Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 205/40-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 20.46 (519.6) | 1.69 (42.8) 9% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 64.27 (1632.37) | 5.29 (134.46) 9% |
| Sidewall Height inches (mm) | 3.39 (86) | 3.23 (82) | -0.16 (-4) -4.7% |
| Revolutions per mile (km) | 1074.39 (667.59) | 985.89 (612.6) | -88.5 (-54.99) -8.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.24 mph (43.85 km/h) |
| 30 mph (48.28 km/h) | 32.69 mph (52.61 km/h) |
| 35 mph (56.33 km/h) | 38.14 mph (61.38 km/h) |
| 40 mph (64.37 km/h) | 43.59 mph (70.15 km/h) |
| 45 mph (72.42 km/h) | 49.04 mph (78.92 km/h) |
| 50 mph (80.47 km/h) | 54.49 mph (87.69 km/h) |
| 55 mph (88.51 km/h) | 59.94 mph (96.46 km/h) |
| 60 mph (96.56 km/h) | 65.39 mph (105.23 km/h) |
| 65 mph (104.61 km/h) | 70.83 mph (114 km/h) |
| 70 mph (112.65 km/h) | 76.28 mph (122.77 km/h) |
| 75 mph (120.7 km/h) | 81.73 mph (131.54 km/h) |
| 80 mph (128.75 km/h) | 87.18 mph (140.3 km/h) |
| 85 mph (136.79 km/h) | 92.63 mph (149.07 km/h) |
| 90 mph (144.84 km/h) | 98.08 mph (157.84 km/h) |
| 95 mph (152.89 km/h) | 103.53 mph (166.61 km/h) |
| 100 mph (160.93 km/h) | 108.98 mph (175.38 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
