Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-14 | 145/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.71 (526.1) | 19.99 (507.8) | -0.72 (-18.3) -3.5% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 65.07 (1652.79) | 62.81 (1595.3) | -2.26 (-57.49) -3.5% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4 (101.5) | 0.64 (16.25) 19.1% |
| Revolutions per mile (km) | 973.71 (605.04) | 1008.8 (626.84) | 35.09 (21.8) 3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.3 mph (31.07 km/h) |
| 25 mph (40.23 km/h) | 24.13 mph (38.83 km/h) |
| 30 mph (48.28 km/h) | 28.96 mph (46.6 km/h) |
| 35 mph (56.33 km/h) | 33.78 mph (54.37 km/h) |
| 40 mph (64.37 km/h) | 38.61 mph (62.13 km/h) |
| 45 mph (72.42 km/h) | 43.43 mph (69.9 km/h) |
| 50 mph (80.47 km/h) | 48.26 mph (77.67 km/h) |
| 55 mph (88.51 km/h) | 53.09 mph (85.44 km/h) |
| 60 mph (96.56 km/h) | 57.91 mph (93.2 km/h) |
| 65 mph (104.61 km/h) | 62.74 mph (100.97 km/h) |
| 70 mph (112.65 km/h) | 67.57 mph (108.74 km/h) |
| 75 mph (120.7 km/h) | 72.39 mph (116.5 km/h) |
| 80 mph (128.75 km/h) | 77.22 mph (124.27 km/h) |
| 85 mph (136.79 km/h) | 82.04 mph (132.04 km/h) |
| 90 mph (144.84 km/h) | 86.87 mph (139.8 km/h) |
| 95 mph (152.89 km/h) | 91.7 mph (147.57 km/h) |
| 100 mph (160.93 km/h) | 96.52 mph (155.34 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
