Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/80-17 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.8 (807.8) | 32.71 (830.8) | 0.91 (23) 2.8% |
| Width inches (mm) | 9.25 (235) | 11.22 (285) | 1.97 (50) 21.3% |
| Circum. inches (mm) | 99.91 (2537.78) | 102.76 (2610.04) | 2.84 (72.26) 2.8% |
| Sidewall Height inches (mm) | 7.4 (188) | 7.85 (199.5) | 0.45 (11.5) 6.1% |
| Revolutions per mile (km) | 634.15 (394.04) | 616.6 (383.14) | -17.56 (-10.91) -2.8% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.57 mph (33.1 km/h) |
| 25 mph (40.23 km/h) | 25.71 mph (41.38 km/h) |
| 30 mph (48.28 km/h) | 30.85 mph (49.66 km/h) |
| 35 mph (56.33 km/h) | 36 mph (57.93 km/h) |
| 40 mph (64.37 km/h) | 41.14 mph (66.21 km/h) |
| 45 mph (72.42 km/h) | 46.28 mph (74.48 km/h) |
| 50 mph (80.47 km/h) | 51.42 mph (82.76 km/h) |
| 55 mph (88.51 km/h) | 56.57 mph (91.03 km/h) |
| 60 mph (96.56 km/h) | 61.71 mph (99.31 km/h) |
| 65 mph (104.61 km/h) | 66.85 mph (107.59 km/h) |
| 70 mph (112.65 km/h) | 71.99 mph (115.86 km/h) |
| 75 mph (120.7 km/h) | 77.14 mph (124.14 km/h) |
| 80 mph (128.75 km/h) | 82.28 mph (132.41 km/h) |
| 85 mph (136.79 km/h) | 87.42 mph (140.69 km/h) |
| 90 mph (144.84 km/h) | 92.56 mph (148.97 km/h) |
| 95 mph (152.89 km/h) | 97.7 mph (157.24 km/h) |
| 100 mph (160.93 km/h) | 102.85 mph (165.52 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
