Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-20 | 395/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.59 (878.5) | 46.44 (1179.5) | 11.85 (301) 34.3% |
| Width inches (mm) | 11.22 (285) | 15.55 (395) | 4.33 (110) 38.6% |
| Circum. inches (mm) | 108.66 (2759.89) | 145.89 (3705.51) | 37.23 (945.62) 34.3% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 13.22 (335.75) | 5.93 (150.5) 81.2% |
| Revolutions per mile (km) | 583.12 (362.33) | 434.31 (269.87) | -148.81 (-92.46) -25.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.85 mph (43.22 km/h) |
| 25 mph (40.23 km/h) | 33.57 mph (54.02 km/h) |
| 30 mph (48.28 km/h) | 40.28 mph (64.82 km/h) |
| 35 mph (56.33 km/h) | 46.99 mph (75.63 km/h) |
| 40 mph (64.37 km/h) | 53.71 mph (86.43 km/h) |
| 45 mph (72.42 km/h) | 60.42 mph (97.23 km/h) |
| 50 mph (80.47 km/h) | 67.13 mph (108.04 km/h) |
| 55 mph (88.51 km/h) | 73.84 mph (118.84 km/h) |
| 60 mph (96.56 km/h) | 80.56 mph (129.65 km/h) |
| 65 mph (104.61 km/h) | 87.27 mph (140.45 km/h) |
| 70 mph (112.65 km/h) | 93.98 mph (151.25 km/h) |
| 75 mph (120.7 km/h) | 100.7 mph (162.06 km/h) |
| 80 mph (128.75 km/h) | 107.41 mph (172.86 km/h) |
| 85 mph (136.79 km/h) | 114.12 mph (183.66 km/h) |
| 90 mph (144.84 km/h) | 120.84 mph (194.47 km/h) |
| 95 mph (152.89 km/h) | 127.55 mph (205.27 km/h) |
| 100 mph (160.93 km/h) | 134.26 mph (216.08 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
