Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/85-16 | 280/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.74 (882.4) | 38.74 (984) | 4 (101.6) 11.5% |
| Width inches (mm) | 11.02 (280) | 11.02 (280) | 0 (0) 0% |
| Circum. inches (mm) | 109.14 (2772.14) | 121.71 (3091.33) | 12.57 (319.19) 11.5% |
| Sidewall Height inches (mm) | 9.37 (238) | 9.37 (238) | 0 (0) 0% |
| Revolutions per mile (km) | 580.54 (360.73) | 520.6 (323.49) | -59.94 (-37.25) -10.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.3 mph (35.89 km/h) |
| 25 mph (40.23 km/h) | 27.88 mph (44.87 km/h) |
| 30 mph (48.28 km/h) | 33.45 mph (53.84 km/h) |
| 35 mph (56.33 km/h) | 39.03 mph (62.81 km/h) |
| 40 mph (64.37 km/h) | 44.61 mph (71.79 km/h) |
| 45 mph (72.42 km/h) | 50.18 mph (80.76 km/h) |
| 50 mph (80.47 km/h) | 55.76 mph (89.73 km/h) |
| 55 mph (88.51 km/h) | 61.33 mph (98.71 km/h) |
| 60 mph (96.56 km/h) | 66.91 mph (107.68 km/h) |
| 65 mph (104.61 km/h) | 72.48 mph (116.65 km/h) |
| 70 mph (112.65 km/h) | 78.06 mph (125.63 km/h) |
| 75 mph (120.7 km/h) | 83.64 mph (134.6 km/h) |
| 80 mph (128.75 km/h) | 89.21 mph (143.57 km/h) |
| 85 mph (136.79 km/h) | 94.79 mph (152.55 km/h) |
| 90 mph (144.84 km/h) | 100.36 mph (161.52 km/h) |
| 95 mph (152.89 km/h) | 105.94 mph (170.49 km/h) |
| 100 mph (160.93 km/h) | 111.51 mph (179.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1325 | 1539 | 1657 | 1731 | 1810 | 1866 | 1928 | 2001 | 2103 | 2204 | 2317 | 2407 | 2571 | 2751 | 2892 | 2982 | 3033 | 3219 | 3478 | 4042 |
Better Fuel Economy Factory Ratios Increased Power
