Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 21.13 (536.8) | -0.58 (-14.7) -2.7% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 68.21 (1732.59) | 66.39 (1686.41) | -1.82 (-46.18) -2.7% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.57 (116) | 1.21 (30.75) 36.1% |
| Revolutions per mile (km) | 928.87 (577.17) | 954.3 (592.98) | 25.44 (15.81) 2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.47 mph (31.33 km/h) |
| 25 mph (40.23 km/h) | 24.33 mph (39.16 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (46.99 km/h) |
| 35 mph (56.33 km/h) | 34.07 mph (54.83 km/h) |
| 40 mph (64.37 km/h) | 38.93 mph (62.66 km/h) |
| 45 mph (72.42 km/h) | 43.8 mph (70.49 km/h) |
| 50 mph (80.47 km/h) | 48.67 mph (78.32 km/h) |
| 55 mph (88.51 km/h) | 53.53 mph (86.15 km/h) |
| 60 mph (96.56 km/h) | 58.4 mph (93.99 km/h) |
| 65 mph (104.61 km/h) | 63.27 mph (101.82 km/h) |
| 70 mph (112.65 km/h) | 68.13 mph (109.65 km/h) |
| 75 mph (120.7 km/h) | 73 mph (117.48 km/h) |
| 80 mph (128.75 km/h) | 77.87 mph (125.32 km/h) |
| 85 mph (136.79 km/h) | 82.73 mph (133.15 km/h) |
| 90 mph (144.84 km/h) | 87.6 mph (140.98 km/h) |
| 95 mph (152.89 km/h) | 92.47 mph (148.81 km/h) |
| 100 mph (160.93 km/h) | 97.33 mph (156.65 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
