Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 21.76 (552.8) | 0.05 (1.3) 0.2% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 68.21 (1732.59) | 68.37 (1736.67) | 0.16 (4.08) 0.2% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.88 (124) | 1.53 (38.75) 45.5% |
| Revolutions per mile (km) | 928.87 (577.17) | 926.68 (575.81) | -2.18 (-1.36) -0.2% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.05 mph (32.26 km/h) |
| 25 mph (40.23 km/h) | 25.06 mph (40.33 km/h) |
| 30 mph (48.28 km/h) | 30.07 mph (48.39 km/h) |
| 35 mph (56.33 km/h) | 35.08 mph (56.46 km/h) |
| 40 mph (64.37 km/h) | 40.09 mph (64.53 km/h) |
| 45 mph (72.42 km/h) | 45.11 mph (72.59 km/h) |
| 50 mph (80.47 km/h) | 50.12 mph (80.66 km/h) |
| 55 mph (88.51 km/h) | 55.13 mph (88.72 km/h) |
| 60 mph (96.56 km/h) | 60.14 mph (96.79 km/h) |
| 65 mph (104.61 km/h) | 65.15 mph (104.85 km/h) |
| 70 mph (112.65 km/h) | 70.17 mph (112.92 km/h) |
| 75 mph (120.7 km/h) | 75.18 mph (120.99 km/h) |
| 80 mph (128.75 km/h) | 80.19 mph (129.05 km/h) |
| 85 mph (136.79 km/h) | 85.2 mph (137.12 km/h) |
| 90 mph (144.84 km/h) | 90.21 mph (145.18 km/h) |
| 95 mph (152.89 km/h) | 95.22 mph (153.25 km/h) |
| 100 mph (160.93 km/h) | 100.24 mph (161.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
