Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-18 | 185/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.47 (697.7) | 26.74 (679.2) | -0.73 (-18.5) -2.7% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 86.29 (2191.89) | 84.01 (2133.77) | -2.29 (-58.12) -2.7% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 4.37 (111) | -0.36 (-9.25) -7.7% |
| Revolutions per mile (km) | 734.23 (456.23) | 754.23 (468.65) | 20 (12.43) 2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.47 mph (31.33 km/h) |
| 25 mph (40.23 km/h) | 24.34 mph (39.17 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (47 km/h) |
| 35 mph (56.33 km/h) | 34.07 mph (54.83 km/h) |
| 40 mph (64.37 km/h) | 38.94 mph (62.67 km/h) |
| 45 mph (72.42 km/h) | 43.81 mph (70.5 km/h) |
| 50 mph (80.47 km/h) | 48.67 mph (78.33 km/h) |
| 55 mph (88.51 km/h) | 53.54 mph (86.17 km/h) |
| 60 mph (96.56 km/h) | 58.41 mph (94 km/h) |
| 65 mph (104.61 km/h) | 63.28 mph (101.83 km/h) |
| 70 mph (112.65 km/h) | 68.14 mph (109.67 km/h) |
| 75 mph (120.7 km/h) | 73.01 mph (117.5 km/h) |
| 80 mph (128.75 km/h) | 77.88 mph (125.33 km/h) |
| 85 mph (136.79 km/h) | 82.75 mph (133.17 km/h) |
| 90 mph (144.84 km/h) | 87.61 mph (141 km/h) |
| 95 mph (152.89 km/h) | 92.48 mph (148.83 km/h) |
| 100 mph (160.93 km/h) | 97.35 mph (156.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1919 | 2230 | 2401 | 2507 | 2622 | 2703 | 2793 | 2899 | 3046 | 3193 | 3357 | 3488 | 3724 | 3986 | 4190 | 4321 | 4394 | 4664 | 5039 | 5856 |
Better Fuel Economy Factory Ratios Increased Power
