Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-20 | 265/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.81 (782.5) | 29.39 (746.5) | -1.42 (-36) -4.6% |
| Width inches (mm) | 12.01 (305) | 10.43 (265) | -1.57 (-40) -13.1% |
| Circum. inches (mm) | 96.78 (2458.3) | 92.33 (2345.2) | -4.45 (-113.1) -4.6% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 4.69 (119.25) | -0.71 (-18) -13.1% |
| Revolutions per mile (km) | 654.66 (406.79) | 686.23 (426.4) | 31.57 (19.62) 4.8% |
265/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.71 km/h) |
| 25 mph (40.23 km/h) | 23.85 mph (38.38 km/h) |
| 30 mph (48.28 km/h) | 28.62 mph (46.06 km/h) |
| 35 mph (56.33 km/h) | 33.39 mph (53.74 km/h) |
| 40 mph (64.37 km/h) | 38.16 mph (61.41 km/h) |
| 45 mph (72.42 km/h) | 42.93 mph (69.09 km/h) |
| 50 mph (80.47 km/h) | 47.7 mph (76.77 km/h) |
| 55 mph (88.51 km/h) | 52.47 mph (84.44 km/h) |
| 60 mph (96.56 km/h) | 57.24 mph (92.12 km/h) |
| 65 mph (104.61 km/h) | 62.01 mph (99.79 km/h) |
| 70 mph (112.65 km/h) | 66.78 mph (107.47 km/h) |
| 75 mph (120.7 km/h) | 71.55 mph (115.15 km/h) |
| 80 mph (128.75 km/h) | 76.32 mph (122.82 km/h) |
| 85 mph (136.79 km/h) | 81.09 mph (130.5 km/h) |
| 90 mph (144.84 km/h) | 85.86 mph (138.18 km/h) |
| 95 mph (152.89 km/h) | 90.63 mph (145.85 km/h) |
| 100 mph (160.93 km/h) | 95.4 mph (153.53 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
