Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-19 | 385/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.73 (653.6) | 38.19 (970) | 12.46 (316.4) 48.4% |
| Width inches (mm) | 11.22 (285) | 15.16 (385) | 3.94 (100) 35.1% |
| Circum. inches (mm) | 80.84 (2053.34) | 119.97 (3047.34) | 39.13 (994) 48.4% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 9.09 (231) | 5.73 (145.5) 170.2% |
| Revolutions per mile (km) | 783.77 (487.01) | 528.11 (328.15) | -255.65 (-158.86) -32.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.68 mph (47.77 km/h) |
| 25 mph (40.23 km/h) | 37.1 mph (59.71 km/h) |
| 30 mph (48.28 km/h) | 44.52 mph (71.65 km/h) |
| 35 mph (56.33 km/h) | 51.94 mph (83.59 km/h) |
| 40 mph (64.37 km/h) | 59.36 mph (95.54 km/h) |
| 45 mph (72.42 km/h) | 66.78 mph (107.48 km/h) |
| 50 mph (80.47 km/h) | 74.2 mph (119.42 km/h) |
| 55 mph (88.51 km/h) | 81.62 mph (131.36 km/h) |
| 60 mph (96.56 km/h) | 89.05 mph (143.3 km/h) |
| 65 mph (104.61 km/h) | 96.47 mph (155.25 km/h) |
| 70 mph (112.65 km/h) | 103.89 mph (167.19 km/h) |
| 75 mph (120.7 km/h) | 111.31 mph (179.13 km/h) |
| 80 mph (128.75 km/h) | 118.73 mph (191.07 km/h) |
| 85 mph (136.79 km/h) | 126.15 mph (203.02 km/h) |
| 90 mph (144.84 km/h) | 133.57 mph (214.96 km/h) |
| 95 mph (152.89 km/h) | 140.99 mph (226.9 km/h) |
| 100 mph (160.93 km/h) | 148.41 mph (238.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1344 | 1561 | 1681 | 1756 | 1836 | 1893 | 1956 | 2030 | 2133 | 2236 | 2350 | 2442 | 2608 | 2791 | 2934 | 3025 | 3077 | 3266 | 3529 | 4100 |
Better Fuel Economy Factory Ratios Increased Power
