Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 265/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 29.39 (746.5) | -0.26 (-6.5) -0.9% |
| Width inches (mm) | 9.65 (245) | 10.43 (265) | 0.79 (20) 8.2% |
| Circum. inches (mm) | 93.13 (2365.62) | 92.33 (2345.2) | -0.8 (-20.42) -0.9% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.69 (119.25) | -0.13 (-3.25) -2.7% |
| Revolutions per mile (km) | 680.31 (422.72) | 686.23 (426.4) | 5.92 (3.68) 0.9% |
265/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.83 mph (31.91 km/h) |
| 25 mph (40.23 km/h) | 24.78 mph (39.89 km/h) |
| 30 mph (48.28 km/h) | 29.74 mph (47.86 km/h) |
| 35 mph (56.33 km/h) | 34.7 mph (55.84 km/h) |
| 40 mph (64.37 km/h) | 39.65 mph (63.82 km/h) |
| 45 mph (72.42 km/h) | 44.61 mph (71.8 km/h) |
| 50 mph (80.47 km/h) | 49.57 mph (79.77 km/h) |
| 55 mph (88.51 km/h) | 54.53 mph (87.75 km/h) |
| 60 mph (96.56 km/h) | 59.48 mph (95.73 km/h) |
| 65 mph (104.61 km/h) | 64.44 mph (103.7 km/h) |
| 70 mph (112.65 km/h) | 69.4 mph (111.68 km/h) |
| 75 mph (120.7 km/h) | 74.35 mph (119.66 km/h) |
| 80 mph (128.75 km/h) | 79.31 mph (127.64 km/h) |
| 85 mph (136.79 km/h) | 84.27 mph (135.61 km/h) |
| 90 mph (144.84 km/h) | 89.22 mph (143.59 km/h) |
| 95 mph (152.89 km/h) | 94.18 mph (151.57 km/h) |
| 100 mph (160.93 km/h) | 99.14 mph (159.55 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
