Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.76 (552.8) | 21.13 (536.8) | -0.63 (-16) -2.9% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 68.37 (1736.67) | 66.39 (1686.41) | -1.98 (-50.27) -2.9% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.57 (116) | -0.31 (-8) -6.5% |
| Revolutions per mile (km) | 926.68 (575.81) | 954.3 (592.98) | 27.62 (17.16) 3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.26 km/h) |
| 25 mph (40.23 km/h) | 24.28 mph (39.07 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.88 km/h) |
| 35 mph (56.33 km/h) | 33.99 mph (54.7 km/h) |
| 40 mph (64.37 km/h) | 38.84 mph (62.51 km/h) |
| 45 mph (72.42 km/h) | 43.7 mph (70.32 km/h) |
| 50 mph (80.47 km/h) | 48.55 mph (78.14 km/h) |
| 55 mph (88.51 km/h) | 53.41 mph (85.95 km/h) |
| 60 mph (96.56 km/h) | 58.26 mph (93.77 km/h) |
| 65 mph (104.61 km/h) | 63.12 mph (101.58 km/h) |
| 70 mph (112.65 km/h) | 67.97 mph (109.39 km/h) |
| 75 mph (120.7 km/h) | 72.83 mph (117.21 km/h) |
| 80 mph (128.75 km/h) | 77.68 mph (125.02 km/h) |
| 85 mph (136.79 km/h) | 82.54 mph (132.84 km/h) |
| 90 mph (144.84 km/h) | 87.4 mph (140.65 km/h) |
| 95 mph (152.89 km/h) | 92.25 mph (148.46 km/h) |
| 100 mph (160.93 km/h) | 97.11 mph (156.28 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
