Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-17 | 165/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.69 (728.8) | 29.69 (754.2) | 1 (25.4) 3.5% |
| Width inches (mm) | 6.5 (165) | 6.5 (165) | 0 (0) 0% |
| Circum. inches (mm) | 90.14 (2289.59) | 93.28 (2369.39) | 3.14 (79.8) 3.5% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 5.85 (148.5) | 0 (0) 0% |
| Revolutions per mile (km) | 702.9 (436.76) | 679.22 (422.05) | -23.67 (-14.71) -3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.31 km/h) |
| 25 mph (40.23 km/h) | 25.87 mph (41.64 km/h) |
| 30 mph (48.28 km/h) | 31.05 mph (49.96 km/h) |
| 35 mph (56.33 km/h) | 36.22 mph (58.29 km/h) |
| 40 mph (64.37 km/h) | 41.39 mph (66.62 km/h) |
| 45 mph (72.42 km/h) | 46.57 mph (74.94 km/h) |
| 50 mph (80.47 km/h) | 51.74 mph (83.27 km/h) |
| 55 mph (88.51 km/h) | 56.92 mph (91.6 km/h) |
| 60 mph (96.56 km/h) | 62.09 mph (99.93 km/h) |
| 65 mph (104.61 km/h) | 67.27 mph (108.25 km/h) |
| 70 mph (112.65 km/h) | 72.44 mph (116.58 km/h) |
| 75 mph (120.7 km/h) | 77.61 mph (124.91 km/h) |
| 80 mph (128.75 km/h) | 82.79 mph (133.23 km/h) |
| 85 mph (136.79 km/h) | 87.96 mph (141.56 km/h) |
| 90 mph (144.84 km/h) | 93.14 mph (149.89 km/h) |
| 95 mph (152.89 km/h) | 98.31 mph (158.22 km/h) |
| 100 mph (160.93 km/h) | 103.49 mph (166.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1728 | 2008 | 2162 | 2258 | 2361 | 2435 | 2516 | 2611 | 2744 | 2876 | 3023 | 3141 | 3354 | 3589 | 3773 | 3891 | 3957 | 4200 | 4538 | 5274 |
Better Fuel Economy Factory Ratios Increased Power
