Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 36/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 36.03 (915.04) | -10.41 (-264.46) -22.4% |
| Width inches (mm) | 15.55 (395) | 12.52 (318) | -3.03 (-77) -19.5% |
| Circum. inches (mm) | 145.89 (3705.51) | 113.18 (2874.68) | -32.71 (-830.83) -22.4% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 8.01 (203.52) | -5.21 (-132.23) -39.4% |
| Revolutions per mile (km) | 434.31 (269.87) | 559.83 (347.86) | 125.52 (78) 28.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.52 mph (24.97 km/h) |
| 25 mph (40.23 km/h) | 19.39 mph (31.21 km/h) |
| 30 mph (48.28 km/h) | 23.27 mph (37.46 km/h) |
| 35 mph (56.33 km/h) | 27.15 mph (43.7 km/h) |
| 40 mph (64.37 km/h) | 31.03 mph (49.94 km/h) |
| 45 mph (72.42 km/h) | 34.91 mph (56.18 km/h) |
| 50 mph (80.47 km/h) | 38.79 mph (62.43 km/h) |
| 55 mph (88.51 km/h) | 42.67 mph (68.67 km/h) |
| 60 mph (96.56 km/h) | 46.55 mph (74.91 km/h) |
| 65 mph (104.61 km/h) | 50.43 mph (81.15 km/h) |
| 70 mph (112.65 km/h) | 54.31 mph (87.4 km/h) |
| 75 mph (120.7 km/h) | 58.18 mph (93.64 km/h) |
| 80 mph (128.75 km/h) | 62.06 mph (99.88 km/h) |
| 85 mph (136.79 km/h) | 65.94 mph (106.12 km/h) |
| 90 mph (144.84 km/h) | 69.82 mph (112.37 km/h) |
| 95 mph (152.89 km/h) | 73.7 mph (118.61 km/h) |
| 100 mph (160.93 km/h) | 77.58 mph (124.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1425 | 1655 | 1782 | 1861 | 1946 | 2007 | 2073 | 2152 | 2261 | 2370 | 2492 | 2589 | 2764 | 2958 | 3110 | 3207 | 3262 | 3462 | 3741 | 4347 |
Better Fuel Economy Factory Ratios Increased Power
