Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-17 | 395/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.71 (830.8) | 46.44 (1179.5) | 13.73 (348.7) 42% |
| Width inches (mm) | 11.22 (285) | 15.55 (395) | 4.33 (110) 38.6% |
| Circum. inches (mm) | 102.76 (2610.04) | 145.89 (3705.51) | 43.13 (1095.47) 42% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 13.22 (335.75) | 5.36 (136.25) 68.3% |
| Revolutions per mile (km) | 616.6 (383.14) | 434.31 (269.87) | -182.29 (-113.27) -29.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.39 mph (45.7 km/h) |
| 25 mph (40.23 km/h) | 35.49 mph (57.12 km/h) |
| 30 mph (48.28 km/h) | 42.59 mph (68.54 km/h) |
| 35 mph (56.33 km/h) | 49.69 mph (79.97 km/h) |
| 40 mph (64.37 km/h) | 56.79 mph (91.39 km/h) |
| 45 mph (72.42 km/h) | 63.89 mph (102.82 km/h) |
| 50 mph (80.47 km/h) | 70.99 mph (114.24 km/h) |
| 55 mph (88.51 km/h) | 78.08 mph (125.66 km/h) |
| 60 mph (96.56 km/h) | 85.18 mph (137.09 km/h) |
| 65 mph (104.61 km/h) | 92.28 mph (148.51 km/h) |
| 70 mph (112.65 km/h) | 99.38 mph (159.94 km/h) |
| 75 mph (120.7 km/h) | 106.48 mph (171.36 km/h) |
| 80 mph (128.75 km/h) | 113.58 mph (182.79 km/h) |
| 85 mph (136.79 km/h) | 120.68 mph (194.21 km/h) |
| 90 mph (144.84 km/h) | 127.77 mph (205.63 km/h) |
| 95 mph (152.89 km/h) | 134.87 mph (217.06 km/h) |
| 100 mph (160.93 km/h) | 141.97 mph (228.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
