Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/50-12 | 205/40-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.46 (519.8) | 18.46 (468.8) | -2.01 (-51) -9.8% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 64.29 (1633) | 57.98 (1472.78) | -6.31 (-160.22) -9.8% |
| Sidewall Height inches (mm) | 4.23 (107.5) | 3.23 (82) | -1 (-25.5) -23.7% |
| Revolutions per mile (km) | 985.51 (612.37) | 1092.73 (678.99) | 107.21 (66.62) 10.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.04 mph (29.03 km/h) |
| 25 mph (40.23 km/h) | 22.55 mph (36.29 km/h) |
| 30 mph (48.28 km/h) | 27.06 mph (43.54 km/h) |
| 35 mph (56.33 km/h) | 31.57 mph (50.8 km/h) |
| 40 mph (64.37 km/h) | 36.08 mph (58.06 km/h) |
| 45 mph (72.42 km/h) | 40.58 mph (65.32 km/h) |
| 50 mph (80.47 km/h) | 45.09 mph (72.57 km/h) |
| 55 mph (88.51 km/h) | 49.6 mph (79.83 km/h) |
| 60 mph (96.56 km/h) | 54.11 mph (87.09 km/h) |
| 65 mph (104.61 km/h) | 58.62 mph (94.34 km/h) |
| 70 mph (112.65 km/h) | 63.13 mph (101.6 km/h) |
| 75 mph (120.7 km/h) | 67.64 mph (108.86 km/h) |
| 80 mph (128.75 km/h) | 72.15 mph (116.12 km/h) |
| 85 mph (136.79 km/h) | 76.66 mph (123.37 km/h) |
| 90 mph (144.84 km/h) | 81.17 mph (130.63 km/h) |
| 95 mph (152.89 km/h) | 85.68 mph (137.89 km/h) |
| 100 mph (160.93 km/h) | 90.19 mph (145.14 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
