Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 215/50-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 20.46 (519.8) | 1.69 (43) 9% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 58.97 (1497.91) | 64.29 (1633) | 5.32 (135.09) 9% |
| Sidewall Height inches (mm) | 3.39 (86) | 4.23 (107.5) | 0.85 (21.5) 25% |
| Revolutions per mile (km) | 1074.39 (667.59) | 985.51 (612.37) | -88.88 (-55.23) -8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.09 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.86 km/h) |
| 30 mph (48.28 km/h) | 32.71 mph (52.63 km/h) |
| 35 mph (56.33 km/h) | 38.16 mph (61.41 km/h) |
| 40 mph (64.37 km/h) | 43.61 mph (70.18 km/h) |
| 45 mph (72.42 km/h) | 49.06 mph (78.95 km/h) |
| 50 mph (80.47 km/h) | 54.51 mph (87.72 km/h) |
| 55 mph (88.51 km/h) | 59.96 mph (96.5 km/h) |
| 60 mph (96.56 km/h) | 65.41 mph (105.27 km/h) |
| 65 mph (104.61 km/h) | 70.86 mph (114.04 km/h) |
| 70 mph (112.65 km/h) | 76.31 mph (122.81 km/h) |
| 75 mph (120.7 km/h) | 81.76 mph (131.59 km/h) |
| 80 mph (128.75 km/h) | 87.21 mph (140.36 km/h) |
| 85 mph (136.79 km/h) | 92.67 mph (149.13 km/h) |
| 90 mph (144.84 km/h) | 98.12 mph (157.9 km/h) |
| 95 mph (152.89 km/h) | 103.57 mph (166.68 km/h) |
| 100 mph (160.93 km/h) | 109.02 mph (175.45 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
