Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/60-12 | 140/20-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.67 (448.8) | 14.2 (360.8) | -3.46 (-88) -19.6% |
| Width inches (mm) | 4.72 (120) | 5.51 (140) | 0.79 (20) 16.7% |
| Circum. inches (mm) | 55.51 (1409.95) | 44.63 (1133.49) | -10.88 (-276.46) -19.6% |
| Sidewall Height inches (mm) | 2.83 (72) | 1.1 (28) | -1.73 (-44) -61.1% |
| Revolutions per mile (km) | 1141.42 (709.25) | 1419.82 (882.23) | 278.4 (172.99) 24.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.08 mph (25.88 km/h) |
| 25 mph (40.23 km/h) | 20.1 mph (32.34 km/h) |
| 30 mph (48.28 km/h) | 24.12 mph (38.81 km/h) |
| 35 mph (56.33 km/h) | 28.14 mph (45.28 km/h) |
| 40 mph (64.37 km/h) | 32.16 mph (51.75 km/h) |
| 45 mph (72.42 km/h) | 36.18 mph (58.22 km/h) |
| 50 mph (80.47 km/h) | 40.2 mph (64.69 km/h) |
| 55 mph (88.51 km/h) | 44.22 mph (71.16 km/h) |
| 60 mph (96.56 km/h) | 48.24 mph (77.63 km/h) |
| 65 mph (104.61 km/h) | 52.25 mph (84.1 km/h) |
| 70 mph (112.65 km/h) | 56.27 mph (90.57 km/h) |
| 75 mph (120.7 km/h) | 60.29 mph (97.03 km/h) |
| 80 mph (128.75 km/h) | 64.31 mph (103.5 km/h) |
| 85 mph (136.79 km/h) | 68.33 mph (109.97 km/h) |
| 90 mph (144.84 km/h) | 72.35 mph (116.44 km/h) |
| 95 mph (152.89 km/h) | 76.37 mph (122.91 km/h) |
| 100 mph (160.93 km/h) | 80.39 mph (129.38 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
