Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-17 | 300/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.82 (655.8) | 41.26 (1048) | 15.44 (392.2) 59.8% |
| Width inches (mm) | 5.51 (140) | 11.81 (300) | 6.3 (160) 114.3% |
| Circum. inches (mm) | 81.11 (2060.26) | 129.62 (3292.39) | 48.51 (1232.13) 59.8% |
| Sidewall Height inches (mm) | 4.41 (112) | 10.63 (270) | 6.22 (158) 141.1% |
| Revolutions per mile (km) | 781.14 (485.38) | 488.81 (303.73) | -292.33 (-181.65) -37.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 31.96 mph (51.44 km/h) |
| 25 mph (40.23 km/h) | 39.95 mph (64.3 km/h) |
| 30 mph (48.28 km/h) | 47.94 mph (77.15 km/h) |
| 35 mph (56.33 km/h) | 55.93 mph (90.01 km/h) |
| 40 mph (64.37 km/h) | 63.92 mph (102.87 km/h) |
| 45 mph (72.42 km/h) | 71.91 mph (115.73 km/h) |
| 50 mph (80.47 km/h) | 79.9 mph (128.59 km/h) |
| 55 mph (88.51 km/h) | 87.89 mph (141.45 km/h) |
| 60 mph (96.56 km/h) | 95.88 mph (154.31 km/h) |
| 65 mph (104.61 km/h) | 103.87 mph (167.17 km/h) |
| 70 mph (112.65 km/h) | 111.86 mph (180.03 km/h) |
| 75 mph (120.7 km/h) | 119.85 mph (192.89 km/h) |
| 80 mph (128.75 km/h) | 127.84 mph (205.75 km/h) |
| 85 mph (136.79 km/h) | 135.83 mph (218.6 km/h) |
| 90 mph (144.84 km/h) | 143.82 mph (231.46 km/h) |
| 95 mph (152.89 km/h) | 151.81 mph (244.32 km/h) |
| 100 mph (160.93 km/h) | 159.8 mph (257.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1244 | 1445 | 1556 | 1625 | 1699 | 1752 | 1810 | 1879 | 1974 | 2070 | 2176 | 2260 | 2414 | 2583 | 2715 | 2800 | 2848 | 3022 | 3266 | 3795 |
Better Fuel Economy Factory Ratios Increased Power
