Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/60-12 | 120/40-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.67 (448.8) | 15.78 (400.8) | -1.89 (-48) -10.7% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 55.51 (1409.95) | 49.57 (1259.15) | -5.94 (-150.8) -10.7% |
| Sidewall Height inches (mm) | 2.83 (72) | 1.89 (48) | -0.94 (-24) -33.3% |
| Revolutions per mile (km) | 1141.42 (709.25) | 1278.12 (794.18) | 136.7 (84.94) 12% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.86 mph (28.74 km/h) |
| 25 mph (40.23 km/h) | 22.33 mph (35.93 km/h) |
| 30 mph (48.28 km/h) | 26.79 mph (43.12 km/h) |
| 35 mph (56.33 km/h) | 31.26 mph (50.3 km/h) |
| 40 mph (64.37 km/h) | 35.72 mph (57.49 km/h) |
| 45 mph (72.42 km/h) | 40.19 mph (64.68 km/h) |
| 50 mph (80.47 km/h) | 44.65 mph (71.86 km/h) |
| 55 mph (88.51 km/h) | 49.12 mph (79.05 km/h) |
| 60 mph (96.56 km/h) | 53.58 mph (86.23 km/h) |
| 65 mph (104.61 km/h) | 58.05 mph (93.42 km/h) |
| 70 mph (112.65 km/h) | 62.51 mph (100.61 km/h) |
| 75 mph (120.7 km/h) | 66.98 mph (107.79 km/h) |
| 80 mph (128.75 km/h) | 71.44 mph (114.98 km/h) |
| 85 mph (136.79 km/h) | 75.91 mph (122.16 km/h) |
| 90 mph (144.84 km/h) | 80.37 mph (129.35 km/h) |
| 95 mph (152.89 km/h) | 84.84 mph (136.54 km/h) |
| 100 mph (160.93 km/h) | 89.3 mph (143.72 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
