Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-14 | 255/40-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.31 (490.6) | 22.03 (559.6) | 2.72 (69) 14.1% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 60.68 (1541.27) | 69.21 (1758.04) | 8.53 (216.77) 14.1% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 4.02 (102) | 1.36 (34.5) 51.1% |
| Revolutions per mile (km) | 1044.17 (648.82) | 915.42 (568.82) | -128.75 (-80) -12.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.81 mph (36.71 km/h) |
| 25 mph (40.23 km/h) | 28.52 mph (45.89 km/h) |
| 30 mph (48.28 km/h) | 34.22 mph (55.07 km/h) |
| 35 mph (56.33 km/h) | 39.92 mph (64.25 km/h) |
| 40 mph (64.37 km/h) | 45.63 mph (73.43 km/h) |
| 45 mph (72.42 km/h) | 51.33 mph (82.61 km/h) |
| 50 mph (80.47 km/h) | 57.03 mph (91.78 km/h) |
| 55 mph (88.51 km/h) | 62.74 mph (100.96 km/h) |
| 60 mph (96.56 km/h) | 68.44 mph (110.14 km/h) |
| 65 mph (104.61 km/h) | 74.14 mph (119.32 km/h) |
| 70 mph (112.65 km/h) | 79.85 mph (128.5 km/h) |
| 75 mph (120.7 km/h) | 85.55 mph (137.68 km/h) |
| 80 mph (128.75 km/h) | 91.25 mph (146.86 km/h) |
| 85 mph (136.79 km/h) | 96.95 mph (156.03 km/h) |
| 90 mph (144.84 km/h) | 102.66 mph (165.21 km/h) |
| 95 mph (152.89 km/h) | 108.36 mph (174.39 km/h) |
| 100 mph (160.93 km/h) | 114.06 mph (183.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2330 | 2706 | 2914 | 3043 | 3182 | 3281 | 3390 | 3519 | 3698 | 3876 | 4074 | 4233 | 4520 | 4838 | 5085 | 5244 | 5333 | 5660 | 6116 | 7108 |
Better Fuel Economy Factory Ratios Increased Power
