Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 165/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 31.04 (788.5) | 1.95 (49.5) 6.7% |
| Width inches (mm) | 6.5 (165) | 6.5 (165) | 0 (0) 0% |
| Circum. inches (mm) | 91.4 (2321.64) | 97.53 (2477.15) | 6.12 (155.51) 6.7% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 5.52 (140.25) | 0.97 (24.75) 21.4% |
| Revolutions per mile (km) | 693.19 (430.73) | 649.68 (403.69) | -43.52 (-27.04) -6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.34 mph (34.34 km/h) |
| 25 mph (40.23 km/h) | 26.67 mph (42.93 km/h) |
| 30 mph (48.28 km/h) | 32.01 mph (51.51 km/h) |
| 35 mph (56.33 km/h) | 37.34 mph (60.1 km/h) |
| 40 mph (64.37 km/h) | 42.68 mph (68.69 km/h) |
| 45 mph (72.42 km/h) | 48.01 mph (77.27 km/h) |
| 50 mph (80.47 km/h) | 53.35 mph (85.86 km/h) |
| 55 mph (88.51 km/h) | 58.68 mph (94.44 km/h) |
| 60 mph (96.56 km/h) | 64.02 mph (103.03 km/h) |
| 65 mph (104.61 km/h) | 69.35 mph (111.61 km/h) |
| 70 mph (112.65 km/h) | 74.69 mph (120.2 km/h) |
| 75 mph (120.7 km/h) | 80.02 mph (128.79 km/h) |
| 80 mph (128.75 km/h) | 85.36 mph (137.37 km/h) |
| 85 mph (136.79 km/h) | 90.69 mph (145.96 km/h) |
| 90 mph (144.84 km/h) | 96.03 mph (154.54 km/h) |
| 95 mph (152.89 km/h) | 101.36 mph (163.13 km/h) |
| 100 mph (160.93 km/h) | 106.7 mph (171.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1921 | 2068 | 2160 | 2258 | 2329 | 2406 | 2498 | 2624 | 2751 | 2892 | 3004 | 3208 | 3433 | 3609 | 3722 | 3785 | 4017 | 4341 | 5044 |
Better Fuel Economy Factory Ratios Increased Power
