Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-17 | 190/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.8 (629.8) | 26.72 (678.8) | 1.93 (49) 7.8% |
| Width inches (mm) | 7.09 (180) | 7.48 (190) | 0.39 (10) 5.6% |
| Circum. inches (mm) | 77.9 (1978.58) | 83.96 (2132.51) | 6.06 (153.94) 7.8% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.86 (123.5) | 0.96 (24.5) 24.7% |
| Revolutions per mile (km) | 813.39 (505.41) | 754.67 (468.93) | -58.72 (-36.48) -7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.56 mph (34.69 km/h) |
| 25 mph (40.23 km/h) | 26.95 mph (43.36 km/h) |
| 30 mph (48.28 km/h) | 32.33 mph (52.04 km/h) |
| 35 mph (56.33 km/h) | 37.72 mph (60.71 km/h) |
| 40 mph (64.37 km/h) | 43.11 mph (69.38 km/h) |
| 45 mph (72.42 km/h) | 48.5 mph (78.06 km/h) |
| 50 mph (80.47 km/h) | 53.89 mph (86.73 km/h) |
| 55 mph (88.51 km/h) | 59.28 mph (95.4 km/h) |
| 60 mph (96.56 km/h) | 64.67 mph (104.07 km/h) |
| 65 mph (104.61 km/h) | 70.06 mph (112.75 km/h) |
| 70 mph (112.65 km/h) | 75.45 mph (121.42 km/h) |
| 75 mph (120.7 km/h) | 80.84 mph (130.09 km/h) |
| 80 mph (128.75 km/h) | 86.22 mph (138.76 km/h) |
| 85 mph (136.79 km/h) | 91.61 mph (147.44 km/h) |
| 90 mph (144.84 km/h) | 97 mph (156.11 km/h) |
| 95 mph (152.89 km/h) | 102.39 mph (164.78 km/h) |
| 100 mph (160.93 km/h) | 107.78 mph (173.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1920 | 2231 | 2403 | 2509 | 2623 | 2705 | 2795 | 2901 | 3048 | 3195 | 3359 | 3490 | 3727 | 3988 | 4192 | 4323 | 4397 | 4666 | 5042 | 5860 |
Better Fuel Economy Factory Ratios Increased Power
