Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-19 | 305/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.98 (710.6) | 28.61 (726.6) | 0.63 (16) 2.3% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 87.89 (2232.42) | 89.87 (2282.68) | 1.98 (50.27) 2.3% |
| Sidewall Height inches (mm) | 4.49 (114) | 4.8 (122) | 0.31 (8) 7% |
| Revolutions per mile (km) | 720.9 (447.94) | 705.02 (438.08) | -15.87 (-9.86) -2.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.14 km/h) |
| 30 mph (48.28 km/h) | 30.68 mph (49.37 km/h) |
| 35 mph (56.33 km/h) | 35.79 mph (57.6 km/h) |
| 40 mph (64.37 km/h) | 40.9 mph (65.82 km/h) |
| 45 mph (72.42 km/h) | 46.01 mph (74.05 km/h) |
| 50 mph (80.47 km/h) | 51.13 mph (82.28 km/h) |
| 55 mph (88.51 km/h) | 56.24 mph (90.51 km/h) |
| 60 mph (96.56 km/h) | 61.35 mph (98.74 km/h) |
| 65 mph (104.61 km/h) | 66.46 mph (106.96 km/h) |
| 70 mph (112.65 km/h) | 71.58 mph (115.19 km/h) |
| 75 mph (120.7 km/h) | 76.69 mph (123.42 km/h) |
| 80 mph (128.75 km/h) | 81.8 mph (131.65 km/h) |
| 85 mph (136.79 km/h) | 86.91 mph (139.87 km/h) |
| 90 mph (144.84 km/h) | 92.03 mph (148.1 km/h) |
| 95 mph (152.89 km/h) | 97.14 mph (156.33 km/h) |
| 100 mph (160.93 km/h) | 102.25 mph (164.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1794 | 2084 | 2245 | 2344 | 2451 | 2527 | 2611 | 2710 | 2848 | 2985 | 3138 | 3260 | 3481 | 3726 | 3917 | 4039 | 4107 | 4359 | 4711 | 5474 |
Better Fuel Economy Factory Ratios Increased Power
