Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/85-16 | 280/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.74 (882.4) | 36.74 (933.2) | 2 (50.8) 5.8% |
| Width inches (mm) | 11.02 (280) | 11.02 (280) | 0 (0) 0% |
| Circum. inches (mm) | 109.14 (2772.14) | 115.42 (2931.73) | 6.28 (159.59) 5.8% |
| Sidewall Height inches (mm) | 9.37 (238) | 9.37 (238) | 0 (0) 0% |
| Revolutions per mile (km) | 580.54 (360.73) | 548.94 (341.09) | -31.6 (-19.64) -5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.15 mph (34.04 km/h) |
| 25 mph (40.23 km/h) | 26.44 mph (42.55 km/h) |
| 30 mph (48.28 km/h) | 31.73 mph (51.06 km/h) |
| 35 mph (56.33 km/h) | 37.01 mph (59.57 km/h) |
| 40 mph (64.37 km/h) | 42.3 mph (68.08 km/h) |
| 45 mph (72.42 km/h) | 47.59 mph (76.59 km/h) |
| 50 mph (80.47 km/h) | 52.88 mph (85.1 km/h) |
| 55 mph (88.51 km/h) | 58.17 mph (93.61 km/h) |
| 60 mph (96.56 km/h) | 63.45 mph (102.12 km/h) |
| 65 mph (104.61 km/h) | 68.74 mph (110.63 km/h) |
| 70 mph (112.65 km/h) | 74.03 mph (119.14 km/h) |
| 75 mph (120.7 km/h) | 79.32 mph (127.65 km/h) |
| 80 mph (128.75 km/h) | 84.61 mph (136.16 km/h) |
| 85 mph (136.79 km/h) | 89.89 mph (144.67 km/h) |
| 90 mph (144.84 km/h) | 95.18 mph (153.18 km/h) |
| 95 mph (152.89 km/h) | 100.47 mph (161.69 km/h) |
| 100 mph (160.93 km/h) | 105.76 mph (170.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1397 | 1623 | 1748 | 1825 | 1908 | 1968 | 2033 | 2110 | 2217 | 2324 | 2443 | 2538 | 2711 | 2901 | 3050 | 3145 | 3198 | 3394 | 3668 | 4262 |
Better Fuel Economy Factory Ratios Increased Power
