) |
| 55 mph (88.51 km/h) | 57.02 mph (91.77 km/h) |
| 60 mph (96.56 km/h) | 62.21 mph (100.11 km/h) |
| 65 mph (104.61 km/h) | 67.39 mph (108.46 km/h) |
| 70 mph (112.65 km/h) | 72.58 mph (116.8 km/h) |
| 75 mph (120.7 km/h) | 77.76 mph (125.14 km/h) |
| 80 mph (128.75 km/h) | 82.94 mph (133.49 km/h) |
| 85 mph (136.79 km/h) | 88.13 mph (141.83 km/h) |
| 90 mph (144.84 km/h) | 93.31 mph (150.17 km/h) |
| 95 mph (152.89 km/h) | 98.5 mph (158.52 km/h) |
| 100 mph (160.93 km/h) | 103.68 mph (166.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1746 | 2029 | 2185 | 2281 | 2385 | 2460 | 2541 | 2638 | 2772 | 2906 | 3054 | 3173 | 3389 | 3626 | 3812 | 3931 | 3998 | 4243 | 4585 | 5328 |
Better Fuel Economy Factory Ratios Increased Power
