Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 255/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 25.02 (635.6) | -0.06 (-1.6) -0.3% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 78.81 (2001.82) | 78.61 (1996.8) | -0.2 (-5.03) -0.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.01 (76.5) | -0.53 (-13.5) -15% |
| Revolutions per mile (km) | 803.94 (499.54) | 805.96 (500.8) | 2.02 (1.26) 0.3% |
255/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.11 km/h) |
| 25 mph (40.23 km/h) | 24.94 mph (40.13 km/h) |
| 30 mph (48.28 km/h) | 29.92 mph (48.16 km/h) |
| 35 mph (56.33 km/h) | 34.91 mph (56.19 km/h) |
| 40 mph (64.37 km/h) | 39.9 mph (64.21 km/h) |
| 45 mph (72.42 km/h) | 44.89 mph (72.24 km/h) |
| 50 mph (80.47 km/h) | 49.87 mph (80.27 km/h) |
| 55 mph (88.51 km/h) | 54.86 mph (88.29 km/h) |
| 60 mph (96.56 km/h) | 59.85 mph (96.32 km/h) |
| 65 mph (104.61 km/h) | 64.84 mph (104.34 km/h) |
| 70 mph (112.65 km/h) | 69.82 mph (112.37 km/h) |
| 75 mph (120.7 km/h) | 74.81 mph (120.4 km/h) |
| 80 mph (128.75 km/h) | 79.8 mph (128.42 km/h) |
| 85 mph (136.79 km/h) | 84.79 mph (136.45 km/h) |
| 90 mph (144.84 km/h) | 89.77 mph (144.48 km/h) |
| 95 mph (152.89 km/h) | 94.76 mph (152.5 km/h) |
| 100 mph (160.93 km/h) | 99.75 mph (160.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2051 | 2383 | 2566 | 2679 | 2802 | 2889 | 2985 | 3098 | 3255 | 3413 | 3587 | 3727 | 3980 | 4259 | 4477 | 4617 | 4696 | 4984 | 5385 | 6258 |
Better Fuel Economy Factory Ratios Increased Power
