Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/70-17 | 305/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.41 (543.8) | 37.41 (950.3) | 16 (406.5) 74.8% |
| Width inches (mm) | 3.15 (80) | 12.01 (305) | 8.86 (225) 281.3% |
| Circum. inches (mm) | 67.26 (1708.4) | 117.54 (2985.46) | 50.28 (1277.06) 74.8% |
| Sidewall Height inches (mm) | 2.2 (56) | 10.21 (259.25) | 8 (203.25) 362.9% |
| Revolutions per mile (km) | 942.02 (585.34) | 539.06 (334.96) | -402.96 (-250.39) -42.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 34.95 mph (56.25 km/h) |
| 25 mph (40.23 km/h) | 43.69 mph (70.31 km/h) |
| 30 mph (48.28 km/h) | 52.43 mph (84.37 km/h) |
| 35 mph (56.33 km/h) | 61.16 mph (98.43 km/h) |
| 40 mph (64.37 km/h) | 69.9 mph (112.49 km/h) |
| 45 mph (72.42 km/h) | 78.64 mph (126.56 km/h) |
| 50 mph (80.47 km/h) | 87.38 mph (140.62 km/h) |
| 55 mph (88.51 km/h) | 96.11 mph (154.68 km/h) |
| 60 mph (96.56 km/h) | 104.85 mph (168.74 km/h) |
| 65 mph (104.61 km/h) | 113.59 mph (182.8 km/h) |
| 70 mph (112.65 km/h) | 122.33 mph (196.87 km/h) |
| 75 mph (120.7 km/h) | 131.06 mph (210.93 km/h) |
| 80 mph (128.75 km/h) | 139.8 mph (224.99 km/h) |
| 85 mph (136.79 km/h) | 148.54 mph (239.05 km/h) |
| 90 mph (144.84 km/h) | 157.28 mph (253.11 km/h) |
| 95 mph (152.89 km/h) | 166.01 mph (267.17 km/h) |
| 100 mph (160.93 km/h) | 174.75 mph (281.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1372 | 1594 | 1716 | 1792 | 1874 | 1932 | 1996 | 2072 | 2177 | 2282 | 2399 | 2493 | 2662 | 2849 | 2995 | 3088 | 3141 | 3333 | 3602 | 4185 |
Better Fuel Economy Factory Ratios Increased Power
