Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 225/35-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 18.2 (462.3) | -0.57 (-14.5) -3% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 58.97 (1497.91) | 57.18 (1452.36) | -1.79 (-45.55) -3% |
| Sidewall Height inches (mm) | 3.39 (86) | 3.1 (78.75) | -0.29 (-7.25) -8.4% |
| Revolutions per mile (km) | 1074.39 (667.59) | 1108.09 (688.53) | 33.7 (20.94) 3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.39 mph (31.21 km/h) |
| 25 mph (40.23 km/h) | 24.24 mph (39.01 km/h) |
| 30 mph (48.28 km/h) | 29.09 mph (46.81 km/h) |
| 35 mph (56.33 km/h) | 33.94 mph (54.61 km/h) |
| 40 mph (64.37 km/h) | 38.78 mph (62.42 km/h) |
| 45 mph (72.42 km/h) | 43.63 mph (70.22 km/h) |
| 50 mph (80.47 km/h) | 48.48 mph (78.02 km/h) |
| 55 mph (88.51 km/h) | 53.33 mph (85.82 km/h) |
| 60 mph (96.56 km/h) | 58.18 mph (93.62 km/h) |
| 65 mph (104.61 km/h) | 63.02 mph (101.43 km/h) |
| 70 mph (112.65 km/h) | 67.87 mph (109.23 km/h) |
| 75 mph (120.7 km/h) | 72.72 mph (117.03 km/h) |
| 80 mph (128.75 km/h) | 77.57 mph (124.83 km/h) |
| 85 mph (136.79 km/h) | 82.42 mph (132.63 km/h) |
| 90 mph (144.84 km/h) | 87.26 mph (140.44 km/h) |
| 95 mph (152.89 km/h) | 92.11 mph (148.24 km/h) |
| 100 mph (160.93 km/h) | 96.96 mph (156.04 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
