Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 275/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 39.49 (1003) | 2.17 (55) 5.8% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 117.25 (2978.23) | 124.06 (3151.02) | 6.8 (172.79) 5.8% |
| Sidewall Height inches (mm) | 8.66 (220) | 9.74 (247.5) | 1.08 (27.5) 12.5% |
| Revolutions per mile (km) | 540.37 (335.77) | 510.74 (317.36) | -29.63 (-18.41) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.16 mph (34.05 km/h) |
| 25 mph (40.23 km/h) | 26.45 mph (42.57 km/h) |
| 30 mph (48.28 km/h) | 31.74 mph (51.08 km/h) |
| 35 mph (56.33 km/h) | 37.03 mph (59.6 km/h) |
| 40 mph (64.37 km/h) | 42.32 mph (68.11 km/h) |
| 45 mph (72.42 km/h) | 47.61 mph (76.62 km/h) |
| 50 mph (80.47 km/h) | 52.9 mph (85.14 km/h) |
| 55 mph (88.51 km/h) | 58.19 mph (93.65 km/h) |
| 60 mph (96.56 km/h) | 63.48 mph (102.16 km/h) |
| 65 mph (104.61 km/h) | 68.77 mph (110.68 km/h) |
| 70 mph (112.65 km/h) | 74.06 mph (119.19 km/h) |
| 75 mph (120.7 km/h) | 79.35 mph (127.7 km/h) |
| 80 mph (128.75 km/h) | 84.64 mph (136.22 km/h) |
| 85 mph (136.79 km/h) | 89.93 mph (144.73 km/h) |
| 90 mph (144.84 km/h) | 95.22 mph (153.24 km/h) |
| 95 mph (152.89 km/h) | 100.51 mph (161.76 km/h) |
| 100 mph (160.93 km/h) | 105.8 mph (170.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1300 | 1510 | 1626 | 1698 | 1775 | 1831 | 1892 | 1963 | 2063 | 2163 | 2273 | 2362 | 2522 | 2699 | 2837 | 2926 | 2976 | 3158 | 3412 | 3966 |
Better Fuel Economy Factory Ratios Increased Power
