Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 375/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 40.67 (1033) | -2.32 (-59) -5.4% |
| Width inches (mm) | 14.37 (365) | 14.76 (375) | 0.39 (10) 2.7% |
| Circum. inches (mm) | 135.06 (3430.62) | 127.77 (3245.27) | -7.3 (-185.35) -5.4% |
| Sidewall Height inches (mm) | 11.5 (292) | 10.33 (262.5) | -1.16 (-29.5) -10.1% |
| Revolutions per mile (km) | 469.11 (291.49) | 495.91 (308.14) | 26.79 (16.65) 5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.92 mph (30.45 km/h) |
| 25 mph (40.23 km/h) | 23.65 mph (38.06 km/h) |
| 30 mph (48.28 km/h) | 28.38 mph (45.67 km/h) |
| 35 mph (56.33 km/h) | 33.11 mph (53.28 km/h) |
| 40 mph (64.37 km/h) | 37.84 mph (60.9 km/h) |
| 45 mph (72.42 km/h) | 42.57 mph (68.51 km/h) |
| 50 mph (80.47 km/h) | 47.3 mph (76.12 km/h) |
| 55 mph (88.51 km/h) | 52.03 mph (83.73 km/h) |
| 60 mph (96.56 km/h) | 56.76 mph (91.34 km/h) |
| 65 mph (104.61 km/h) | 61.49 mph (98.96 km/h) |
| 70 mph (112.65 km/h) | 66.22 mph (106.57 km/h) |
| 75 mph (120.7 km/h) | 70.95 mph (114.18 km/h) |
| 80 mph (128.75 km/h) | 75.68 mph (121.79 km/h) |
| 85 mph (136.79 km/h) | 80.41 mph (129.4 km/h) |
| 90 mph (144.84 km/h) | 85.14 mph (137.02 km/h) |
| 95 mph (152.89 km/h) | 89.87 mph (144.63 km/h) |
| 100 mph (160.93 km/h) | 94.6 mph (152.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1262 | 1466 | 1579 | 1649 | 1724 | 1778 | 1837 | 1906 | 2003 | 2100 | 2207 | 2293 | 2449 | 2621 | 2755 | 2841 | 2889 | 3066 | 3313 | 3850 |
Better Fuel Economy Factory Ratios Increased Power
