Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 265/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 37.74 (958.5) | -8.7 (-221) -18.7% |
| Width inches (mm) | 15.55 (395) | 10.43 (265) | -5.12 (-130) -32.9% |
| Circum. inches (mm) | 145.89 (3705.51) | 118.55 (3011.22) | -27.33 (-694.29) -18.7% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 8.87 (225.25) | -4.35 (-110.5) -32.9% |
| Revolutions per mile (km) | 434.31 (269.87) | 534.45 (332.09) | 100.14 (62.22) 23.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.25 mph (26.16 km/h) |
| 25 mph (40.23 km/h) | 20.32 mph (32.7 km/h) |
| 30 mph (48.28 km/h) | 24.38 mph (39.23 km/h) |
| 35 mph (56.33 km/h) | 28.44 mph (45.77 km/h) |
| 40 mph (64.37 km/h) | 32.51 mph (52.31 km/h) |
| 45 mph (72.42 km/h) | 36.57 mph (58.85 km/h) |
| 50 mph (80.47 km/h) | 40.63 mph (65.39 km/h) |
| 55 mph (88.51 km/h) | 44.69 mph (71.93 km/h) |
| 60 mph (96.56 km/h) | 48.76 mph (78.47 km/h) |
| 65 mph (104.61 km/h) | 52.82 mph (85.01 km/h) |
| 70 mph (112.65 km/h) | 56.88 mph (91.55 km/h) |
| 75 mph (120.7 km/h) | 60.95 mph (98.09 km/h) |
| 80 mph (128.75 km/h) | 65.01 mph (104.62 km/h) |
| 85 mph (136.79 km/h) | 69.07 mph (111.16 km/h) |
| 90 mph (144.84 km/h) | 73.14 mph (117.7 km/h) |
| 95 mph (152.89 km/h) | 77.2 mph (124.24 km/h) |
| 100 mph (160.93 km/h) | 81.26 mph (130.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1360 | 1580 | 1702 | 1777 | 1858 | 1916 | 1979 | 2055 | 2159 | 2263 | 2379 | 2471 | 2639 | 2824 | 2969 | 3062 | 3114 | 3305 | 3571 | 4150 |
Better Fuel Economy Factory Ratios Increased Power
