Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 32.71 (830.8) | -4.73 (-120.2) -12.6% |
| Width inches (mm) | 12.4 (315) | 11.22 (285) | -1.18 (-30) -9.5% |
| Circum. inches (mm) | 117.62 (2987.65) | 102.76 (2610.04) | -14.87 (-377.62) -12.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 7.85 (199.5) | 4.13 (105) 111.1% |
| Revolutions per mile (km) | 538.66 (334.71) | 616.6 (383.14) | 77.93 (48.43) 14.5% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.47 mph (28.12 km/h) |
| 25 mph (40.23 km/h) | 21.84 mph (35.15 km/h) |
| 30 mph (48.28 km/h) | 26.21 mph (42.18 km/h) |
| 35 mph (56.33 km/h) | 30.58 mph (49.21 km/h) |
| 40 mph (64.37 km/h) | 34.94 mph (56.24 km/h) |
| 45 mph (72.42 km/h) | 39.31 mph (63.27 km/h) |
| 50 mph (80.47 km/h) | 43.68 mph (70.3 km/h) |
| 55 mph (88.51 km/h) | 48.05 mph (77.33 km/h) |
| 60 mph (96.56 km/h) | 52.42 mph (84.36 km/h) |
| 65 mph (104.61 km/h) | 56.78 mph (91.39 km/h) |
| 70 mph (112.65 km/h) | 61.15 mph (98.42 km/h) |
| 75 mph (120.7 km/h) | 65.52 mph (105.45 km/h) |
| 80 mph (128.75 km/h) | 69.89 mph (112.47 km/h) |
| 85 mph (136.79 km/h) | 74.26 mph (119.5 km/h) |
| 90 mph (144.84 km/h) | 78.62 mph (126.53 km/h) |
| 95 mph (152.89 km/h) | 82.99 mph (133.56 km/h) |
| 100 mph (160.93 km/h) | 87.36 mph (140.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1569 | 1823 | 1963 | 2050 | 2143 | 2210 | 2284 | 2370 | 2491 | 2611 | 2744 | 2851 | 3045 | 3258 | 3425 | 3532 | 3592 | 3813 | 4120 | 4788 |
Better Fuel Economy Factory Ratios Increased Power
