Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/60-12 | 180/60-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.67 (448.8) | 20.5 (520.8) | 2.83 (72) 16% |
| Width inches (mm) | 4.72 (120) | 7.09 (180) | 2.36 (60) 50% |
| Circum. inches (mm) | 55.51 (1409.95) | 64.42 (1636.14) | 8.91 (226.19) 16% |
| Sidewall Height inches (mm) | 2.83 (72) | 4.25 (108) | 1.42 (36) 50% |
| Revolutions per mile (km) | 1141.42 (709.25) | 983.62 (611.19) | -157.8 (-98.05) -13.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.21 mph (37.35 km/h) |
| 25 mph (40.23 km/h) | 29.01 mph (46.69 km/h) |
| 30 mph (48.28 km/h) | 34.81 mph (56.03 km/h) |
| 35 mph (56.33 km/h) | 40.61 mph (65.36 km/h) |
| 40 mph (64.37 km/h) | 46.42 mph (74.7 km/h) |
| 45 mph (72.42 km/h) | 52.22 mph (84.04 km/h) |
| 50 mph (80.47 km/h) | 58.02 mph (93.38 km/h) |
| 55 mph (88.51 km/h) | 63.82 mph (102.71 km/h) |
| 60 mph (96.56 km/h) | 69.63 mph (112.05 km/h) |
| 65 mph (104.61 km/h) | 75.43 mph (121.39 km/h) |
| 70 mph (112.65 km/h) | 81.23 mph (130.73 km/h) |
| 75 mph (120.7 km/h) | 87.03 mph (140.06 km/h) |
| 80 mph (128.75 km/h) | 92.83 mph (149.4 km/h) |
| 85 mph (136.79 km/h) | 98.64 mph (158.74 km/h) |
| 90 mph (144.84 km/h) | 104.44 mph (168.08 km/h) |
| 95 mph (152.89 km/h) | 110.24 mph (177.42 km/h) |
| 100 mph (160.93 km/h) | 116.04 mph (186.75 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
