Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 205/50-10 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 18.07 (459) | -0.7 (-17.8) -3.7% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 56.77 (1441.99) | -2.2 (-55.92) -3.7% |
| 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) | 1116.06 (693.48) | 41.66 (25.89) 3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.25 mph (30.99 km/h) |
| 25 mph (40.23 km/h) | 24.07 mph (38.73 km/h) |
| 30 mph (48.28 km/h) | 28.88 mph (46.48 km/h) |
| 35 mph (56.33 km/h) | 33.69 mph (54.22 km/h) |
| 40 mph (64.37 km/h) | 38.51 mph (61.97 km/h) |
| 45 mph (72.42 km/h) | 43.32 mph (69.72 km/h) |
| 50 mph (80.47 km/h) | 48.13 mph (77.46 km/h) |
| 55 mph (88.51 km/h) | 52.95 mph (85.21 km/h) |
| 60 mph (96.56 km/h) | 57.76 mph (92.96 km/h) |
| 65 mph (104.61 km/h) | 62.57 mph (100.7 km/h) |
| 70 mph (112.65 km/h) | 67.39 mph (108.45 km/h) |
| 75 mph (120.7 km/h) | 72.2 mph (116.19 km/h) |
| 80 mph (128.75 km/h) | 77.01 mph (123.94 km/h) |
| 85 mph (136.79 km/h) | 81.83 mph (131.69 km/h) |
| 90 mph (144.84 km/h) | 86.64 mph (139.43 km/h) |
| 95 mph (152.89 km/h) | 91.45 mph (147.18 km/h) |
| 100 mph (160.93 km/h) | 96.27 mph (154.93 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
