Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 50/80-17 | 120/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.15 (511.8) | 24.56 (623.8) | 4.41 (112) 21.9% |
| Width inches (mm) | 1.97 (50) | 4.72 (120) | 2.76 (70) 140% |
| Circum. inches (mm) | 63.3 (1607.87) | 77.15 (1959.73) | 13.85 (351.86) 21.9% |
| Sidewall Height inches (mm) | 1.57 (40) | 3.78 (96) | 2.2 (56) 140% |
| Revolutions per mile (km) | 1000.92 (621.94) | 821.21 (510.27) | -179.71 (-111.67) -18% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.38 mph (39.23 km/h) |
| 25 mph (40.23 km/h) | 30.47 mph (49.04 km/h) |
| 30 mph (48.28 km/h) | 36.57 mph (58.85 km/h) |
| 35 mph (56.33 km/h) | 42.66 mph (68.65 km/h) |
| 40 mph (64.37 km/h) | 48.75 mph (78.46 km/h) |
| 45 mph (72.42 km/h) | 54.85 mph (88.27 km/h) |
| 50 mph (80.47 km/h) | 60.94 mph (98.08 km/h) |
| 55 mph (88.51 km/h) | 67.04 mph (107.88 km/h) |
| 60 mph (96.56 km/h) | 73.13 mph (117.69 km/h) |
| 65 mph (104.61 km/h) | 79.22 mph (127.5 km/h) |
| 70 mph (112.65 km/h) | 85.32 mph (137.31 km/h) |
| 75 mph (120.7 km/h) | 91.41 mph (147.11 km/h) |
| 80 mph (128.75 km/h) | 97.51 mph (156.92 km/h) |
| 85 mph (136.79 km/h) | 103.6 mph (166.73 km/h) |
| 90 mph (144.84 km/h) | 109.7 mph (176.54 km/h) |
| 95 mph (152.89 km/h) | 115.79 mph (186.35 km/h) |
| 100 mph (160.93 km/h) | 121.88 mph (196.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2090 | 2428 | 2614 | 2730 | 2855 | 2944 | 3041 | 3157 | 3317 | 3477 | 3655 | 3797 | 4055 | 4340 | 4562 | 4704 | 4784 | 5078 | 5487 | 6376 |
Better Fuel Economy Factory Ratios Increased Power
