Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 340/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 40.08 (1018) | -2.91 (-74) -6.8% |
| Width inches (mm) | 14.37 (365) | 13.39 (340) | -0.98 (-25) -6.8% |
| Circum. inches (mm) | 135.06 (3430.62) | 125.91 (3198.14) | -9.15 (-232.48) -6.8% |
| Sidewall Height inches (mm) | 11.5 (292) | 10.04 (255) | -1.46 (-37) -12.7% |
| Revolutions per mile (km) | 469.11 (291.49) | 503.21 (312.68) | 34.1 (21.19) 7.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.64 mph (30.01 km/h) |
| 25 mph (40.23 km/h) | 23.31 mph (37.51 km/h) |
| 30 mph (48.28 km/h) | 27.97 mph (45.01 km/h) |
| 35 mph (56.33 km/h) | 32.63 mph (52.51 km/h) |
| 40 mph (64.37 km/h) | 37.29 mph (60.01 km/h) |
| 45 mph (72.42 km/h) | 41.95 mph (67.51 km/h) |
| 50 mph (80.47 km/h) | 46.61 mph (75.01 km/h) |
| 55 mph (88.51 km/h) | 51.27 mph (82.52 km/h) |
| 60 mph (96.56 km/h) | 55.93 mph (90.02 km/h) |
| 65 mph (104.61 km/h) | 60.6 mph (97.52 km/h) |
| 70 mph (112.65 km/h) | 65.26 mph (105.02 km/h) |
| 75 mph (120.7 km/h) | 69.92 mph (112.52 km/h) |
| 80 mph (128.75 km/h) | 74.58 mph (120.02 km/h) |
| 85 mph (136.79 km/h) | 79.24 mph (127.52 km/h) |
| 90 mph (144.84 km/h) | 83.9 mph (135.03 km/h) |
| 95 mph (152.89 km/h) | 88.56 mph (142.53 km/h) |
| 100 mph (160.93 km/h) | 93.22 mph (150.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1281 | 1488 | 1602 | 1673 | 1749 | 1804 | 1864 | 1934 | 2033 | 2131 | 2240 | 2327 | 2485 | 2659 | 2795 | 2883 | 2932 | 3112 | 3362 | 3907 |
Better Fuel Economy Factory Ratios Increased Power
