Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-18 | 165/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.47 (697.7) | 25.15 (638.7) | -2.32 (-59) -8.5% |
| Width inches (mm) | 7.28 (185) | 6.5 (165) | -0.79 (-20) -10.8% |
| Circum. inches (mm) | 86.29 (2191.89) | 79 (2006.54) | -7.3 (-185.35) -8.5% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 3.57 (90.75) | -1.16 (-29.5) -24.5% |
| Revolutions per mile (km) | 734.23 (456.23) | 802.05 (498.37) | 67.82 (42.14) 9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.31 mph (29.47 km/h) |
| 25 mph (40.23 km/h) | 22.89 mph (36.83 km/h) |
| 30 mph (48.28 km/h) | 27.46 mph (44.2 km/h) |
| 35 mph (56.33 km/h) | 32.04 mph (51.56 km/h) |
| 40 mph (64.37 km/h) | 36.62 mph (58.93 km/h) |
| 45 mph (72.42 km/h) | 41.19 mph (66.3 km/h) |
| 50 mph (80.47 km/h) | 45.77 mph (73.66 km/h) |
| 55 mph (88.51 km/h) | 50.35 mph (81.03 km/h) |
| 60 mph (96.56 km/h) | 54.93 mph (88.4 km/h) |
| 65 mph (104.61 km/h) | 59.5 mph (95.76 km/h) |
| 70 mph (112.65 km/h) | 64.08 mph (103.13 km/h) |
| 75 mph (120.7 km/h) | 68.66 mph (110.49 km/h) |
| 80 mph (128.75 km/h) | 73.23 mph (117.86 km/h) |
| 85 mph (136.79 km/h) | 77.81 mph (125.23 km/h) |
| 90 mph (144.84 km/h) | 82.39 mph (132.59 km/h) |
| 95 mph (152.89 km/h) | 86.97 mph (139.96 km/h) |
| 100 mph (160.93 km/h) | 91.54 mph (147.33 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
