Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-12 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.13 (536.8) | 21.76 (552.8) | 0.63 (16) 3% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 66.39 (1686.41) | 68.37 (1736.67) | 1.98 (50.27) 3% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.88 (124) | 0.31 (8) 6.9% |
| Revolutions per mile (km) | 954.3 (592.98) | 926.68 (575.81) | -27.62 (-17.16) -2.9% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.6 mph (33.15 km/h) |
| 25 mph (40.23 km/h) | 25.75 mph (41.43 km/h) |
| 30 mph (48.28 km/h) | 30.89 mph (49.72 km/h) |
| 35 mph (56.33 km/h) | 36.04 mph (58.01 km/h) |
| 40 mph (64.37 km/h) | 41.19 mph (66.29 km/h) |
| 45 mph (72.42 km/h) | 46.34 mph (74.58 km/h) |
| 50 mph (80.47 km/h) | 51.49 mph (82.87 km/h) |
| 55 mph (88.51 km/h) | 56.64 mph (91.15 km/h) |
| 60 mph (96.56 km/h) | 61.79 mph (99.44 km/h) |
| 65 mph (104.61 km/h) | 66.94 mph (107.73 km/h) |
| 70 mph (112.65 km/h) | 72.09 mph (116.01 km/h) |
| 75 mph (120.7 km/h) | 77.24 mph (124.3 km/h) |
| 80 mph (128.75 km/h) | 82.38 mph (132.59 km/h) |
| 85 mph (136.79 km/h) | 87.53 mph (140.87 km/h) |
| 90 mph (144.84 km/h) | 92.68 mph (149.16 km/h) |
| 95 mph (152.89 km/h) | 97.83 mph (157.44 km/h) |
| 100 mph (160.93 km/h) | 102.98 mph (165.73 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
