Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 70/80-17 | 80/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.41 (543.8) | 22.04 (559.8) | 0.63 (16) 2.9% |
| Width inches (mm) | 2.76 (70) | 3.15 (80) | 0.39 (10) 14.3% |
| Circum. inches (mm) | 67.26 (1708.4) | 69.24 (1758.66) | 1.98 (50.27) 2.9% |
| Sidewall Height inches (mm) | 2.2 (56) | 2.52 (64) | 0.31 (8) 14.3% |
| Revolutions per mile (km) | 942.02 (585.34) | 915.09 (568.61) | -26.92 (-16.73) -2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.59 mph (33.13 km/h) |
| 25 mph (40.23 km/h) | 25.74 mph (41.42 km/h) |
| 30 mph (48.28 km/h) | 30.88 mph (49.7 km/h) |
| 35 mph (56.33 km/h) | 36.03 mph (57.98 km/h) |
| 40 mph (64.37 km/h) | 41.18 mph (66.27 km/h) |
| 45 mph (72.42 km/h) | 46.32 mph (74.55 km/h) |
| 50 mph (80.47 km/h) | 51.47 mph (82.83 km/h) |
| 55 mph (88.51 km/h) | 56.62 mph (91.12 km/h) |
| 60 mph (96.56 km/h) | 61.77 mph (99.4 km/h) |
| 65 mph (104.61 km/h) | 66.91 mph (107.69 km/h) |
| 70 mph (112.65 km/h) | 72.06 mph (115.97 km/h) |
| 75 mph (120.7 km/h) | 77.21 mph (124.25 km/h) |
| 80 mph (128.75 km/h) | 82.35 mph (132.54 km/h) |
| 85 mph (136.79 km/h) | 87.5 mph (140.82 km/h) |
| 90 mph (144.84 km/h) | 92.65 mph (149.1 km/h) |
| 95 mph (152.89 km/h) | 97.8 mph (157.39 km/h) |
| 100 mph (160.93 km/h) | 102.94 mph (165.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2329 | 2705 | 2913 | 3042 | 3181 | 3280 | 3389 | 3518 | 3696 | 3875 | 4073 | 4231 | 4519 | 4836 | 5084 | 5242 | 5331 | 5658 | 6114 | 7105 |
Better Fuel Economy Factory Ratios Increased Power
