Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 205/50-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 20.07 (509.8) | 1.3 (33) 6.9% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 63.05 (1601.58) | 4.08 (103.67) 6.9% |
| Sidewall Height inches (mm) | 3.39 (86) | 4.04 (102.5) | 0.65 (16.5) 19.2% |
| Revolutions per mile (km) | 1074.39 (667.59) | 1004.85 (624.38) | -69.55 (-43.21) -6.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.38 mph (34.41 km/h) |
| 25 mph (40.23 km/h) | 26.73 mph (43.02 km/h) |
| 30 mph (48.28 km/h) | 32.08 mph (51.62 km/h) |
| 35 mph (56.33 km/h) | 37.42 mph (60.23 km/h) |
| 40 mph (64.37 km/h) | 42.77 mph (68.83 km/h) |
| 45 mph (72.42 km/h) | 48.11 mph (77.43 km/h) |
| 50 mph (80.47 km/h) | 53.46 mph (86.04 km/h) |
| 55 mph (88.51 km/h) | 58.81 mph (94.64 km/h) |
| 60 mph (96.56 km/h) | 64.15 mph (103.24 km/h) |
| 65 mph (104.61 km/h) | 69.5 mph (111.85 km/h) |
| 70 mph (112.65 km/h) | 74.84 mph (120.45 km/h) |
| 75 mph (120.7 km/h) | 80.19 mph (129.05 km/h) |
| 80 mph (128.75 km/h) | 85.54 mph (137.66 km/h) |
| 85 mph (136.79 km/h) | 90.88 mph (146.26 km/h) |
| 90 mph (144.84 km/h) | 96.23 mph (154.87 km/h) |
| 95 mph (152.89 km/h) | 101.58 mph (163.47 km/h) |
| 100 mph (160.93 km/h) | 106.92 mph (172.07 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
