Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 340/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 41.42 (1052) | -1.57 (-40) -3.7% |
| Width inches (mm) | 14.37 (365) | 13.39 (340) | -0.98 (-25) -6.8% |
| Circum. inches (mm) | 135.06 (3430.62) | 130.12 (3304.96) | -4.95 (-125.66) -3.7% |
| Sidewall Height inches (mm) | 11.5 (292) | 10.71 (272) | -0.79 (-20) -6.8% |
| Revolutions per mile (km) | 469.11 (291.49) | 486.95 (302.58) | 17.84 (11.08) 3.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.27 mph (31.01 km/h) |
| 25 mph (40.23 km/h) | 24.08 mph (38.76 km/h) |
| 30 mph (48.28 km/h) | 28.9 mph (46.51 km/h) |
| 35 mph (56.33 km/h) | 33.72 mph (54.26 km/h) |
| 40 mph (64.37 km/h) | 38.53 mph (62.02 km/h) |
| 45 mph (72.42 km/h) | 43.35 mph (69.77 km/h) |
| 50 mph (80.47 km/h) | 48.17 mph (77.52 km/h) |
| 55 mph (88.51 km/h) | 52.99 mph (85.27 km/h) |
| 60 mph (96.56 km/h) | 57.8 mph (93.02 km/h) |
| 65 mph (104.61 km/h) | 62.62 mph (100.78 km/h) |
| 70 mph (112.65 km/h) | 67.44 mph (108.53 km/h) |
| 75 mph (120.7 km/h) | 72.25 mph (116.28 km/h) |
| 80 mph (128.75 km/h) | 77.07 mph (124.03 km/h) |
| 85 mph (136.79 km/h) | 81.89 mph (131.78 km/h) |
| 90 mph (144.84 km/h) | 86.7 mph (139.54 km/h) |
| 95 mph (152.89 km/h) | 91.52 mph (147.29 km/h) |
| 100 mph (160.93 km/h) | 96.34 mph (155.04 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1239 | 1440 | 1550 | 1619 | 1693 | 1745 | 1803 | 1872 | 1967 | 2062 | 2167 | 2252 | 2405 | 2573 | 2705 | 2789 | 2837 | 3011 | 3254 | 3781 |
Better Fuel Economy Factory Ratios Increased Power
