Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-17 | 317/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.71 (830.8) | 34.47 (875.6) | 1.76 (44.8) 5.4% |
| Width inches (mm) | 11.22 (285) | 12.48 (317) | 1.26 (32) 11.2% |
| Circum. inches (mm) | 102.76 (2610.04) | 108.3 (2750.78) | 5.54 (140.74) 5.4% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 8.74 (221.9) | 0.88 (22.4) 11.2% |
| Revolutions per mile (km) | 616.6 (383.14) | 585.05 (363.53) | -31.55 (-19.6) -5.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.08 mph (33.92 km/h) |
| 25 mph (40.23 km/h) | 26.35 mph (42.4 km/h) |
| 30 mph (48.28 km/h) | 31.62 mph (50.88 km/h) |
| 35 mph (56.33 km/h) | 36.89 mph (59.36 km/h) |
| 40 mph (64.37 km/h) | 42.16 mph (67.85 km/h) |
| 45 mph (72.42 km/h) | 47.43 mph (76.33 km/h) |
| 50 mph (80.47 km/h) | 52.7 mph (84.81 km/h) |
| 55 mph (88.51 km/h) | 57.97 mph (93.29 km/h) |
| 60 mph (96.56 km/h) | 63.24 mph (101.77 km/h) |
| 65 mph (104.61 km/h) | 68.51 mph (110.25 km/h) |
| 70 mph (112.65 km/h) | 73.77 mph (118.73 km/h) |
| 75 mph (120.7 km/h) | 79.04 mph (127.21 km/h) |
| 80 mph (128.75 km/h) | 84.31 mph (135.69 km/h) |
| 85 mph (136.79 km/h) | 89.58 mph (144.17 km/h) |
| 90 mph (144.84 km/h) | 94.85 mph (152.65 km/h) |
| 95 mph (152.89 km/h) | 100.12 mph (161.13 km/h) |
| 100 mph (160.93 km/h) | 105.39 mph (169.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1489 | 1730 | 1863 | 1945 | 2034 | 2097 | 2167 | 2249 | 2363 | 2477 | 2604 | 2705 | 2889 | 3092 | 3250 | 3351 | 3408 | 3618 | 3909 | 4543 |
Better Fuel Economy Factory Ratios Increased Power
