Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 29.74 (755.5) | 2.89 (73.5) 10.8% |
| Width inches (mm) | 5.71 (145) | 10.83 (275) | 5.12 (130) 89.7% |
| Circum. inches (mm) | 84.35 (2142.57) | 93.44 (2373.47) | 9.09 (230.91) 10.8% |
| Sidewall Height inches (mm) | 3.43 (87) | 4.87 (123.75) | 1.45 (36.75) 42.2% |
| Revolutions per mile (km) | 751.13 (466.73) | 678.05 (421.32) | -73.07 (-45.41) -9.7% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.16 mph (35.66 km/h) |
| 25 mph (40.23 km/h) | 27.69 mph (44.57 km/h) |
| 30 mph (48.28 km/h) | 33.23 mph (53.48 km/h) |
| 35 mph (56.33 km/h) | 38.77 mph (62.4 km/h) |
| 40 mph (64.37 km/h) | 44.31 mph (71.31 km/h) |
| 45 mph (72.42 km/h) | 49.85 mph (80.23 km/h) |
| 50 mph (80.47 km/h) | 55.39 mph (89.14 km/h) |
| 55 mph (88.51 km/h) | 60.93 mph (98.05 km/h) |
| 60 mph (96.56 km/h) | 66.47 mph (106.97 km/h) |
| 65 mph (104.61 km/h) | 72.01 mph (115.88 km/h) |
| 70 mph (112.65 km/h) | 77.54 mph (124.8 km/h) |
| 75 mph (120.7 km/h) | 83.08 mph (133.71 km/h) |
| 80 mph (128.75 km/h) | 88.62 mph (142.62 km/h) |
| 85 mph (136.79 km/h) | 94.16 mph (151.54 km/h) |
| 90 mph (144.84 km/h) | 99.7 mph (160.45 km/h) |
| 95 mph (152.89 km/h) | 105.24 mph (169.36 km/h) |
| 100 mph (160.93 km/h) | 110.78 mph (178.28 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
