Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 175/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 30.33 (770.5) | 1.24 (31.5) 4.3% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 91.4 (2321.64) | 95.3 (2420.6) | 3.9 (98.96) 4.3% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 5.17 (131.25) | 0.62 (15.75) 13.6% |
| Revolutions per mile (km) | 693.19 (430.73) | 664.85 (413.12) | -28.34 (-17.61) -4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.85 mph (33.56 km/h) |
| 25 mph (40.23 km/h) | 26.07 mph (41.95 km/h) |
| 30 mph (48.28 km/h) | 31.28 mph (50.34 km/h) |
| 35 mph (56.33 km/h) | 36.49 mph (58.73 km/h) |
| 40 mph (64.37 km/h) | 41.71 mph (67.12 km/h) |
| 45 mph (72.42 km/h) | 46.92 mph (75.51 km/h) |
| 50 mph (80.47 km/h) | 52.13 mph (83.9 km/h) |
| 55 mph (88.51 km/h) | 57.34 mph (92.29 km/h) |
| 60 mph (96.56 km/h) | 62.56 mph (100.68 km/h) |
| 65 mph (104.61 km/h) | 67.77 mph (109.07 km/h) |
| 70 mph (112.65 km/h) | 72.98 mph (117.46 km/h) |
| 75 mph (120.7 km/h) | 78.2 mph (125.85 km/h) |
| 80 mph (128.75 km/h) | 83.41 mph (134.24 km/h) |
| 85 mph (136.79 km/h) | 88.62 mph (142.63 km/h) |
| 90 mph (144.84 km/h) | 93.84 mph (151.02 km/h) |
| 95 mph (152.89 km/h) | 99.05 mph (159.4 km/h) |
| 100 mph (160.93 km/h) | 104.26 mph (167.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1692 | 1966 | 2117 | 2210 | 2311 | 2383 | 2462 | 2556 | 2685 | 2815 | 2959 | 3074 | 3283 | 3513 | 3693 | 3809 | 3873 | 4111 | 4442 | 5162 |
Better Fuel Economy Factory Ratios Increased Power
