Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 165/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 25.15 (638.7) | -4.55 (-115.5) -15.3% |
| Width inches (mm) | 6.5 (165) | 6.5 (165) | 0 (0) 0% |
| Circum. inches (mm) | 93.28 (2369.39) | 79 (2006.54) | -14.29 (-362.85) -15.3% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 3.57 (90.75) | -2.27 (-57.75) -38.9% |
| Revolutions per mile (km) | 679.22 (422.05) | 802.05 (498.37) | 122.83 (76.32) 18.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.94 mph (27.26 km/h) |
| 25 mph (40.23 km/h) | 21.17 mph (34.07 km/h) |
| 30 mph (48.28 km/h) | 25.41 mph (40.89 km/h) |
| 35 mph (56.33 km/h) | 29.64 mph (47.7 km/h) |
| 40 mph (64.37 km/h) | 33.87 mph (54.52 km/h) |
| 45 mph (72.42 km/h) | 38.11 mph (61.33 km/h) |
| 50 mph (80.47 km/h) | 42.34 mph (68.14 km/h) |
| 55 mph (88.51 km/h) | 46.58 mph (74.96 km/h) |
| 60 mph (96.56 km/h) | 50.81 mph (81.77 km/h) |
| 65 mph (104.61 km/h) | 55.05 mph (88.59 km/h) |
| 70 mph (112.65 km/h) | 59.28 mph (95.4 km/h) |
| 75 mph (120.7 km/h) | 63.51 mph (102.22 km/h) |
| 80 mph (128.75 km/h) | 67.75 mph (109.03 km/h) |
| 85 mph (136.79 km/h) | 71.98 mph (115.85 km/h) |
| 90 mph (144.84 km/h) | 76.22 mph (122.66 km/h) |
| 95 mph (152.89 km/h) | 80.45 mph (129.47 km/h) |
| 100 mph (160.93 km/h) | 84.69 mph (136.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2041 | 2371 | 2554 | 2666 | 2788 | 2875 | 2970 | 3083 | 3240 | 3396 | 3570 | 3709 | 3961 | 4238 | 4456 | 4595 | 4673 | 4959 | 5359 | 6227 |
Better Fuel Economy Factory Ratios Increased Power
