Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/60-12 | 140/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.67 (448.8) | 19.72 (500.8) | 2.05 (52) 11.6% |
| Width inches (mm) | 4.72 (120) | 5.51 (140) | 0.79 (20) 16.7% |
| Circum. inches (mm) | 55.51 (1409.95) | 61.94 (1573.31) | 6.43 (163.36) 11.6% |
| Sidewall Height inches (mm) | 2.83 (72) | 3.86 (98) | 1.02 (26) 36.1% |
| Revolutions per mile (km) | 1141.42 (709.25) | 1022.9 (635.6) | -118.52 (-73.64) -10.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.32 mph (35.92 km/h) |
| 25 mph (40.23 km/h) | 27.9 mph (44.9 km/h) |
| 30 mph (48.28 km/h) | 33.48 mph (53.87 km/h) |
| 35 mph (56.33 km/h) | 39.06 mph (62.85 km/h) |
| 40 mph (64.37 km/h) | 44.63 mph (71.83 km/h) |
| 45 mph (72.42 km/h) | 50.21 mph (80.81 km/h) |
| 50 mph (80.47 km/h) | 55.79 mph (89.79 km/h) |
| 55 mph (88.51 km/h) | 61.37 mph (98.77 km/h) |
| 60 mph (96.56 km/h) | 66.95 mph (107.75 km/h) |
| 65 mph (104.61 km/h) | 72.53 mph (116.73 km/h) |
| 70 mph (112.65 km/h) | 78.11 mph (125.71 km/h) |
| 75 mph (120.7 km/h) | 83.69 mph (134.69 km/h) |
| 80 mph (128.75 km/h) | 89.27 mph (143.67 km/h) |
| 85 mph (136.79 km/h) | 94.85 mph (152.64 km/h) |
| 90 mph (144.84 km/h) | 100.43 mph (161.62 km/h) |
| 95 mph (152.89 km/h) | 106.01 mph (170.6 km/h) |
| 100 mph (160.93 km/h) | 111.59 mph (179.58 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
