Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.76 (629) | 23.74 (603) | -1.02 (-26) -4.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 77.8 (1976.06) | 74.58 (1894.38) | -3.22 (-81.68) -4.1% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.37 (111) | -0.51 (-13) -10.5% |
| Revolutions per mile (km) | 814.42 (506.06) | 849.54 (527.88) | 35.12 (21.82) 4.3% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.86 km/h) |
| 25 mph (40.23 km/h) | 23.97 mph (38.57 km/h) |
| 30 mph (48.28 km/h) | 28.76 mph (46.28 km/h) |
| 35 mph (56.33 km/h) | 33.55 mph (54 km/h) |
| 40 mph (64.37 km/h) | 38.35 mph (61.71 km/h) |
| 45 mph (72.42 km/h) | 43.14 mph (69.43 km/h) |
| 50 mph (80.47 km/h) | 47.93 mph (77.14 km/h) |
| 55 mph (88.51 km/h) | 52.73 mph (84.86 km/h) |
| 60 mph (96.56 km/h) | 57.52 mph (92.57 km/h) |
| 65 mph (104.61 km/h) | 62.31 mph (100.28 km/h) |
| 70 mph (112.65 km/h) | 67.11 mph (108 km/h) |
| 75 mph (120.7 km/h) | 71.9 mph (115.71 km/h) |
| 80 mph (128.75 km/h) | 76.69 mph (123.43 km/h) |
| 85 mph (136.79 km/h) | 81.49 mph (131.14 km/h) |
| 90 mph (144.84 km/h) | 86.28 mph (138.85 km/h) |
| 95 mph (152.89 km/h) | 91.07 mph (146.57 km/h) |
| 100 mph (160.93 km/h) | 95.87 mph (154.28 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
