Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/75-17 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.74 (679.3) | 31.91 (810.5) | 5.17 (131.2) 19.3% |
| Width inches (mm) | 6.5 (165) | 10.83 (275) | 4.33 (110) 66.7% |
| Circum. inches (mm) | 84.02 (2134.08) | 100.25 (2546.26) | 16.23 (412.18) 19.3% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.95 (151.25) | 1.08 (27.5) 22.2% |
| Revolutions per mile (km) | 754.11 (468.58) | 632.04 (392.73) | -122.07 (-75.85) -16.2% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.86 mph (38.4 km/h) |
| 25 mph (40.23 km/h) | 29.83 mph (48 km/h) |
| 30 mph (48.28 km/h) | 35.79 mph (57.61 km/h) |
| 35 mph (56.33 km/h) | 41.76 mph (67.21 km/h) |
| 40 mph (64.37 km/h) | 47.73 mph (76.81 km/h) |
| 45 mph (72.42 km/h) | 53.69 mph (86.41 km/h) |
| 50 mph (80.47 km/h) | 59.66 mph (96.01 km/h) |
| 55 mph (88.51 km/h) | 65.62 mph (105.61 km/h) |
| 60 mph (96.56 km/h) | 71.59 mph (115.21 km/h) |
| 65 mph (104.61 km/h) | 77.55 mph (124.81 km/h) |
| 70 mph (112.65 km/h) | 83.52 mph (134.41 km/h) |
| 75 mph (120.7 km/h) | 89.49 mph (144.01 km/h) |
| 80 mph (128.75 km/h) | 95.45 mph (153.61 km/h) |
| 85 mph (136.79 km/h) | 101.42 mph (163.21 km/h) |
| 90 mph (144.84 km/h) | 107.38 mph (172.82 km/h) |
| 95 mph (152.89 km/h) | 113.35 mph (182.42 km/h) |
| 100 mph (160.93 km/h) | 119.31 mph (192.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
Better Fuel Economy Factory Ratios Increased Power
