Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/85-16 | 235/80-19.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.74 (882.4) | 34.3 (871.3) | -0.44 (-11.1) -1.3% |
| Width inches (mm) | 11.02 (280) | 9.25 (235) | -1.77 (-45) -16.1% |
| Circum. inches (mm) | 109.14 (2772.14) | 107.77 (2737.27) | -1.37 (-34.87) -1.3% |
| Sidewall Height inches (mm) | 9.37 (238) | 7.4 (188) | -1.97 (-50) -21% |
| Revolutions per mile (km) | 580.54 (360.73) | 587.94 (365.33) | 7.4 (4.6) 1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.75 mph (31.78 km/h) |
| 25 mph (40.23 km/h) | 24.69 mph (39.73 km/h) |
| 30 mph (48.28 km/h) | 29.62 mph (47.67 km/h) |
| 35 mph (56.33 km/h) | 34.56 mph (55.62 km/h) |
| 40 mph (64.37 km/h) | 39.5 mph (63.56 km/h) |
| 45 mph (72.42 km/h) | 44.43 mph (71.51 km/h) |
| 50 mph (80.47 km/h) | 49.37 mph (79.46 km/h) |
| 55 mph (88.51 km/h) | 54.31 mph (87.4 km/h) |
| 60 mph (96.56 km/h) | 59.25 mph (95.35 km/h) |
| 65 mph (104.61 km/h) | 64.18 mph (103.29 km/h) |
| 70 mph (112.65 km/h) | 69.12 mph (111.24 km/h) |
| 75 mph (120.7 km/h) | 74.06 mph (119.18 km/h) |
| 80 mph (128.75 km/h) | 78.99 mph (127.13 km/h) |
| 85 mph (136.79 km/h) | 83.93 mph (135.07 km/h) |
| 90 mph (144.84 km/h) | 88.87 mph (143.02 km/h) |
| 95 mph (152.89 km/h) | 93.8 mph (150.96 km/h) |
| 100 mph (160.93 km/h) | 98.74 mph (158.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1496 | 1738 | 1872 | 1955 | 2044 | 2107 | 2177 | 2260 | 2375 | 2489 | 2617 | 2719 | 2903 | 3107 | 3266 | 3368 | 3425 | 3635 | 3928 | 4565 |
Better Fuel Economy Factory Ratios Increased Power
