Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 205/30-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 18.84 (478.6) | 0.07 (1.8) 0.4% |
| Width inches (mm) | 8.46 (215) | 8.07 (205) | -0.39 (-10) -4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 59.2 (1503.57) | 0.22 (5.65) 0.4% |
| Sidewall Height inches (mm) | 3.39 (86) | 2.42 (61.5) | -0.96 (-24.5) -28.5% |
| Revolutions per mile (km) | 1074.39 (667.59) | 1070.35 (665.08) | -4.04 (-2.51) -0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.31 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.39 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.46 km/h) |
| 35 mph (56.33 km/h) | 35.13 mph (56.54 km/h) |
| 40 mph (64.37 km/h) | 40.15 mph (64.62 km/h) |
| 45 mph (72.42 km/h) | 45.17 mph (72.69 km/h) |
| 50 mph (80.47 km/h) | 50.19 mph (80.77 km/h) |
| 55 mph (88.51 km/h) | 55.21 mph (88.85 km/h) |
| 60 mph (96.56 km/h) | 60.23 mph (96.93 km/h) |
| 65 mph (104.61 km/h) | 65.25 mph (105 km/h) |
| 70 mph (112.65 km/h) | 70.26 mph (113.08 km/h) |
| 75 mph (120.7 km/h) | 75.28 mph (121.16 km/h) |
| 80 mph (128.75 km/h) | 80.3 mph (129.23 km/h) |
| 85 mph (136.79 km/h) | 85.32 mph (137.31 km/h) |
| 90 mph (144.84 km/h) | 90.34 mph (145.39 km/h) |
| 95 mph (152.89 km/h) | 95.36 mph (153.47 km/h) |
| 100 mph (160.93 km/h) | 100.38 mph (161.54 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
