Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/65-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.4 (467.3) | 21.13 (536.8) | 2.74 (69.5) 14.9% |
| Width inches (mm) | 4.92 (125) | 5.71 (145) | 0.79 (20) 16% |
| Circum. inches (mm) | 57.8 (1468.07) | 66.39 (1686.41) | 8.6 (218.34) 14.9% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.57 (116) | 1.37 (34.75) 42.8% |
| Revolutions per mile (km) | 1096.23 (681.17) | 954.3 (592.98) | -141.93 (-88.19) -12.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.97 mph (36.97 km/h) |
| 25 mph (40.23 km/h) | 28.72 mph (46.22 km/h) |
| 30 mph (48.28 km/h) | 34.46 mph (55.46 km/h) |
| 35 mph (56.33 km/h) | 40.21 mph (64.7 km/h) |
| 40 mph (64.37 km/h) | 45.95 mph (73.95 km/h) |
| 45 mph (72.42 km/h) | 51.69 mph (83.19 km/h) |
| 50 mph (80.47 km/h) | 57.44 mph (92.44 km/h) |
| 55 mph (88.51 km/h) | 63.18 mph (101.68 km/h) |
| 60 mph (96.56 km/h) | 68.92 mph (110.92 km/h) |
| 65 mph (104.61 km/h) | 74.67 mph (120.17 km/h) |
| 70 mph (112.65 km/h) | 80.41 mph (129.41 km/h) |
| 75 mph (120.7 km/h) | 86.15 mph (138.65 km/h) |
| 80 mph (128.75 km/h) | 91.9 mph (147.9 km/h) |
| 85 mph (136.79 km/h) | 97.64 mph (157.14 km/h) |
| 90 mph (144.84 km/h) | 103.39 mph (166.38 km/h) |
| 95 mph (152.89 km/h) | 109.13 mph (175.63 km/h) |
| 100 mph (160.93 km/h) | 114.87 mph (184.87 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
