Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 165/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 29.69 (754.2) | -0.71 (-18) -2.3% |
| Width inches (mm) | 6.89 (175) | 6.5 (165) | -0.39 (-10) -5.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 93.28 (2369.39) | -2.23 (-56.55) -2.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.85 (148.5) | -0.35 (-9) -5.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 679.22 (422.05) | 15.83 (9.84) 2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.53 mph (31.44 km/h) |
| 25 mph (40.23 km/h) | 24.42 mph (39.3 km/h) |
| 30 mph (48.28 km/h) | 29.3 mph (47.15 km/h) |
| 35 mph (56.33 km/h) | 34.18 mph (55.01 km/h) |
| 40 mph (64.37 km/h) | 39.07 mph (62.87 km/h) |
| 45 mph (72.42 km/h) | 43.95 mph (70.73 km/h) |
| 50 mph (80.47 km/h) | 48.83 mph (78.59 km/h) |
| 55 mph (88.51 km/h) | 53.72 mph (86.45 km/h) |
| 60 mph (96.56 km/h) | 58.6 mph (94.31 km/h) |
| 65 mph (104.61 km/h) | 63.48 mph (102.17 km/h) |
| 70 mph (112.65 km/h) | 68.37 mph (110.03 km/h) |
| 75 mph (120.7 km/h) | 73.25 mph (117.89 km/h) |
| 80 mph (128.75 km/h) | 78.14 mph (125.75 km/h) |
| 85 mph (136.79 km/h) | 83.02 mph (133.61 km/h) |
| 90 mph (144.84 km/h) | 87.9 mph (141.46 km/h) |
| 95 mph (152.89 km/h) | 92.79 mph (149.32 km/h) |
| 100 mph (160.93 km/h) | 97.67 mph (157.18 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
