Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-12 | 145/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.76 (552.8) | 22.13 (562.2) | 0.37 (9.4) 1.7% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 68.37 (1736.67) | 69.54 (1766.2) | 1.16 (29.53) 1.7% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.57 (116) | -0.31 (-8) -6.5% |
| Revolutions per mile (km) | 926.68 (575.81) | 911.19 (566.19) | -15.49 (-9.63) -1.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.34 mph (32.73 km/h) |
| 25 mph (40.23 km/h) | 25.43 mph (40.92 km/h) |
| 30 mph (48.28 km/h) | 30.51 mph (49.1 km/h) |
| 35 mph (56.33 km/h) | 35.6 mph (57.28 km/h) |
| 40 mph (64.37 km/h) | 40.68 mph (65.47 km/h) |
| 45 mph (72.42 km/h) | 45.77 mph (73.65 km/h) |
| 50 mph (80.47 km/h) | 50.85 mph (81.84 km/h) |
| 55 mph (88.51 km/h) | 55.94 mph (90.02 km/h) |
| 60 mph (96.56 km/h) | 61.02 mph (98.2 km/h) |
| 65 mph (104.61 km/h) | 66.11 mph (106.39 km/h) |
| 70 mph (112.65 km/h) | 71.19 mph (114.57 km/h) |
| 75 mph (120.7 km/h) | 76.28 mph (122.75 km/h) |
| 80 mph (128.75 km/h) | 81.36 mph (130.94 km/h) |
| 85 mph (136.79 km/h) | 86.45 mph (139.12 km/h) |
| 90 mph (144.84 km/h) | 91.53 mph (147.3 km/h) |
| 95 mph (152.89 km/h) | 96.62 mph (155.49 km/h) |
| 100 mph (160.93 km/h) | 101.7 mph (163.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2319 | 2694 | 2901 | 3029 | 3167 | 3266 | 3375 | 3503 | 3680 | 3858 | 4055 | 4213 | 4499 | 4815 | 5062 | 5220 | 5309 | 5634 | 6088 | 7075 |
Better Fuel Economy Factory Ratios Increased Power
