Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/65-12 | 180/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.4 (467.3) | 21.92 (556.8) | 3.52 (89.5) 19.2% |
| Width inches (mm) | 4.92 (125) | 7.09 (180) | 2.17 (55) 44% |
| Circum. inches (mm) | 57.8 (1468.07) | 68.87 (1749.24) | 11.07 (281.17) 19.2% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.96 (126) | 1.76 (44.75) 55.1% |
| Revolutions per mile (km) | 1096.23 (681.17) | 920.03 (571.68) | -176.21 (-109.49) -16.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.83 mph (38.35 km/h) |
| 25 mph (40.23 km/h) | 29.79 mph (47.94 km/h) |
| 30 mph (48.28 km/h) | 35.75 mph (57.53 km/h) |
| 35 mph (56.33 km/h) | 41.7 mph (67.12 km/h) |
| 40 mph (64.37 km/h) | 47.66 mph (76.7 km/h) |
| 45 mph (72.42 km/h) | 53.62 mph (86.29 km/h) |
| 50 mph (80.47 km/h) | 59.58 mph (95.88 km/h) |
| 55 mph (88.51 km/h) | 65.53 mph (105.47 km/h) |
| 60 mph (96.56 km/h) | 71.49 mph (115.05 km/h) |
| 65 mph (104.61 km/h) | 77.45 mph (124.64 km/h) |
| 70 mph (112.65 km/h) | 83.41 mph (134.23 km/h) |
| 75 mph (120.7 km/h) | 89.36 mph (143.82 km/h) |
| 80 mph (128.75 km/h) | 95.32 mph (153.41 km/h) |
| 85 mph (136.79 km/h) | 101.28 mph (162.99 km/h) |
| 90 mph (144.84 km/h) | 107.24 mph (172.58 km/h) |
| 95 mph (152.89 km/h) | 113.19 mph (182.17 km/h) |
| 100 mph (160.93 km/h) | 119.15 mph (191.76 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
