Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/50-17 | 190/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.72 (551.8) | 25.23 (640.8) | 3.5 (89) 16.1% |
| Width inches (mm) | 4.72 (120) | 7.48 (190) | 2.76 (70) 58.3% |
| Circum. inches (mm) | 68.25 (1733.53) | 79.26 (2013.13) | 11.01 (279.6) 16.1% |
| Sidewall Height inches (mm) | 2.36 (60) | 4.11 (104.5) | 1.75 (44.5) 74.2% |
| Revolutions per mile (km) | 928.36 (576.86) | 799.42 (496.74) | -128.94 (-80.12) -13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.23 mph (37.38 km/h) |
| 25 mph (40.23 km/h) | 29.03 mph (46.72 km/h) |
| 30 mph (48.28 km/h) | 34.84 mph (56.07 km/h) |
| 35 mph (56.33 km/h) | 40.65 mph (65.41 km/h) |
| 40 mph (64.37 km/h) | 46.45 mph (74.76 km/h) |
| 45 mph (72.42 km/h) | 52.26 mph (84.1 km/h) |
| 50 mph (80.47 km/h) | 58.06 mph (93.45 km/h) |
| 55 mph (88.51 km/h) | 63.87 mph (102.79 km/h) |
| 60 mph (96.56 km/h) | 69.68 mph (112.14 km/h) |
| 65 mph (104.61 km/h) | 75.48 mph (121.48 km/h) |
| 70 mph (112.65 km/h) | 81.29 mph (130.82 km/h) |
| 75 mph (120.7 km/h) | 87.1 mph (140.17 km/h) |
| 80 mph (128.75 km/h) | 92.9 mph (149.51 km/h) |
| 85 mph (136.79 km/h) | 98.71 mph (158.86 km/h) |
| 90 mph (144.84 km/h) | 104.52 mph (168.2 km/h) |
| 95 mph (152.89 km/h) | 110.32 mph (177.55 km/h) |
| 100 mph (160.93 km/h) | 116.13 mph (186.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2034 | 2363 | 2545 | 2658 | 2779 | 2865 | 2961 | 3073 | 3229 | 3385 | 3558 | 3697 | 3948 | 4225 | 4441 | 4580 | 4657 | 4943 | 5341 | 6207 |
Better Fuel Economy Factory Ratios Increased Power
