Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 325/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 41.75 (1060.5) | -4.69 (-119) -10.1% |
| Width inches (mm) | 15.55 (395) | 12.8 (325) | -2.76 (-70) -17.7% |
| Circum. inches (mm) | 145.89 (3705.51) | 131.17 (3331.66) | -14.72 (-373.85) -10.1% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 10.88 (276.25) | -2.34 (-59.5) -17.7% |
| Revolutions per mile (km) | 434.31 (269.87) | 483.05 (300.15) | 48.73 (30.28) 11.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.98 mph (28.94 km/h) |
| 25 mph (40.23 km/h) | 22.48 mph (36.17 km/h) |
| 30 mph (48.28 km/h) | 26.97 mph (43.41 km/h) |
| 35 mph (56.33 km/h) | 31.47 mph (50.64 km/h) |
| 40 mph (64.37 km/h) | 35.96 mph (57.88 km/h) |
| 45 mph (72.42 km/h) | 40.46 mph (65.11 km/h) |
| 50 mph (80.47 km/h) | 44.96 mph (72.35 km/h) |
| 55 mph (88.51 km/h) | 49.45 mph (79.58 km/h) |
| 60 mph (96.56 km/h) | 53.95 mph (86.82 km/h) |
| 65 mph (104.61 km/h) | 58.44 mph (94.05 km/h) |
| 70 mph (112.65 km/h) | 62.94 mph (101.29 km/h) |
| 75 mph (120.7 km/h) | 67.43 mph (108.52 km/h) |
| 80 mph (128.75 km/h) | 71.93 mph (115.76 km/h) |
| 85 mph (136.79 km/h) | 76.42 mph (122.99 km/h) |
| 90 mph (144.84 km/h) | 80.92 mph (130.23 km/h) |
| 95 mph (152.89 km/h) | 85.42 mph (137.46 km/h) |
| 100 mph (160.93 km/h) | 89.91 mph (144.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1229 | 1428 | 1538 | 1606 | 1679 | 1731 | 1789 | 1857 | 1951 | 2045 | 2150 | 2234 | 2385 | 2553 | 2683 | 2767 | 2814 | 2987 | 3227 | 3751 |
Better Fuel Economy Factory Ratios Increased Power
