Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 190/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 28.22 (716.8) | -2.18 (-55.4) -7.2% |
| Width inches (mm) | 6.89 (175) | 7.48 (190) | 0.59 (15) 8.6% |
| Circum. inches (mm) | 95.51 (2425.94) | 88.66 (2251.89) | -6.85 (-174.04) -7.2% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.61 (142.5) | -0.59 (-15) -9.5% |
| Revolutions per mile (km) | 663.39 (412.21) | 714.66 (444.07) | 51.27 (31.86) 7.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.57 mph (29.88 km/h) |
| 25 mph (40.23 km/h) | 23.21 mph (37.35 km/h) |
| 30 mph (48.28 km/h) | 27.85 mph (44.82 km/h) |
| 35 mph (56.33 km/h) | 32.49 mph (52.29 km/h) |
| 40 mph (64.37 km/h) | 37.13 mph (59.76 km/h) |
| 45 mph (72.42 km/h) | 41.77 mph (67.22 km/h) |
| 50 mph (80.47 km/h) | 46.41 mph (74.69 km/h) |
| 55 mph (88.51 km/h) | 51.05 mph (82.16 km/h) |
| 60 mph (96.56 km/h) | 55.7 mph (89.63 km/h) |
| 65 mph (104.61 km/h) | 60.34 mph (97.1 km/h) |
| 70 mph (112.65 km/h) | 64.98 mph (104.57 km/h) |
| 75 mph (120.7 km/h) | 69.62 mph (112.04 km/h) |
| 80 mph (128.75 km/h) | 74.26 mph (119.51 km/h) |
| 85 mph (136.79 km/h) | 78.9 mph (126.98 km/h) |
| 90 mph (144.84 km/h) | 83.54 mph (134.45 km/h) |
| 95 mph (152.89 km/h) | 88.18 mph (141.92 km/h) |
| 100 mph (160.93 km/h) | 92.83 mph (149.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1819 | 2113 | 2275 | 2376 | 2484 | 2562 | 2647 | 2747 | 2887 | 3026 | 3181 | 3305 | 3529 | 3777 | 3970 | 4094 | 4164 | 4419 | 4775 | 5549 |
Better Fuel Economy Factory Ratios Increased Power
