Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/70-17 | 315/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.41 (543.8) | 30.64 (778.3) | 9.23 (234.5) 43.1% |
| Width inches (mm) | 3.15 (80) | 12.4 (315) | 9.25 (235) 293.8% |
| Circum. inches (mm) | 67.26 (1708.4) | 96.26 (2445.1) | 29 (736.7) 43.1% |
| Sidewall Height inches (mm) | 2.2 (56) | 6.82 (173.25) | 4.62 (117.25) 209.4% |
| Revolutions per mile (km) | 942.02 (585.34) | 658.19 (408.98) | -283.83 (-176.36) -30.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.62 mph (46.07 km/h) |
| 25 mph (40.23 km/h) | 35.78 mph (57.58 km/h) |
| 30 mph (48.28 km/h) | 42.94 mph (69.1 km/h) |
| 35 mph (56.33 km/h) | 50.09 mph (80.62 km/h) |
| 40 mph (64.37 km/h) | 57.25 mph (92.13 km/h) |
| 45 mph (72.42 km/h) | 64.41 mph (103.65 km/h) |
| 50 mph (80.47 km/h) | 71.56 mph (115.17 km/h) |
| 55 mph (88.51 km/h) | 78.72 mph (126.68 km/h) |
| 60 mph (96.56 km/h) | 85.87 mph (138.2 km/h) |
| 65 mph (104.61 km/h) | 93.03 mph (149.72 km/h) |
| 70 mph (112.65 km/h) | 100.19 mph (161.23 km/h) |
| 75 mph (120.7 km/h) | 107.34 mph (172.75 km/h) |
| 80 mph (128.75 km/h) | 114.5 mph (184.27 km/h) |
| 85 mph (136.79 km/h) | 121.65 mph (195.78 km/h) |
| 90 mph (144.84 km/h) | 128.81 mph (207.3 km/h) |
| 95 mph (152.89 km/h) | 135.97 mph (218.82 km/h) |
| 100 mph (160.93 km/h) | 143.12 mph (230.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1675 | 1946 | 2095 | 2188 | 2288 | 2359 | 2438 | 2530 | 2659 | 2787 | 2929 | 3043 | 3250 | 3478 | 3656 | 3770 | 3835 | 4070 | 4398 | 5110 |
Better Fuel Economy Factory Ratios Increased Power
