Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-12 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.99 (507.8) | 21.76 (552.8) | 1.77 (45) 8.9% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 62.81 (1595.3) | 68.37 (1736.67) | 5.57 (141.37) 8.9% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.88 (124) | 0.89 (22.5) 22.2% |
| Revolutions per mile (km) | 1008.8 (626.84) | 926.68 (575.81) | -82.12 (-51.03) -8.1% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.77 mph (35.04 km/h) |
| 25 mph (40.23 km/h) | 27.22 mph (43.8 km/h) |
| 30 mph (48.28 km/h) | 32.66 mph (52.56 km/h) |
| 35 mph (56.33 km/h) | 38.1 mph (61.32 km/h) |
| 40 mph (64.37 km/h) | 43.54 mph (70.08 km/h) |
| 45 mph (72.42 km/h) | 48.99 mph (78.84 km/h) |
| 50 mph (80.47 km/h) | 54.43 mph (87.6 km/h) |
| 55 mph (88.51 km/h) | 59.87 mph (96.36 km/h) |
| 60 mph (96.56 km/h) | 65.32 mph (105.12 km/h) |
| 65 mph (104.61 km/h) | 70.76 mph (113.88 km/h) |
| 70 mph (112.65 km/h) | 76.2 mph (122.64 km/h) |
| 75 mph (120.7 km/h) | 81.65 mph (131.4 km/h) |
| 80 mph (128.75 km/h) | 87.09 mph (140.16 km/h) |
| 85 mph (136.79 km/h) | 92.53 mph (148.92 km/h) |
| 90 mph (144.84 km/h) | 97.98 mph (157.68 km/h) |
| 95 mph (152.89 km/h) | 103.42 mph (166.44 km/h) |
| 100 mph (160.93 km/h) | 108.86 mph (175.2 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
