Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/50-12 | 225/40-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.46 (519.8) | 19.09 (484.8) | -1.38 (-35) -6.7% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 64.29 (1633) | 59.96 (1523.04) | -4.33 (-109.96) -6.7% |
| Sidewall Height inches (mm) | 4.23 (107.5) | 3.54 (90) | -0.69 (-17.5) -16.3% |
| Revolutions per mile (km) | 985.51 (612.37) | 1056.66 (656.58) | 71.15 (44.21) 7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.65 mph (30.02 km/h) |
| 25 mph (40.23 km/h) | 23.32 mph (37.52 km/h) |
| 30 mph (48.28 km/h) | 27.98 mph (45.03 km/h) |
| 35 mph (56.33 km/h) | 32.64 mph (52.53 km/h) |
| 40 mph (64.37 km/h) | 37.31 mph (60.04 km/h) |
| 45 mph (72.42 km/h) | 41.97 mph (67.54 km/h) |
| 50 mph (80.47 km/h) | 46.63 mph (75.05 km/h) |
| 55 mph (88.51 km/h) | 51.3 mph (82.55 km/h) |
| 60 mph (96.56 km/h) | 55.96 mph (90.06 km/h) |
| 65 mph (104.61 km/h) | 60.62 mph (97.56 km/h) |
| 70 mph (112.65 km/h) | 65.29 mph (105.07 km/h) |
| 75 mph (120.7 km/h) | 69.95 mph (112.57 km/h) |
| 80 mph (128.75 km/h) | 74.61 mph (120.08 km/h) |
| 85 mph (136.79 km/h) | 79.28 mph (127.58 km/h) |
| 90 mph (144.84 km/h) | 83.94 mph (135.09 km/h) |
| 95 mph (152.89 km/h) | 88.6 mph (142.59 km/h) |
| 100 mph (160.93 km/h) | 93.27 mph (150.1 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
