Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.1 (764.5) | 29.74 (755.5) | -0.35 (-9) -1.2% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 94.56 (2401.75) | 93.44 (2373.47) | -1.11 (-28.27) -1.2% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 4.87 (123.75) | -0.18 (-4.5) -3.5% |
| Revolutions per mile (km) | 670.07 (416.36) | 678.05 (421.32) | 7.98 (4.96) 1.2% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.76 mph (31.81 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.76 km/h) |
| 30 mph (48.28 km/h) | 29.65 mph (47.71 km/h) |
| 35 mph (56.33 km/h) | 34.59 mph (55.66 km/h) |
| 40 mph (64.37 km/h) | 39.53 mph (63.62 km/h) |
| 45 mph (72.42 km/h) | 44.47 mph (71.57 km/h) |
| 50 mph (80.47 km/h) | 49.41 mph (79.52 km/h) |
| 55 mph (88.51 km/h) | 54.35 mph (87.47 km/h) |
| 60 mph (96.56 km/h) | 59.29 mph (95.42 km/h) |
| 65 mph (104.61 km/h) | 64.23 mph (103.38 km/h) |
| 70 mph (112.65 km/h) | 69.18 mph (111.33 km/h) |
| 75 mph (120.7 km/h) | 74.12 mph (119.28 km/h) |
| 80 mph (128.75 km/h) | 79.06 mph (127.23 km/h) |
| 85 mph (136.79 km/h) | 84 mph (135.18 km/h) |
| 90 mph (144.84 km/h) | 88.94 mph (143.14 km/h) |
| 95 mph (152.89 km/h) | 93.88 mph (151.09 km/h) |
| 100 mph (160.93 km/h) | 98.82 mph (159.04 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1726 | 2005 | 2159 | 2254 | 2357 | 2430 | 2511 | 2607 | 2739 | 2871 | 3018 | 3135 | 3348 | 3583 | 3767 | 3884 | 3950 | 4193 | 4530 | 5265 |
Better Fuel Economy Factory Ratios Increased Power
