Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 320/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 34.64 (879.8) | 9.22 (234.3) 36.3% |
| Width inches (mm) | 10.83 (275) | 12.6 (320) | 1.77 (45) 16.4% |
| Circum. inches (mm) | 79.84 (2027.9) | 108.82 (2763.97) | 28.98 (736.08) 36.3% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 8.82 (224) | 6.11 (155.25) 225.8% |
| Revolutions per mile (km) | 793.6 (493.12) | 582.26 (361.8) | -211.34 (-131.32) -26.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.26 mph (43.87 km/h) |
| 25 mph (40.23 km/h) | 34.07 mph (54.84 km/h) |
| 30 mph (48.28 km/h) | 40.89 mph (65.8 km/h) |
| 35 mph (56.33 km/h) | 47.7 mph (76.77 km/h) |
| 40 mph (64.37 km/h) | 54.52 mph (87.74 km/h) |
| 45 mph (72.42 km/h) | 61.33 mph (98.71 km/h) |
| 50 mph (80.47 km/h) | 68.15 mph (109.67 km/h) |
| 55 mph (88.51 km/h) | 74.96 mph (120.64 km/h) |
| 60 mph (96.56 km/h) | 81.78 mph (131.61 km/h) |
| 65 mph (104.61 km/h) | 88.59 mph (142.58 km/h) |
| 70 mph (112.65 km/h) | 95.41 mph (153.54 km/h) |
| 75 mph (120.7 km/h) | 102.22 mph (164.51 km/h) |
| 80 mph (128.75 km/h) | 109.04 mph (175.48 km/h) |
| 85 mph (136.79 km/h) | 115.85 mph (186.45 km/h) |
| 90 mph (144.84 km/h) | 122.67 mph (197.41 km/h) |
| 95 mph (152.89 km/h) | 129.48 mph (208.38 km/h) |
| 100 mph (160.93 km/h) | 136.3 mph (219.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1482 | 1721 | 1854 | 1936 | 2024 | 2087 | 2156 | 2238 | 2352 | 2465 | 2591 | 2692 | 2875 | 3077 | 3235 | 3335 | 3392 | 3600 | 3890 | 4521 |
Better Fuel Economy Factory Ratios Increased Power
