Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.85 (555) | 23.74 (603) | 1.89 (48) 8.6% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 68.65 (1743.58) | 74.58 (1894.38) | 5.94 (150.8) 8.6% |
| Sidewall Height inches (mm) | 3.43 (87) | 4.37 (111) | 0.94 (24) 27.6% |
| Revolutions per mile (km) | 923.01 (573.53) | 849.54 (527.88) | -73.47 (-45.65) -8% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.71 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.46 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.2 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.94 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.68 km/h) |
| 50 mph (80.47 km/h) | 54.32 mph (87.43 km/h) |
| 55 mph (88.51 km/h) | 59.76 mph (96.17 km/h) |
| 60 mph (96.56 km/h) | 65.19 mph (104.91 km/h) |
| 65 mph (104.61 km/h) | 70.62 mph (113.65 km/h) |
| 70 mph (112.65 km/h) | 76.05 mph (122.4 km/h) |
| 75 mph (120.7 km/h) | 81.49 mph (131.14 km/h) |
| 80 mph (128.75 km/h) | 86.92 mph (139.88 km/h) |
| 85 mph (136.79 km/h) | 92.35 mph (148.63 km/h) |
| 90 mph (144.84 km/h) | 97.78 mph (157.37 km/h) |
| 95 mph (152.89 km/h) | 103.22 mph (166.11 km/h) |
| 100 mph (160.93 km/h) | 108.65 mph (174.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2162 | 2511 | 2705 | 2824 | 2953 | 3045 | 3146 | 3266 | 3431 | 3597 | 3781 | 3928 | 4195 | 4489 | 4719 | 4867 | 4949 | 5253 | 5676 | 6596 |
Better Fuel Economy Factory Ratios Increased Power
