Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 245/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 25.61 (650.5) | 1.63 (41.5) 6.8% |
| Width inches (mm) | 11.22 (285) | 9.65 (245) | -1.57 (-40) -14% |
| Circum. inches (mm) | 75.32 (1913.23) | 80.46 (2043.61) | 5.13 (130.38) 6.8% |
| Sidewall Height inches (mm) | 4.49 (114) | 5.31 (134.75) | 0.82 (20.75) 18.2% |
| Revolutions per mile (km) | 841.17 (522.68) | 787.5 (489.33) | -53.66 (-33.35) -6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.38 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.98 km/h) |
| 30 mph (48.28 km/h) | 32.04 mph (51.57 km/h) |
| 35 mph (56.33 km/h) | 37.39 mph (60.17 km/h) |
| 40 mph (64.37 km/h) | 42.73 mph (68.76 km/h) |
| 45 mph (72.42 km/h) | 48.07 mph (77.36 km/h) |
| 50 mph (80.47 km/h) | 53.41 mph (85.95 km/h) |
| 55 mph (88.51 km/h) | 58.75 mph (94.55 km/h) |
| 60 mph (96.56 km/h) | 64.09 mph (103.14 km/h) |
| 65 mph (104.61 km/h) | 69.43 mph (111.74 km/h) |
| 70 mph (112.65 km/h) | 74.77 mph (120.33 km/h) |
| 75 mph (120.7 km/h) | 80.11 mph (128.93 km/h) |
| 80 mph (128.75 km/h) | 85.45 mph (137.52 km/h) |
| 85 mph (136.79 km/h) | 90.79 mph (146.12 km/h) |
| 90 mph (144.84 km/h) | 96.13 mph (154.71 km/h) |
| 95 mph (152.89 km/h) | 101.47 mph (163.31 km/h) |
| 100 mph (160.93 km/h) | 106.81 mph (171.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | 2328 | 2507 | 2618 | 2737 | 2823 | 2917 | 3027 | 3181 | 3334 | 3505 | 3641 | 3889 | 4162 | 4375 | 4511 | 4588 | 4869 | 5262 | 6114 |
Better Fuel Economy Factory Ratios Increased Power
