Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/50-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.89 (556) | 23.74 (603) | 1.85 (47) 8.5% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 68.77 (1746.73) | 74.58 (1894.38) | 5.81 (147.65) 8.5% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 4.37 (111) | 0.93 (23.5) 26.9% |
| Revolutions per mile (km) | 921.35 (572.5) | 849.54 (527.88) | -71.81 (-44.62) -7.8% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.69 mph (34.91 km/h) |
| 25 mph (40.23 km/h) | 27.11 mph (43.63 km/h) |
| 30 mph (48.28 km/h) | 32.54 mph (52.36 km/h) |
| 35 mph (56.33 km/h) | 37.96 mph (61.09 km/h) |
| 40 mph (64.37 km/h) | 43.38 mph (69.82 km/h) |
| 45 mph (72.42 km/h) | 48.8 mph (78.54 km/h) |
| 50 mph (80.47 km/h) | 54.23 mph (87.27 km/h) |
| 55 mph (88.51 km/h) | 59.65 mph (96 km/h) |
| 60 mph (96.56 km/h) | 65.07 mph (104.72 km/h) |
| 65 mph (104.61 km/h) | 70.49 mph (113.45 km/h) |
| 70 mph (112.65 km/h) | 75.92 mph (122.18 km/h) |
| 75 mph (120.7 km/h) | 81.34 mph (130.9 km/h) |
| 80 mph (128.75 km/h) | 86.76 mph (139.63 km/h) |
| 85 mph (136.79 km/h) | 92.19 mph (148.36 km/h) |
| 90 mph (144.84 km/h) | 97.61 mph (157.09 km/h) |
| 95 mph (152.89 km/h) | 103.03 mph (165.81 km/h) |
| 100 mph (160.93 km/h) | 108.45 mph (174.54 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
