Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 290/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 32.98 (837.8) | 2.58 (65.6) 8.5% |
| Width inches (mm) | 6.89 (175) | 11.42 (290) | 4.53 (115) 65.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 103.62 (2632.03) | 8.11 (206.09) 8.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.99 (203) | 1.79 (45.5) 28.9% |
| Revolutions per mile (km) | 663.39 (412.21) | 611.45 (379.93) | -51.94 (-32.28) -7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.7 mph (34.92 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.65 km/h) |
| 30 mph (48.28 km/h) | 32.55 mph (52.38 km/h) |
| 35 mph (56.33 km/h) | 37.97 mph (61.11 km/h) |
| 40 mph (64.37 km/h) | 43.4 mph (69.84 km/h) |
| 45 mph (72.42 km/h) | 48.82 mph (78.57 km/h) |
| 50 mph (80.47 km/h) | 54.25 mph (87.3 km/h) |
| 55 mph (88.51 km/h) | 59.67 mph (96.03 km/h) |
| 60 mph (96.56 km/h) | 65.1 mph (104.76 km/h) |
| 65 mph (104.61 km/h) | 70.52 mph (113.49 km/h) |
| 70 mph (112.65 km/h) | 75.95 mph (122.22 km/h) |
| 75 mph (120.7 km/h) | 81.37 mph (130.95 km/h) |
| 80 mph (128.75 km/h) | 86.8 mph (139.69 km/h) |
| 85 mph (136.79 km/h) | 92.22 mph (148.42 km/h) |
| 90 mph (144.84 km/h) | 97.65 mph (157.15 km/h) |
| 95 mph (152.89 km/h) | 103.07 mph (165.88 km/h) |
| 100 mph (160.93 km/h) | 108.5 mph (174.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1556 | 1808 | 1947 | 2033 | 2125 | 2192 | 2264 | 2351 | 2470 | 2589 | 2721 | 2827 | 3019 | 3231 | 3397 | 3503 | 3562 | 3781 | 4085 | 4748 |
Better Fuel Economy Factory Ratios Increased Power
