Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.04 (737.5) | 29.74 (755.5) | 0.71 (18) 2.4% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 91.22 (2316.92) | 93.44 (2373.47) | 2.23 (56.55) 2.4% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 4.87 (123.75) | 0.35 (9) 7.8% |
| Revolutions per mile (km) | 694.6 (431.61) | 678.05 (421.32) | -16.55 (-10.28) -2.4% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.49 mph (32.97 km/h) |
| 25 mph (40.23 km/h) | 25.61 mph (41.22 km/h) |
| 30 mph (48.28 km/h) | 30.73 mph (49.46 km/h) |
| 35 mph (56.33 km/h) | 35.85 mph (57.7 km/h) |
| 40 mph (64.37 km/h) | 40.98 mph (65.95 km/h) |
| 45 mph (72.42 km/h) | 46.1 mph (74.19 km/h) |
| 50 mph (80.47 km/h) | 51.22 mph (82.43 km/h) |
| 55 mph (88.51 km/h) | 56.34 mph (90.67 km/h) |
| 60 mph (96.56 km/h) | 61.46 mph (98.92 km/h) |
| 65 mph (104.61 km/h) | 66.59 mph (107.16 km/h) |
| 70 mph (112.65 km/h) | 71.71 mph (115.4 km/h) |
| 75 mph (120.7 km/h) | 76.83 mph (123.65 km/h) |
| 80 mph (128.75 km/h) | 81.95 mph (131.89 km/h) |
| 85 mph (136.79 km/h) | 87.07 mph (140.13 km/h) |
| 90 mph (144.84 km/h) | 92.2 mph (148.38 km/h) |
| 95 mph (152.89 km/h) | 97.32 mph (156.62 km/h) |
| 100 mph (160.93 km/h) | 102.44 mph (164.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
