Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-14 | 225/30-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.09 (535.6) | 19.31 (490.6) | -1.77 (-45) -8.4% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 66.25 (1682.64) | 60.68 (1541.27) | -5.57 (-141.37) -8.4% |
| Sidewall Height inches (mm) | 3.54 (90) | 2.66 (67.5) | -0.89 (-22.5) -25% |
| Revolutions per mile (km) | 956.44 (594.3) | 1044.17 (648.82) | 87.73 (54.51) 9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.32 mph (29.48 km/h) |
| 25 mph (40.23 km/h) | 22.9 mph (36.85 km/h) |
| 30 mph (48.28 km/h) | 27.48 mph (44.22 km/h) |
| 35 mph (56.33 km/h) | 32.06 mph (51.59 km/h) |
| 40 mph (64.37 km/h) | 36.64 mph (58.97 km/h) |
| 45 mph (72.42 km/h) | 41.22 mph (66.34 km/h) |
| 50 mph (80.47 km/h) | 45.8 mph (73.71 km/h) |
| 55 mph (88.51 km/h) | 50.38 mph (81.08 km/h) |
| 60 mph (96.56 km/h) | 54.96 mph (88.45 km/h) |
| 65 mph (104.61 km/h) | 59.54 mph (95.82 km/h) |
| 70 mph (112.65 km/h) | 64.12 mph (103.19 km/h) |
| 75 mph (120.7 km/h) | 68.7 mph (110.56 km/h) |
| 80 mph (128.75 km/h) | 73.28 mph (117.93 km/h) |
| 85 mph (136.79 km/h) | 77.86 mph (125.3 km/h) |
| 90 mph (144.84 km/h) | 82.44 mph (132.67 km/h) |
| 95 mph (152.89 km/h) | 87.02 mph (140.04 km/h) |
| 100 mph (160.93 km/h) | 91.6 mph (147.41 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
