Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-14 | 278/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.76 (603.6) | 33.13 (841.6) | 9.37 (238) 39.4% |
| Width inches (mm) | 6.1 (155) | 10.94 (278) | 4.84 (123) 79.4% |
| Circum. inches (mm) | 74.66 (1896.27) | 104.09 (2643.96) | 29.44 (747.7) 39.4% |
| Sidewall Height inches (mm) | 4.88 (124) | 6.57 (166.8) | 1.69 (42.8) 34.5% |
| Revolutions per mile (km) | 848.69 (527.35) | 608.69 (378.22) | -240.01 (-149.13) -28.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.89 mph (44.88 km/h) |
| 25 mph (40.23 km/h) | 34.86 mph (56.1 km/h) |
| 30 mph (48.28 km/h) | 41.83 mph (67.32 km/h) |
| 35 mph (56.33 km/h) | 48.8 mph (78.54 km/h) |
| 40 mph (64.37 km/h) | 55.77 mph (89.76 km/h) |
| 45 mph (72.42 km/h) | 62.74 mph (100.98 km/h) |
| 50 mph (80.47 km/h) | 69.72 mph (112.2 km/h) |
| 55 mph (88.51 km/h) | 76.69 mph (123.42 km/h) |
| 60 mph (96.56 km/h) | 83.66 mph (134.63 km/h) |
| 65 mph (104.61 km/h) | 90.63 mph (145.85 km/h) |
| 70 mph (112.65 km/h) | 97.6 mph (157.07 km/h) |
| 75 mph (120.7 km/h) | 104.57 mph (168.29 km/h) |
| 80 mph (128.75 km/h) | 111.54 mph (179.51 km/h) |
| 85 mph (136.79 km/h) | 118.52 mph (190.73 km/h) |
| 90 mph (144.84 km/h) | 125.49 mph (201.95 km/h) |
| 95 mph (152.89 km/h) | 132.46 mph (213.17 km/h) |
| 100 mph (160.93 km/h) | 139.43 mph (224.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1549 | 1799 | 1938 | 2024 | 2116 | 2182 | 2254 | 2340 | 2459 | 2577 | 2709 | 2815 | 3006 | 3217 | 3381 | 3487 | 3546 | 3764 | 4067 | 4726 |
Better Fuel Economy Factory Ratios Increased Power
