Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 290/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 33.98 (863.2) | 3.58 (91) 11.8% |
| Width inches (mm) | 6.89 (175) | 11.42 (290) | 4.53 (115) 65.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 106.76 (2711.82) | 11.26 (285.88) 11.8% |
| 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) | 593.45 (368.75) | -69.94 (-43.46) -10.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.36 mph (35.98 km/h) |
| 25 mph (40.23 km/h) | 27.95 mph (44.98 km/h) |
| 30 mph (48.28 km/h) | 33.54 mph (53.97 km/h) |
| 35 mph (56.33 km/h) | 39.12 mph (62.97 km/h) |
| 40 mph (64.37 km/h) | 44.71 mph (71.96 km/h) |
| 45 mph (72.42 km/h) | 50.3 mph (80.96 km/h) |
| 50 mph (80.47 km/h) | 55.89 mph (89.95 km/h) |
| 55 mph (88.51 km/h) | 61.48 mph (98.95 km/h) |
| 60 mph (96.56 km/h) | 67.07 mph (107.94 km/h) |
| 65 mph (104.61 km/h) | 72.66 mph (116.94 km/h) |
| 70 mph (112.65 km/h) | 78.25 mph (125.93 km/h) |
| 75 mph (120.7 km/h) | 83.84 mph (134.93 km/h) |
| 80 mph (128.75 km/h) | 89.43 mph (143.92 km/h) |
| 85 mph (136.79 km/h) | 95.02 mph (152.92 km/h) |
| 90 mph (144.84 km/h) | 100.61 mph (161.91 km/h) |
| 95 mph (152.89 km/h) | 106.2 mph (170.91 km/h) |
| 100 mph (160.93 km/h) | 111.78 mph (179.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1510 | 1754 | 1889 | 1973 | 2063 | 2127 | 2198 | 2281 | 2397 | 2513 | 2641 | 2744 | 2930 | 3136 | 3297 | 3400 | 3457 | 3670 | 3965 | 4608 |
Better Fuel Economy Factory Ratios Increased Power
