Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-14 | 215/40-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.31 (490.6) | 18.77 (476.8) | -0.54 (-13.8) -2.8% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 60.68 (1541.27) | 58.97 (1497.91) | -1.71 (-43.35) -2.8% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 3.39 (86) | 0.73 (18.5) 27.4% |
| Revolutions per mile (km) | 1044.17 (648.82) | 1074.39 (667.59) | 30.22 (18.78) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.02 mph (54.74 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.56 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.38 km/h) |
| 50 mph (80.47 km/h) | 48.59 mph (78.2 km/h) |
| 55 mph (88.51 km/h) | 53.45 mph (86.02 km/h) |
| 60 mph (96.56 km/h) | 58.31 mph (93.84 km/h) |
| 65 mph (104.61 km/h) | 63.17 mph (101.67 km/h) |
| 70 mph (112.65 km/h) | 68.03 mph (109.49 km/h) |
| 75 mph (120.7 km/h) | 72.89 mph (117.31 km/h) |
| 80 mph (128.75 km/h) | 77.75 mph (125.13 km/h) |
| 85 mph (136.79 km/h) | 82.61 mph (132.95 km/h) |
| 90 mph (144.84 km/h) | 87.47 mph (140.77 km/h) |
| 95 mph (152.89 km/h) | 92.33 mph (148.59 km/h) |
| 100 mph (160.93 km/h) | 97.19 mph (156.41 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
